How to determin if a datarow has already been added to a datatable yet.

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using .net 3.0 and c#, I have a public datarow from a strongly typed dataset
datatable. the datarow gets created using the method
myTable.NewmyTableRow(), but doesn't get added to the table until later. At
some point later, is there a quick and easy way determine if the datarow has
already been added to the datatable yet?

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moondaddy@newsgroup.nospam
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RE: How to determin if a datarow has already been added to a datatable yet. by jetan

jetan
Wed Jun 18 21:07:09 CDT 2008

Hi George ,

You may check the DataRow.RowState property. The value of
DataRowState.Detached means that the DataRow is created but is not added
into the DataRowCollection yet, while DataRowState.Added means the row is
already added. See the link below for more details:
http://msdn.microsoft.com/en-us/library/system.data.datarowstate.aspx

As an example, the following code snippet will generate the following
output:

"Detached
Added

Detached
Added

Detached
Added

Detached
Added

Detached
Added
"

DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("column1", typeof(int)));
dt.Columns.Add(new DataColumn("column2", typeof(string)));

for (int i = 0; i < 5; i++)
{
DataRow dr = dt.NewRow();
dr["column1"] = i;
dr["column2"] = "item" + i.ToString();

Console.WriteLine(dr.RowState.ToString());

dt.Rows.Add(dr);

Console.WriteLine(dr.RowState.ToString() + Environment.NewLine);
}

Hope it helps.

Best regards,
Jeffrey Tan
Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
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Re: How to determin if a datarow has already been added to a datatable yet. by moondaddy

moondaddy
Thu Jun 19 02:05:18 CDT 2008

Thanks this was perfect.


""Jeffrey Tan[MSFT]"" <jetan@online.microsoft.com> wrote in message
news:V7Vw4Eb0IHA.3644@TK2MSFTNGHUB02.phx.gbl...
> Hi George ,
>
> You may check the DataRow.RowState property. The value of
> DataRowState.Detached means that the DataRow is created but is not added
> into the DataRowCollection yet, while DataRowState.Added means the row is
> already added. See the link below for more details:
> http://msdn.microsoft.com/en-us/library/system.data.datarowstate.aspx
>
> As an example, the following code snippet will generate the following
> output:
>
> "Detached
> Added
>
> Detached
> Added
>
> Detached
> Added
>
> Detached
> Added
>
> Detached
> Added
> "
>
> DataTable dt = new DataTable();
> dt.Columns.Add(new DataColumn("column1", typeof(int)));
> dt.Columns.Add(new DataColumn("column2", typeof(string)));
>
> for (int i = 0; i < 5; i++)
> {
> DataRow dr = dt.NewRow();
> dr["column1"] = i;
> dr["column2"] = "item" + i.ToString();
>
> Console.WriteLine(dr.RowState.ToString());
>
> dt.Rows.Add(dr);
>
> Console.WriteLine(dr.RowState.ToString() + Environment.NewLine);
> }
>
> Hope it helps.
>
> Best regards,
> Jeffrey Tan
> Microsoft Online Community Support
>
> Delighting our customers is our #1 priority. We welcome your comments and
> suggestions about how we can improve the support we provide to you. Please
> feel free to let my manager know what you think of the level of service
> provided. You can send feedback directly to my manager at:
> msdnmg@microsoft.com.
>
> ==================================================
> Get notification to my posts through email? Please refer to
> http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif
> ications.
>
> Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
> where an initial response from the community or a Microsoft Support
> Engineer within 1 business day is acceptable. Please note that each follow
> up response may take approximately 2 business days as the support
> professional working with you may need further investigation to reach the
> most efficient resolution. The offering is not appropriate for situations
> that require urgent, real-time or phone-based interactions or complex
> project analysis and dump analysis issues. Issues of this nature are best
> handled working with a dedicated Microsoft Support Engineer by contacting
> Microsoft Customer Support Services (CSS) at
> http://msdn.microsoft.com/subscriptions/support/default.aspx.
> ==================================================
> This posting is provided "AS IS" with no warranties, and confers no
> rights.
>
>


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