获取ASP.net C＃中Gridview中的列的值/文本以显示在标签中

Question

I have a gridview that has a list of Salesman names. When a Salesman is selected using A ButtonFieldTemplate in the Grid . I need the name of selected Salesman to appear in a Label .

So far I have this but it is not working:

protected void gvSalesmanByManager_SelectedIndexChanged(object sender, EventArgs e) 
{ 
    lblSalesmanCustomers.Text = gvSalesmanByManager.SelectedValue + "'s Customers"; 
} 

It's not throwing any errors. Not even red squiggly lines in Visual Studio. It's just plain not working.

How can I accomplish this in ASP.net and C# 4.0.

Answer 1

Regarding to the documentation SelectedValue gets the data key value of the selected row in a GridView control. Does your GridView contain a column with the key and did you set the dataKeyNamesProperty (such as datakeynames="myID")?

EDIT: To access a value of a column you can use SelectedRow:

GridViewRow row = GridView1.SelectedRow;
lblSalesmanCustomers.Text = row.Cells[2].Text;

EDIT2: There are two options when you want to read the template field. Either you store your value in an additional invisible column or you access the controls inside the template field. Something like this should work:

lblSalesmanCustomers.Text = ((TextBox)row.Cells[2].FindContol("tbxName")).Text;

Answer 2

Make sure you are not assigning empty text on page load event. or you need to place those initialization in if(!Page.IsPostback) block

Answer 3

My code so far : protected void gvSalesmanByManager_SelectedIndexChanged(object sender, EventArgs e) { lblSalesmanCustomers.Text = gvSalesmanByManager.SelectedValue + "'s Customers"; } –

try in the event "gvSalesmanByManager_SelectedIndexChanged" following code:

lblSalesmanCustomers.Text = gvSalesmanByManager.SelectedRow.Cells[0].Text;

You said something about a "ButtonFieldTemplate" please show me some code from your ascx-file this will help us much i think.

*Edit: "Controls[1]" has not to be right. But 0 is a literal. you could also debug your code and set breakpoints. would be much easier. try this with Linkbutton: LinkButton lnk1 = gvSalesmanByManager.SelectedRow.Cells[0].Controls[1] as LinkButton; lblSalesmanCustomers.Text = lnk1.Text;

best regards, noone