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Old December 11th, 2006, 09:51 PM
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Default SQLDataSource row count

I am a newbie to ASP.NET 2.0, and until I 'find my feet' with this new stuff I am using Visual Web Developer, with C# as my scripting language. I hope this is the most suitable forum for this question, but if not feel free to move it to a more appropriate forum.

I have a gridview bound to a SQLDataSource (let's call it MyData), which connects to a SQL-server back-end. If MyData contains rows I want the grid to display the rows, but if MyData contains no rows, I want to display a message. Something like this...

<% if (MyData.Tables(0).rows.count>0) {%>
    <asp:Gridview id="MyGrid" DataSourceID="MyData" ...
<% } else {%>
    <asp:Label id="Label1" runat="server" Text="Sorry, no records selected"></asp:Label>
<% }%>

When I run the code I get the following
 Compiler Error Message: CS0117: 'System.Web.UI.WebControls.SqlDataSource' does not contain a definition for 'Tables'.

On further reading it appears that MyData.Tables(0).rows.count only works if MyData is a dataset.
Q. How do I select records into a dataset instead of a SQLDataSource? (Is this the same as ADO.net?)
Q. How do I bind a DataSet to the grid?
Q. What would be the equivalent solution for determining a row count using a SQLDataSource?


How can I get the numer of rows in the datasource? I think I can use MyGrid.Rows.Count to obtain the number of rows in the grid, but I want to refer to the datasource elsewhere in the page, so I would rather know how to get the row-count from the datasource itself.

As I get into ASP.net more, and to make my code more modular, I can see myself wanting to get data data via C# functions instead of asp:SqlDataSource commands (with filter parameters passed as function parameters). Is SQLDataSource the best way to go in this case, or would datasets be more efficient and/or easier to program?

Any help would be appreciated.

Alan

 
Old December 27th, 2006, 03:23 PM
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Default

The recommendation is to use the Event Handler for the Selected Event for SqlDataSource.

Protected Sub SqlDataSource1_Selected(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceStatusEvent Args) Handles
SqlDataSource1.Selected

  Label1.Text = String.Format("rows count: {0}", e.AffectedRows)

End Sub

I am looking answer for the same question.

I found it on:

http://www.velocityreviews.com/forum...atasource.html

Posted by: Daniel TIZON, MCP - MCSD.NET - MCT

Hope it helps.

--- CODING UNKNOWINGLY
http://codingunknowingly.blogspot.com
 
Old December 29th, 2006, 08:20 PM
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Hi CodingUnknowingly,

Thanks for your reply.

Regards,
Alan

 
Old June 5th, 2010, 06:02 AM
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Thanks for your reply





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