Update a gridview with values from another table using a drop down list

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I am using ASP.Net 4.0 in Visual Studio 2010. I have two tables in my database 'registration'- table1 ==" Users" which has a column called usertype and table 2=="Requests" which has a column called assigned_to.

What I intend to do is:- when the
page loads the grid view is shown and when I click the edit command, the assigned_to column contains a dropdown list showing all the values from the firstname column of Users where Usertype='facilitator'.

Now when I click the value in the drop down list and then click update the values in the grid view do not get updated. I am not using any code in the C# file. I am just using the edit template feature of the grid view.

please could any body help?

Posted 21-Jul-13 20:33pm

User 9414576

Updated 21-Jul-13 20:41pm

Thanks7872

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jaideepsinh 22-Jul-13 2:37am

I think you have to use update panel.Do you try that?Paste you code here if you did.

[no name] 22-Jul-13 4:23am

i tried the update panel... didn't work

jaideepsinh 22-Jul-13 6:09am

Paste you code here if you did.

Thanks7872 22-Jul-13 2:43am

I am not using any code in the C# file. Why?

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vinayoukuri · Accepted Answer · 2013-07-21T20:44:00

Solution 1

You need to use RowCommand event of the grid and write the update logic in code behind file.

Posted 21-Jul-13 20:44pm

vinayoukuri

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[no name] 22-Jul-13 4:26am

could you help me with the code for the RowCommand function?

vinayoukuri · Accepted Answer · 2013-07-22T01:27:00

<asp:gridview id="GridView1" datasourceid="MyDataSource" datakeynames="Code" xmlns:asp="#unknown">
AutoGenerateColumns="false" runat="server">
<columns> <asp:commandfield buttontype="Link" showeditbutton="true" showcancelbutton="true">
<asp:boundfield datafield="Code" headertext="Code">
<asp:boundfield datafield="Name" headertext="Name">
<asp:boundfield datafield="Description" headertext="Description">

<asp:sqldatasource id="MyDataSource" xmlns:asp="#unknown">
ConnectionString="<%$Connectionstrings:ERPConnectionString%>"
SelectCommand="SELECT * FROM Sample"
UpdateCommand="Update SAMPLE SET Name=@Name,Description=@Description Where Code=@Code"
DeleteCommand="Delete SAMPLE Where Code=@Code" runat="server"/>

-------- The above way is when you sepcify soruce also in the grid, From your question if you are not doing any coding in c# Code you should be using something similar to one above. Please note the '