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- Previous
  - 1
    - Problem creating PerformanceCounters I am trying to create new performance counters using the .Net framework, and even simple examples fail with exceptions. For example, the following code raises an InvalidOperationException while calling CounterExists. The message indicates that the category does not exist (even though the category must exist for the code to have gotten this far) Any thoughts on the problem? I tried with both the 1.0 and 1.1 versions of the framework. regards Mark using System; using System.Diagnostics; using System.Threading; public class PCWrite { public static void Main(string[] args) { string objectName = "MyObj"; string counterName = "MyCounter"; string instanceName = "MyInstance"; if(!PerformanceCounterCategory.Exists(objectName)) { PerformanceCounterCategory.Create(objectName,"Simple Counter Object",counterName,"Simple Counter"); } Console.WriteLine("Category Exists"); if(!PerformanceCounterCategory.CounterExists(objectName, counterName)) { Console.WriteLine("The counter does not exists!"); return; } Console.WriteLine("Counter Exists"); PerformanceCounter aCounter = new PerformanceCounter(objectName, counterName ,instanceName, false); aCounter.RawValue = 50; Console.WriteLine("Press \'q\' to quit the sample"); Console.WriteLine("Press \'+\' to increment the counter"); Console.WriteLine("Press \'-\' to decrement the counter"); Console.WriteLine("Started"); int command; do { command = Console.Read(); if(command=='-') aCounter.IncrementBy(-5); if(command=='+') aCounter.IncrementBy(5); } while(command!='q'); } } Tag: versions Tag: 95225
  - 2
    - Graphic: Format16bppGrayScale bitmap ? Hello, I have a 16 bit grayscale bitmap and want to draw this bitmap into another one. Look at the code: void Test(void) { // Beep(200,200); System::Drawing::Bitmap* pBmpSrc=NULL; System::Drawing::Bitmap* pBmpDst=NULL; System::Drawing::Graphics* pGr=NULL; try { pBmpSrc=new Bitmap(50,50,System::Drawing::Imaging::PixelFormat::Format16bppGrayScale); pBmpDst=new Bitmap(50,50,System::Drawing::Imaging::PixelFormat::Format32bppPArgb); pGr=Graphics::FromImage(pBmpDst); pGr->DrawImageUnscaled(pBmpSrc,0,0); } __finally { if(pGr) {pGr->Dispose();} if(pBmpSrc) {pBmpSrc->Dispose();} if(pBmpDst) {pBmpDst->Dispose();} } } The line pGr->DrawImageUnscaled(pBmpSrc,0,0); throws an System::ArgumentException. How can I convert a Format16bppGrayScale-bitmap to a Format32bppPArgb bitmap? Help is recommended, so much thanks in advance. Michael Tag: versions Tag: 95224
  - 3
    - ReflectionTypeLoadException on installing services Hi, I have to install a service in my PC which has been developed by my company. While installation the System.Reflection.ReflectionTypeLoadException exception is thrown. And the log is as follows - **********XXXX.installlog starts******************************* Installing assembly 'c:\program files\audiosoft\service\XXXX.exe'. Affected parameters are: assemblypath = c:\program files\audiosoft\service\XXXX.exe logfile = c:\program files\audiosoft\service\XXXX.InstallLog An exception occurred while trying to find the installers in the c:\program files\audiosoft\service\XXXX.exe assembly. System.Reflection.ReflectionTypeLoadException: One or more of the types in the assembly unable to load. Aborting installation for c:\program files\audiosoft\service\XXXX.exe. Rolling back assembly 'c:\program files\audiosoft\service\XXXX.exe'. Affected parameters are: assemblypath = c:\program files\audiosoft\service\XXXX.exe logfile = c:\program files\audiosoft\service\XXXX.InstallLog An exception occurred while trying to find the installers in the c:\program files\audiosoft\service\XXXX.exe assembly. System.Reflection.ReflectionTypeLoadException: One or more of the types in the assembly unable to load. Aborting installation for c:\program files\audiosoft\service\XXXX.exe. **********XXXX.installlog ends******************************* I have checked that both the runtime and the development machine have .NET v1.1.4322 Can someone tell me why this exception could occur & how to prevent it? Thanks in advance Ed Tag: versions Tag: 95221
  - 4
    - Minimum required privileges to get processname Hi, My vb.net console application (.net framework 1.1) is using a call to Process.GetCurrentProcess.ProcessName. the app works fine when I run it as administrator, but I would like the run it with a normal user account using the least possible privileges. Does anyone know what rights need to be set? As test, I already gave the user account the same rights in the Windows Server 2003 local security policy, but this did not work. I am not sure if the .NET framework Process class uses WMI, but adding permissions in WMI control tool did not work either. Thoughts anyone? Tag: versions Tag: 95219
  - 5
    - minimum required privileges to get processname Hi, My console application (vb.net, .net framework 1.1) is using a call to Process.GetCurrentProcess.ProcessName. It works fine when I run the app as administrator, but I would like the run it with a normal user account using the least possible privileges. Does anyone know what rights need to be set? I already gave the user the same rights in the Windows Server 2003 local security policy as the builtin administrator, but this did not work. I am not sure if the .NET framework Process class uses WMI, but adding permissions in WMI control tool did not work either. Thoughts anyone? Tag: versions Tag: 95218
  - 6
    - %1 is not a valid Win32 application Hi, We have a .net dll, which has a wrapper to command line tool. When we try to call we enocunter this error. When we execute the same command from command line it executes without error. Can anyone help us out with this problem? Following is the error we encounter. "d:\iw-home\Teamsite\bin\iwgetfilejobs "\default\main\APAC\English\Demo\WORKAREA\workarea\templatedata\ExternalContent\1IntelWeb\data\13190252\180313.xml" returns 1 : System.ComponentModel.Win32Exception: %1 is not a valid Win32 application at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo) at System.Diagnostics.Process.Start() at Intel.Ebusiness.Platform.Content.Workflow.CommandLineTool.Execute() " Tag: versions Tag: 95217
  - 7
    - Adding codebehind files to an app. developed using .net framework I made a site using a text editor and the .net framework..compiling it from the command line. I now have visual studio 2003 and want to alter the application from within it. Below is one such file, can someone give me an idea on this? <%@ Page Language="C#" %> <%@ Import Namespace="System.Data.SqlClient" %> <script runat="server"> void Page_Load (object Sender, EventArgs e) { } void makeselection_Click(Object sender, System.EventArgs e) { string col; string cat; string yea; string reg; string cou; string app; /*try { Session["color"] = color.SelectedItem.Text; } catch(System.Exception NotSelected) { Session["color"] = "-1"; } try { Session["category"] = category.SelectedItem.Text; } catch(System.Exception NotSelected) { Session["category"] = "-1"; } try { Session["year"] = year.SelectedItem.Text; } catch(System.Exception NotSelected) { Session["year"] = "-1"; } try { Session["region"] = region.SelectedItem.Text; } catch(System.Exception NotSelected) { Session["region"] = "-1"; } try { Session["country"] = country.SelectedItem.Text; } catch(System.Exception NotSelected) { Session["country"] = "-1"; } try { Session["appellation"] = appellation.SelectedItem.Text; } catch(System.Exception NotSelected) { Session["appellation"] = "-1"; } */ col = color.SelectedItem.Text; if (col!="") { Session["color"] = color.SelectedItem.Text; } else { Session["color"] = ""; } cat = category.SelectedItem.Text; if (cat!="") { Session["category"] = category.SelectedItem.Text; } else { Session["category"] = ""; } yea = year.SelectedItem.Text; if (yea!="") { Session["year"] = year.SelectedItem.Text; } else { Session["year"] = ""; } reg = region.SelectedItem.Text; if (reg!="") { Session["region"] = region.SelectedItem.Text; } else { Session["region"] = ""; } cou = country.SelectedItem.Text; if (cou!="") { Session["country"] = region.SelectedItem.Text; } else { Session["country"] = ""; } app = appellation.SelectedItem.Text; if (app!="") { Session["appellation"] = appellation.SelectedItem.Text; } else { Session["appellation"] = ""; } //Session["color"] = color.SelectedItem.Text; // Session["category"] = category.SelectedItem.Text; //Session["price"] = price.SelectedIndex; // Session["year"] = year.SelectedItem.Text; Response.Redirect("winelist.aspx"); } void emailoffer(Object sender, System.EventArgs e) { } </script> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="generator" content="Adobe GoLive"> <title>Untitled Page</title> <style type="text/css">  </style> <script language="JavaScript" type="text/JavaScript">  </script> </head> <body> <p align="center"><img src="e2.jpg" width="694" height="209"></p> <table width="81%" height="203" border="0"> <tr height="206"> <td width="54%" height="206"> <div align="center">Shop the largest online assortment of wines from around the world.From exciting new wines to monthly best sellers, you'll find greattasting wines for any occasion. </div></td> <td width="46%" height="206"><img src="top1.gif" width="229" height="170"></td> </tr> </table> <table width="769" border="0" cellpadding="0" cellspacing="0"> <tr> <td width="759"><hr noshade></td> </tr> </table> <p> </p> <form runat="server"> Category: <asp:DropDownList id="category" runat="server"> <asp:ListItem Text=""/> <asp:ListItem Text="Arneis"/> <asp:ListItem Text="Barbera"/> <asp:ListItem Text="Bordeaux"/> <asp:ListItem Text="Cabernet Sauvignon"/> <asp:ListItem Text="Chardonnay"/> <asp:ListItem Text="Coastal South Africa"/> <asp:ListItem Text="Colchagua"/> <asp:ListItem Text="Corvina"/> <asp:ListItem Text="Fortified Blend"/> <asp:ListItem Text="Fume Blanc"/> <asp:ListItem Text="Gamay"/> <asp:ListItem Text="Greco"/> <asp:ListItem Text="Malbec"/> <asp:ListItem Text="Marsanne"/> <asp:ListItem Text="Merlot"/> <asp:ListItem Text="Montepulciano"/> <asp:ListItem Text="Moscato"/> <asp:ListItem Text="Muscadet"/> <asp:ListItem Text="Nebbiolo"/> <asp:ListItem Text="Pauillac"/> <asp:ListItem Text="Pinot Blanc"/> <asp:ListItem Text="Pinot Bianco"/> <asp:ListItem Text="Pinot Grigio"/> <asp:ListItem Text="Pinot Gris"/> <asp:ListItem Text="Pinot Noir"/> <asp:ListItem Text="Primitivo "/> <asp:ListItem Text="Red Blend"/> <asp:ListItem Text="Rhone Valley"/> <asp:ListItem Text="Riesling "/> <asp:ListItem Text="Rose Blend "/> <asp:ListItem Text="Sake"/> <asp:ListItem Text="Sangiovese"/> <asp:ListItem Text="Sauvignon Blanc"/> <asp:ListItem Text="Semillon "/> <asp:ListItem Text="Shiraz"/> <asp:ListItem Text="Sparkling Blend "/> <asp:ListItem Text="Sweet Blend"/> <asp:ListItem Text="Syrah"/> <asp:ListItem Text="Tempranillo"/> <asp:ListItem Text="White"/> <asp:ListItem Text="White Blend"/> <asp:ListItem Text="Viognier"/> <asp:ListItem Text="Zinfandel"/> </asp:DropDownList> Region: <asp:DropDownList id="region" runat="server"> <asp:ListItem Text=""/> <asp:ListItem Text="Abruzzi"/> <asp:ListItem Text="Alsace"/> <asp:ListItem Text="Andalucia"/> <asp:ListItem Text="Bordeaux"/> <asp:ListItem Text="Burgundy"/> <asp:ListItem Text="California"/> <asp:ListItem Text="Campania"/> <asp:ListItem Text="Catalonia"/> <asp:ListItem Text="Coastal South Africa"/> <asp:ListItem Text="France"/> <asp:ListItem Text="Friuli-Venezia Giulia"/> <asp:ListItem Text="Languedoc-Roussillon"/> <asp:ListItem Text="La Rioja"/> <asp:ListItem Text="Loire Valley"/> <asp:ListItem Text="Lombardy"/> <asp:ListItem Text="Madeira"/> <asp:ListItem Text="Maule Valle"/> <asp:ListItem Text="Mendoza"/> <asp:ListItem Text="New South Wales"/> <asp:ListItem Text="Oregon"/> <asp:ListItem Text="Paarl"/> <asp:ListItem Text="Piedmont"/> <asp:ListItem Text="Puglia"/> <asp:ListItem Text="Rapel"/> <asp:ListItem Text="Rhone Valley"/> <asp:ListItem Text="Sake"/> <asp:ListItem Text="Sicily"/> <asp:ListItem Text="Southern"/> <asp:ListItem Text="South Island, NZ"/> <asp:ListItem Text="South Africa"/> <asp:ListItem Text="South Australia "/> <asp:ListItem Text="Trentino-Alto Adige"/> <asp:ListItem Text="Tuscany"/> <asp:ListItem Text="Veneto"/> <asp:ListItem Text="Vin de Pays"/> <asp:ListItem Text="Washington"/> <asp:ListItem Text="Western Australia"/> </asp:DropDownList> Country: <asp:DropDownList id=country runat=server> <asp:ListItem Text=""/> <asp:ListItem Text="Argentina"/> <asp:ListItem Text="Australia"/> <asp:ListItem Text="Chile"/> <asp:ListItem Text="France"/> <asp:ListItem Text="Italy"/> <asp:ListItem Text="Japan"/> <asp:ListItem Text="New Zealand"/> <asp:ListItem Text="Spain"/> <asp:ListItem Text="South Africa"/> Tag: versions Tag: 95198
  - 8
    - dumb question I just instaled Quickbooks 2005 - which requires .Net -- I hate it - but can't use the software w/o it. Is there any way to bypass the selection screen - since there is only one selection - me - on the computer - or must I sit here and wait to click my name before the computer will boot to the desktop? Any help - is most appreciated. Tag: versions Tag: 95192
  - 9
    - Serialization of enums Hello, i'm trying to serialize a class with a enum property...it seems to be serializing ok, but when i try to de-serialize it throw me an error like "[value] isn't valid for type [enum]". someone have done this before? i'm sorry by my english Tag: versions Tag: 95189
  - 10
    - TraceSwitch XML file error I am working through the Windows Applications with C# book by Amit Khalani for the 70-316 exam, I am using VStudio version 7.1.3088. In the chapter on Testing and Debugging there is an example where you are asked to do as follows..... "In Solution Explorer, select View All Files from the toolbar. Navigate to the bin\debug folder. Right-click and Add New Item. Choose to create an XML file and name the file StepByStep12_3.exe.config". You then add some xml code to specify a trace switch. The rest of the project is a basic Form with code that aims to demonstrate various levels of output from the TraceSwitch class by changing the value of the switch that was set in the XML file above. The following variable is declared in the Form... static TraceSwitch traceSwitch = new TraceSwitch("FactorialTrace", "Trace the factorial application"); I managed to do add the xml file to the debug folder after figuring out that you have to choose to select 'Include in the Project' for these normally hidden folders to be available in the IDE. However when I Build the project the new XML file is deleted and therefore the switch value is not picked up. Has anyone come across this behaviour? Maybe there has been a change since the book was written. I have downloaded the errata for the book from the Que website and there is nothing about this chapter being wrong. Tag: versions Tag: 95187
  - 11
    - Array of value-types Another question, related to my previous post: Is array of value types a value type or a reference type? From what I know it is a reference type in normal usage in .Net 1.0 and 1.1. Do you know of any case where it would become a value type? Maybe in .Net 2.0? Best regards Rafal Gwizdala Tag: versions Tag: 95185
  - 12
    - Struct with fixed-length array member - is it possible? Hello, Can you provide some hints on how would you solve a problem like this? I'm out of ideas... Here's the problem: Let's imagine a C structure containing a fixed-size array struct XYZ { int V1; int V2; double V3[50]; }; This structure, when allocated, occupies a contiguous block of memory (408 bytes in my compiler). Now I would like to have the same structure in C#, such that it would have THE SAME MEMORY LAYOUT as the C structure. The memory size does not need to be identical as in C, but the structure should occupy a single memory block and all data, including the array, should be placed in this block. There is no possibility in C# to declare a fixed-size array and to 'embed' it completely in a struct. When I make a declaration like this: public struct XYZ { int V1; int V2; double[] V3; } the V3 member is a reference to array object, not the array itself. Can you think of any way to get the C/C++ layout? Best Regards, Rafal Gwizdala Tag: versions Tag: 95184
  - 13
    - Monitor Exchange 2K queues I'm trying to Monitor my E2K queues, using C# and WMI I'm having a couple of problems. 1 - Exchange seems to dynamically create and destroy queues :( How does my Exchange Manager know the name of the queues, that it shows? 2 - After creating a class via the server browser, I can't figure out how to get ExchangeQueue.GetInstances() to work, when I'm working on a computer that is remote from the server. Any help? Any suggestions? (short of "Not possible") :) Thanks! Brian Hampson -- System Administrator that doesn't want to have to open 5 apps to monitor his network Tag: versions Tag: 95180
  - 14
    - Reflection GetObjectByStringReference(string) as object Hi I am searching for a method like this GetObjectByStringReference(ObjectName as string) as object E.g. Dim var1 as string = "Test" Dim O as object = GetObjectByStringReference("var1") Console.writeline("Value of O:" & O.ToString()) Should Output Test I need this to get detailed error logging information from my methods. I can get the Argument names my this code Dim _methodif As Reflection.MethodInfo = Reflection.MethodInfo.GetCurrentMethod Dim _param() As Reflection.ParameterInfo = _methodif.GetParameters() For Each _pi As ParameterInfo In _param MessageBox.Show(_pi.Name) Next What I need is to get the object reference of a variable by the name of the variable. I would figure that the databinding in asp.net does this? Please help.. Tag: versions Tag: 95177
  - 15
    - Free Balloon tool tip for .NET apps HerrLucifer's Balloon Tool Tip for .NET applications What uses will you have for a professional tool tip in your .NET applications? Now...download it for free at: http://www.freewebs.com/balloontooltip/ ---------- Thanks for any feedback... Send them to : hmdz105@[Removethis]hotmail.com Tag: versions Tag: 95173
  - 16
    - Databinding w/Update Hi All, I am under the impression that databinding allows a control to be updated automatically by the interface when the underlying value changes. However, many of my controls will not update after the initial display. If I have a boolean property and I bind it to a checkbox's checked property, I should be able to change the boolean from true to false and observe the checkbox go from checked to unchecked. Is there something else I should be doing or am I totally off-base? -- Thanks, Harry Tag: versions Tag: 95172
  - 17
    - Free Balloon tool tip for .NET apps HerrLucifer's Balloon Tool Tip for .NET applications What uses will you have for a professional tool tip in your .NET applications? Now...download it for free at: http://www.freewebs.com/balloontooltip/ ---------- Thanks for any feedback... Send them to : hmdz105@[Removethis]hotmail.com Tag: versions Tag: 95170
  - 18
    - Using XMLDocument.Load with a memory stream... I am looking for examples that would illustrate something similar to the following requirements: I am building an in-memory xml structure using the following as the setup and classes to perform this step: If fileOutput Then Dim XmlWriter As New XmlTextWriter("D:\QICS_MT\Debug Output\" & _ fileName, System.Text.Encoding.UTF8) XmlWriterXsdMultiLevel(regexObject, _ elementCollection, _ XmlWriter) Else Dim coreStream As New MemoryStream Dim XmlStreamWriter As New StreamWriter(coreStream,Text.Encoding.UTF8) Dim XmlWriter As New XmlTextWriter(XmlStreamWriter) XmlWriterXsdMultiLevel(regexObject, elementCollection, XmlWriter) End If If I take the upper branch I can successfully create and write the document and subsequently I can open the resulting Xml file and validate it against an external xsd file. I would like to be able to take the lower branch and create the same xml structure, yet in this instance I would like to be able to pass the created xml content to an XmDocument class, so that I can pass and use it elsewhere in the application. I am having problems understanding how to use the XmlDocument.Load(Stream) method, though I believe this is how I should do this. I have not found many examples of using this method, so I was looking for assistance in that area. Thanks, Tim Tag: versions Tag: 95168
  - 19
    - Match Blank Characters outside Multiline Comments Hi, all, I'm now writing a program to compress JavaScript code. One puzzle is how to write a regular expression to find out and remove all the redundent blank spaces. However, those blank spaces that are in the comments should be kept intact. I've tried to write some Regexs, and I list them here for your information: regex = new Regex(@"/\*[\s\S]*?\*/"); // pattern used to match a multiline comment block regex = new Regex(@"//[^@\n]*\n"); // pattern used to match a single-line comment regex = new Regex(@"(?<!(?://[^\n]*))\s+"); // pattern used to match blank characters outside single-line comments Now the problem is how to match all the continuous blank characters outside multiline comments? I tried the following Regex: regex = new Regex(@"(?<!(?:/\*[\s\S]*))\s+"); but this does not work, and will lead to a CPU dead-loop with no reactions for a long time. I'm a newbie in Regular Expression. Can sombody help me? Thanks a lot! Best regards, Laser Lu Tag: versions Tag: 95162
  - 20
    - Security Exception Hello, I took over a little c#-command-line-programm(connect a db and creates a cvs-file) for upgrading. I always get a security exception when I`m running it from the network on other clients. developer-machine: all works fine- from local and from network. on client-machines: it works locally, but from network I get the security exception I tried to set a lower security-level, and registrated the assembly at the client, but no solve. what am I doing wrong, or what I have to do, for starting the exe from any client without security exception. the "original"-exe does it! any suggestions? best regards tommy Tag: versions Tag: 95161
  - 21
    - Error When Interop'ing to COM+ Managed Object with Library Activation I have a remoting server that is on the same local box as a COM+ managed object with Library Activation. When I try to activate the object from the remoted assembly, I get the following error: "The specified activation could not occur in the client context as specified." The security context of the service application that is activating the object has the proper credentials. It's been years since I've had to deal with COM+ and I'm a bit rusty. Is there some magic that I have to perform to get this interop to work? Thanks, Matt Dinovo dinovom [at] gmail.com Tag: versions Tag: 95151
  - 22
    - HttpWebRequest & SSL problems I have a HttpWebRequest connecting to a SSL server. The server has a valid Verisign certifcate installed, so no client-side cert is needed. I am getting intermittent errors when connecting to the server. One in every five times I try to connect, I see the error: "The underlying connection was closed: Could not establish secure channel for SSL/TLS.)" I tried using a ICertificatePolicy to allow any certificate, but that didn't work. The funny thing is when I load my own certificate using: request.ClientCertificates.Add(X509Certificate.CreateFromCertFile("mycert.cer")); ...I never see the error. However, I don't want to ship the app with a client cert. Suggestions? Tag: versions Tag: 95149
  - 23
    - How to get a keypress event in an console application This is a multi-part message in MIME format. --------------030807030301030001030006 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit I use to get the function keys that were pressed in an console application cause this application should also be used over a telnet server. Does someone know how to get the keys. I already thought about p-invoke, but which function do i need and were can i get a reference of user32.dll Thanks for your help in advance. -- Ulrich new to to object orientated programming, experienced in 16bit and DOS ^^ --------------030807030301030001030006 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> I use to get the function keys that were pressed in an console application cause this application should also be used over a telnet server. <br> Does someone know how to get the keys. <br> I already thought about p-invoke, but which function do i need and were can i get a reference of user32.dll<br> Thanks for your help in advance. <br> <div class="moz-signature">-- <br> <meta content="text/html;" http-equiv="Content-Type"> <title></title> <font color="#999999">Ulrich <br> new to to object orientated programming, experienced in 16bit and DOS ^^</font><br> </div> </body> </html> --------------030807030301030001030006-- Tag: versions Tag: 95148
  - 24
    - get picture from oracle I use the following code for getting a picture from oracle: OraCon.Open(); // define the sql to perform the database insert string sqlStmt = "select foto from ov_portal_foto"; // Establish a new OracleCommand OracleCommand cmd = new OracleCommand(); // Set command to create your SQL statement cmd.CommandText = sqlStmt; // Set the OracleCommand to your database connection cmd.Connection = OraCon; // Set the command type to text cmd.CommandType = CommandType.Text; // Execute the SQL Statement OracleDataReader oraReader = cmd.ExecuteReader(); if ( oraReader.Read()) { Response.BinaryWrite( (byte[]) oraReader["foto"] ); } //ImageDataGrid.DataSource = oraReader; //ImageDataGrid.DataBind(); } catch(OracleException ex) { Label1.Text = ex.Message; Label1.Visible = true; Now when I run the code i see the following error: Specified cast is not valid. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidCastException: Specified cast is not valid. Source Error: Line 47: if ( oraReader.Read()) Line 48: { Line 49: Response.BinaryWrite( (byte[]) oraReader["foto"] ); Line 50: } Line 51: What am I doing wrong? thanks in advance Tag: versions Tag: 95145
  - 25
    - .resx record count ? I want to quickly get a count of the number of entries in a resource file (.resx). Using a ResXResourceReader and counting manually seems extremely slow. Is there a quicker way ? Tag: versions Tag: 95143
- Next
  - 1
    - String.Empty vs. string literal Anybody have a definitive, backable answer to which version performs better: String.Empty vs. ""? Given: private void TestEmptyObject ( string value ) { int nCt = 0; if (value == String.Empty) ++nCt; } My experiments show that they are equivalent except for String.Empty is loaded through ldsfld and "" is loaded through ldstr. They both eventually call String.Equality(string, string) which will treat them the same. My rule is to use "" because to me it is clearer to read. Anybody have a really good reason why String.Empty should be used instead? Of course I'm only talking about a single language here. Understandably String.Empty is useful when trying to represent an empty string in a (programming) language neutral way but this is rare. Thanks, Michael Taylor - 4/18/05 Tag: versions Tag: 95142
  - 2
    - String Concat vs. Plus operator Does anybody have a definitive, backable answer to which way is better when concating strings (String.Concat vs. +). You can easily prove one faster than the other in contrived examples. I'm interested in real-world examples. My experiments have shown that both versions are equivalent. Given: void TestStringOp ( string value1, string value2, string value3 ) { string result = value1 + " " + value2 + " and " + value1 + " " + value3; } void TestStringConcat ( string value1, string value2, string value3 ) { string result = String.Concat(value1, " ", value2, " and ", value1, " ", value3); } Dumping the IL for TestStringOp reveals that this is converted to the equivalent of this: string[] temp = new string[] { value1, " ", value2, " and ", value1, " ", value3 }; string result = String.Concat(temp); Dumping the IL for TestStringConcat reveals that the exact same code is generated. Therefore the performance is identical. The bad thing about this is that internally String.Concat will allocate another string array and copy the strings into it before finally calling the fast string allocator. The only time I think Concat is a better choice is when the # of strings to concat is 4 or less. In this case the optimized version of the concat routine is called. Therefore my running rule is that if concatenating 4 or less strings then use String.Concat otherwise it doesn't matter. Understandably timing this code won't be very revealing since the optimizer will probably get rid of all the code anyway but by comparing the IL I should be able to overlook the optimizations that will be done. Anybody have definitive, backable answers to this? Thanks, Michael Taylor - 4/18/05 Tag: versions Tag: 95140
  - 3
    - add new row to access in vb.net i want to add new row to access when the parameters are TinyInt and in the access the types are int so - what should i cange in order to add the row? thanks Tag: versions Tag: 95137
  - 4
    - Read/Set a variable value declared in a function from another function Dear All, Is it possible to Read/Set a variable value declared in a function from another function? f.e.x. public bool myFunction() { int cost; string ProductName; Getvalues ("Select cost, ProductName into :cost, :ProductName"); } Getvalues(string Sql) { ... } How do I set or read the variables cost & ProductName from function Getvalues? The function is passed only the names of the variables...please help... TALIA Many regards Jack Tag: versions Tag: 95136
  - 5
    - New Website Covering .Net Technologies Visit http://www.dotnetmatters.com - DotNet Matters - for articles on ASP.Net, Sharepoint, sql server and other Microsoft.Net Technologies. Tag: versions Tag: 95133
  - 6
    - Changed functionality in system.directoryservices ver. 1.1.4322.20 Dear all, we have the following problem. We like to update a LDAP diretory using system.directoryservices. This worked fine in the past but now it stopped working, we get a System.NotSupportedException. We use the following syntax: <DirectoryEntry>.Properties[<attribute>][0] = <value>; Further research turned out that this does work using system.directoryservices.dll 1.1.4322.573 but doesn't work using version 1.1.4322.2032. To investigate the difference I used Reflector (c# disassembler). I found the following code (for set_item) in version 1.1.4322.2032: if (this.needNewBehavior && !this.allowMultipleChange) { throw new NotSupportedException(); } base.List[index] = value; Version 1.1.4322.573 doesn't has this "if" criteria, it simply sets the value. If I look at the values using the debugger I see that this.allowMultipleChange is false and needNewBehavior is true, therefore I get a NotSupportedException(). So now I have a huge problem: I can't update my LDAP anymore. Can anybody help me with this problem? Or does anybody know where I can find documentation about the differences in the different releases of a dll? Or does anybody know where I can find system.directoryservices newsgroups? Or does anybody know how to contact miscrosoft about this matter (somebody must have changed the code for some reason without documenting it)? Thanks, RenÃ© Tag: versions Tag: 95131
  - 7
    - ANN: Visual Studio 2005 and .NET 2.0 Beta 2 Visual Studio 2005 Beta 2 http://lab.msdn.microsoft.com/vs2005/ Get http://lab.msdn.microsoft.com/vs2005/get/ Order http://msdn.microsoft.com/getthebetas/ Go-Live License http://lab.msdn.microsoft.com/vs2005/golive Express Editions Beta 2 http://lab.msdn.microsoft.com/express/ .NET Framework 2.0 SDK Beta 2 x86 http://www.microsoft.com/downloads/details.aspx?FamilyID=41070791-8912-4f94-ac46-7ce0e386d5c9 .NET Framework Version 2.0 Redistributable Package Beta 2 (x86) http://www.microsoft.com/downloads/details.aspx?FamilyID=7abd8c8f-287e-4c7e-9a4a-a4ecff40fc8e -- Thomas Scheidegger - MVP .NET - 'NETMaster' http://www.cetus-links.org/oo_dotnet.html - http://dnetmaster.net/ Tag: versions Tag: 95130
  - 8
    - Help! What is wrong here ? I am trying to pass a filename or file location to a stored proc and am getting an SqlException. I am using C# in .NET with SQL 2000. I believe the error is in the line where I set the value but then again what do I know? Here is part of my code: SqlCommand myCommand = new SqlCommand("sp_test", myConnection); myCommand.CommandType = CommandType.StoredProcedure; SqlParameter myParam = new SqlParameter("@xmlFile", SqlDbType.Text, 1000); myParam.value = "c:\\test.xml"; myCommand.Parameters.Add(myParam); myConnection.Open(); try { myCommand.ExecuteNonQuery(); etc etc It gets an error at the above execution point with the error: SqlException: System.Data.SqlClient.SqlError: XML Parsing error: Invalid at the top level of the document. I think I need to give it some command where I specify the value to say find the location of the file...... Why is is so difficult to pass a filename or location of file to a SPROC ? Please help! LW Tag: versions Tag: 95128
  - 9
    - plugging into the explorer shell hi all, would appreciate if somebody can show me how to write a module in .NET (C#) to plug into the file explorer shell. how do i add a "node" similar to the "control panel" in the file explorer ? thanks, Tag: versions Tag: 95124
  - 10
    - Regular expression captures Hi, From the following string I would like to capture text. String: This action has been executed via Console First of all I like to know if this is the text I need: it must contain "This action has been executed via". Secondly I would like to know "Console" How can Regular expressions help me in this. I've tried various things with the RegEx class but I'm having troubles retrieving "Console". The match.Captures collection always seems to contain the string searched, not only the captured part. RegEx r = RegEx( "This action has been executed", RegExOptions.IgnoreCase) if (r.Matches( myString).Count > 0) { Here matches are found and r.Matches[0].Captures.Count > 0. Why is ...Captures.Count > 0, I did ask for a capture? } RegEx q = RegEx( "(C\w+)", RegExOptions.IgnoreCase) if (q.Matches( myString).Count > 0) { Here matches are found and r.Matches[0].Captures.Count > 0. This is where I expected the capture!! } regards, Erik Tag: versions Tag: 95118
  - 11
    - How to tell if running in console or winexe mode? Is there anyway to tell from within your code, either at compile-time or run-time your assembly is running as a console app (exe) or windows gui app (winexe)? I wanted to for example create simple beep() and msgbox() functions that work differently in either mode. Tag: versions Tag: 95109
  - 12
    - CurrentContext to set a variable value in a function or class Dear All, We are developing a Windows application where programmers write sql statement and pass their variables in a : separated format to my function...after executing the query...my class should set the variables to its values...how do I achieve this? Can I use thread.CurrentContext? Do all my classes need to be derived from ContextBoundObject? f.e.x. class SqlHandle { public bool executeQuery (Context oContext, string Sql) { ... } } class myForm { public getValues() { string name = ""; int age = 0; SqlHandle oSqlHandle = new SqlHandle(); oSqlHandle.executeQuery(thread.CurrentContext, "Select Name, age FROM TblPerson INTO :name, :age;"); } } How do I achieve this functionality? Please help... TALIA Many regards Jack Tag: versions Tag: 95106
  - 13
    - Code isolation with the AppDomain class I am responsible for the plugin-loading part of an app. One of the things the loader has to do is check licensing, and unload any unlicensed plugins. I naively did this as: AppDomain Sandbox = AppDomain.CreateDomain("Sandbox"); try { Assembly Suspect = Sandbox.Load(PluginName); // do some tests on Suspect.GetExportedTypes() } finally { AppDomain.Unload(Sandbox); } The code seemed to work, but it turns out that Sandbox.Load(PluginName) is actually loading the PluginName into both the Sandbox AppDomain and the default AppDomain. When I unload Sandbox, I'm left with all tested plugins still loaded into the default AppDomain, whether they are licensed or not. I do NOT want to execute any assemblies: I just want to load my suspects; do some tests in the temp AppDomain; and return the test results to the default AppDomain. It looks like my only option is to use AppDomain.DoCallBack to execute my tests, and use SetData to store the results. Is there a better way? -- www.midnightbeach.com Tag: versions Tag: 95100
  - 14
    - Removing .NET Framework 1.0 Can .NET Framework 1.0 and Hotfix 1.0 be removed from the Control Panel after 1.1 and 1.1 hotfix have been installed? Are there any things to watch out for if/when you uninstall 1.0? Howard H. Tag: versions Tag: 95096
  - 15
    - XP Burn - Corrupted Files Hello Fellow Coders, I am trying to use the free XPBurn assembly from the Microsoft website. After ironing a few bugs out, I finally got it write to a CD. However, all the files appear to be corrupt. The executables that were burned are not valid Win32 applications, the text files appear like binary data has been written to them. I have noticed in the posts that a few of you have managed to get it to work. Did you come across this problem? If so, how do you fix it? L. Tag: versions Tag: 95087
  - 16
    - Finding types inside a method body dynamically How to find types referenced inside a method body dynamically in .Net. I mean If I have a class "A" and it has a method "Method1". "Method1" references object of class "B" (i.e there is an object created for Class "B" in "Method1".). Hod do I find out the object of Class "B" in "Method1" dynamically in .net Tag: versions Tag: 95077
  - 17
    - Passing XML FileName to a Stored Proc I have created a stored procedure to use OPENXML to update my SQL2000 database using an external XML file. What I need help on is: How to pass the XML file as a parameter to the stored procedure. Do I call SqlParameter ? If yes, besides the file name, it wants to know the dbType and size. Can someone post the C# code to do that ? Thanks in advance, LW Tag: versions Tag: 95073
  - 18
    - Updating Service Installers This is a question from the automated practice test that comes with the Micrsoft MCSD boxed set of books. I think it's wrong. You create a Windows Service that connects to a SQL Server data source when a user logs on. You find that because of network problems the client application disconnects from the data source. You need to change the Windows Service so that it checks the connection every five minutes and reconnects to the data source if the connection is broken. You need to add this functionality to the Windows Service, so you uninstall the service add the functionality. You then rebuild and reinstall the service. However, when you run the service, you cannot see the newly added functionality. Which of the following tasks should you perform to view the new functionality? (Choose one correct option.) 1) Update the existing installers, and then rebuild the service application. 2) Debug the service, and find out why you cannot view the functionality. 3) Remove the existing installers, add new installers, and then rebuild the service aplication. 4) Verify the permissions for the security context, and then rebuild the service application. Answer: 3 (???) What does removing the installers do? If you look at the code in the studio-generated installers, it just consists of basic properties like the service name and the account. Why would removing the installers and adding identical installers have any impact at all? Tag: versions Tag: 95072
  - 19
    - .NET SP1 messed up... Hi... I recently installed .NET1.1 SP1 from the windows update website (this cannot be uninstalled). Also installed MS Installer 3.1, which I uninstalled now, after facing problems in VStudio. This is what happened: I had a solution with several projects and a setup project. After installing .NET1.1 SP1, whenever I start to 'Build' the setup project, it stops after the first line: <i>------ Starting pre-build validation for project 'Setup' ------ ------ Pre-build validation for project 'Setup' completed ------ ------ Build started: Project: Setup, Configuration: Debug ------ Building file 'C:\...\Visual Studio Projects\Project1\Setup\Debug\Setup.msi'...</i> Then MSIEXEC.EXE shows up in the task manager process list - It now comes up with a dialog saying it is looking for VS .NET 2003 installation vs_setup.msi file. I have to cancel out of this dialog so the 'Build' can proceed. However, this problem remains even after I uninstalled MS Installer 3.1. So something must be wrong with SP1. Anybody knows about any problems with .NET1.1 SP1? Is there a fix for this? Can I get rid of SP1 if I reinstall .NET1.1? TIA Dumbo DotNet Tag: versions Tag: 95063
  - 20
    - Error executing child request Hi, I am transferring control to an asp page and thats when I get this error... myasp.aspx.... Server.Transfer("xyz.asp") any clue? Tag: versions Tag: 95060
  - 21
    - .Net framework installed hotfixes How can I determine which hotfixes are installed for a specific version of the .Net Framework? Tag: versions Tag: 95054
  - 22
    - Re-installing .netframework on Windows 2000 Server SP4 Removed the .netframework to clear up issues caused by installing IIS over top. I tried re-installing manually and via windows update and receive this error in the windows update log: Error IUENGINE See iuhist.xml for details: Install finished (Error 0x80071FFF) iuhist.xml: <installStatus value= "FAILED" needsReboot="1" errorCode="-2147016705"/> Does anyone have any ideas? Tag: versions Tag: 95052
  - 23
    - How to start ASP.NET web server? I get this message in VS.NET when opening an ASP.NET web application that was created on another machine: VS.NET has detected that the specific web server is not running ASP.NET v1.1. You will be unable to run ASP.NET web applications or services. The ASP.NET State Service is running but I receive this error when starting the ASP.NET Admin Service: Could not start the ASP.NET Admin Service service on Local Computer. Error 2: The system cannot find the file specified. Any idea how I get the web server going that allows aspx pages to render? Thanks, Brett Tag: versions Tag: 95048
  - 24
    - GC, Should I care? I am trying to track a suspected memory leak in an application I'm writing and through repeated simplification of my project, I have found the following which is quite easily replicated should you be prepared to give me 5 minutes of your time... Create a new C# (Probably the same in VB dotNET but I've not tried it) Windows application with 2 forms, the default form -Form1 and one other one. that has a bunch of controls on it (say 20 buttons, 20 labels and a DataGrid) - Form2. On the default form, add a button to display the second form with some code like: private void button1_Click(object sender, System.EventArgs e) { using (form2 formTwo = new form2()) { form2.ShowDialog(); } } also on Form1 add a label, and a timer that updates the label text as follows (updates every 5 seconds -Interval = 5000-): private void timer1_Tick(object sender, System.EventArgs e) { label1.Text = GC.GetTotalMemory(False); } and finally a button that forces a Garbage Collection: private button2_Click(object sender, System.EventArgs e) { GC.Collect(); } OK, my question/query is this, if I repeatedly click the button to open the second form, then close the second form, click the button, close the form etc. about 20-30 times, the display of GetTotalMemory seems to keep going up, and even after forcing Garbage Collections, never seems to get fully reclaimed. Should I care? and if I should, what (if anything) can I do about it? I would really appreciate an answer from someone who understands these things... Thanks a lot, Chris. Tag: versions Tag: 95040
  - 25
    - GC, Should I care? Hi, I am trying to track a suspected memory leak in an application I'm writing and through repeated simplification of my project, I have found the following which is quite easily replicated should you be prepared to give me 5 minutes of your time... Create a new C# (Probably the same in VB dotNET but I've not tried it) Windows application with 2 forms, the default form -Form1 and one other one. that has a bunch of controls on it (say 20 buttons, 20 labels and a DataGrid) - Form2. On the default form, add a button to display the second form with some code like: private void button1_Click(object sender, System.EventArgs e) { using (form2 formTwo = new form2()) { form2.ShowDialog(); } } also on Form1 add a label, and a timer that updates the label text as follows (updates every 5 seconds -Interval = 5000-): private void timer1_Tick(object sender, System.EventArgs e) { label1.Text = GC.GetTotalMemory(False); } and finally a button that forces a Garbage Collection: private button2_Click(object sender, System.EventArgs e) { GC.Collect(); } OK, my question/query is this, if I repeatedly click the button to open the second form, then close the second form, click the button, close the form etc. about 20-30 times, the display of GetTotalMemory seems to keep going up, and even after forcing Garbage Collections, never seems to get fully reclaimed. Should I care? and if I should, what (if anything) can I do about it? I would really appreciate an answer from someone who understands these things... Thanks a lot, Chris. Tag: versions Tag: 95039

how many versions of dotnet can I run?
Should I uninstall 1 and 1.1 and install beta 2?

--

D@nnyBoy

Re: versions by Danny

Danny
Tue Apr 19 14:05:04 CDT 2005

D@annyBoy wrote:
> how many versions of dotnet can I run?
> Should I uninstall 1 and 1.1 and install beta 2?

They'll all run alongside each other, but you do need to uninstall any
previous beats (eg. beta 1) of .net 2.0!

--
Danny

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Re: versions by D

D
Tue Apr 19 18:21:12 CDT 2005

thanks for the response
uninstalled version 1.1 plus update
and install beta 2
net applications running so far

--

D@nnyBoy
Have you tried posting your problems
not related to MS AntiSpyware to
news://msnews.microsoft.com

and please don't bother to send me private mail
because I don't check my mailbox regularly

"Danny T" <danny@nospam.oops> wrote in message
news:4265565e$0$561$ed2619ec@ptn-nntp-reader03.plus.net...
> D@annyBoy wrote:
>> how many versions of dotnet can I run?
>> Should I uninstall 1 and 1.1 and install beta 2?
>
> They'll all run alongside each other, but you do need to uninstall any
> previous beats (eg. beta 1) of .net 2.0!
>
> --
> Danny

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