Parameter value not passing to datasource from code behind

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Hi all,
I have a gridview with selectcommand as storedprocedure .I want to pass a parameter value to SP from code behind during a buttonclick .However the value is not passing.Any help will be really appreciated.Thanks in advance.

What I have tried:

<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:EMPYHT_ConnectionString %>"
SelectCommand="SPGETNAMES" SelectCommandType="StoredProcedure"><SelectParameters>
 <asp:Parameter Name="tnid" Type="String" DefaultValue="" />
   </SelectParameters>
  </asp:SqlDataSource>

protected void but_mep_Click(object sender, EventArgs e)
      {
          string tende=Session["TENDER"].ToString();
          SqlDataSource2.SelectParameters["tnid"].DefaultValue = tende;
          grd_tendermedicineslist.DataBind();
          upnl_editquo.Update();
       }

Posted 31-Jul-18 5:48am

Member 12926744

Updated 4-Aug-18 9:18am

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Alek Massey 31-Jul-18 14:47pm

You've checked the session value is returning what you expect?

2 solutions

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Vincent Maverick Durano · Answer 1 · 2018-07-31T08:51:00

First off, have you tried debugging your code by setting a break point at your Button Click event for you to verify it it hits there? If it hits, then step into your code and see the value of Session.

Second, when referencing a value from Session object make sure to check for null first to avoid unexpected error. For example:

C#

if(Session["TENDER"] != null){
          string tende= Session["TENDER"].ToString();
          SqlDataSource2.SelectParameters["tnid"].DefaultValue = tende;
}

Third, if you are passing Session value for your Select command, then you can try using the SessionParameter instead. For example:

ASP.NET

<selectparameters>
		<asp:sessionparameter name="ID" sessionfield="Tender" type="Int32" />
</selectparameters>

akash dhonde · Answer 2 · 2018-08-04T09:19:00

Solution 2

https://www.aspsnippets.com/Articles/Bind-data-to-ASPNet-GridView-using-Stored-Procedure.aspx

Try this hope your problem will be solved with this

Posted 4-Aug-18 9:19am

akash dhonde