Can't catch Datagrid event! Please help.

  • Thread starter Thread starter Bruce W.1
  • Start date Start date
B

Bruce W.1

My datagrid displays just fine. When I click on a row it posts
back but I can't seem to catch the event to do anything. My
handler never gets called. Can anyone please tell me why?


In the .aspx file:
------------------
<asp:DataGrid id="DataGrid1" runat="server" Width="400px"OnSelectedIndexChanged="DataGrid1_SelectedIndexChanged">


In the code behind:
-------------------
private void Page_Load(object sender, System.EventArgs e)
{
DataGrid1.ItemCreated += new DataGridItemEventHandler(this.Item_Created);
DataGrid1.SelectedIndexChanged += new EventHandler(this.DataGrid1_SelectedIndexChanged);

dbClass db = new dbClass();
DataSet ds = db.GetList();
DataGrid1.DataSource = ds;
DataGrid1.DataBind();
}

void Item_Created(Object sender, DataGridItemEventArgs e)
{
e.Item.Attributes.Add ("onmouseover", "this.style.backgroundColor='beige';this.style.cursor='hand'");
e.Item.Attributes.Add("onmouseout", "this.style.backgroundColor='white';");
e.Item.Attributes.Add("onclick", "javascript:__doPostBack('" + "DataGrid1:" + "ctrl" + e.Item.ItemIndex + ":ctrl0','')");
}

public void DataGrid1_SelectedIndexChanged (Object sender, EventArgs e)
{
Label2.Text = DataGrid1.SelectedItem.Cells[3].Text;
myTextBox.Text += "Hello from SelectedIndexChanged";
}


Thanks for your help.
 
What happens if you comment out the "e.Item.Attributes.Add("onclick",
"javascript:__doPostBack('" + "DataGrid1:" + "ctrl" + e.Item.ItemIndex +
":ctrl0','')");" ??


Bruce W.1 said:
My datagrid displays just fine. When I click on a row it posts
back but I can't seem to catch the event to do anything. My
handler never gets called. Can anyone please tell me why?


In the .aspx file:
------------------
<asp:DataGrid id="DataGrid1" runat="server" Width="400px"OnSelectedIndexChanged="DataGrid1_SelectedIndexChanged">


In the code behind:
-------------------
private void Page_Load(object sender, System.EventArgs e)
{
DataGrid1.ItemCreated += new DataGridItemEventHandler(this.Item_Created);
DataGrid1.SelectedIndexChanged += new EventHandler(this.DataGrid1_SelectedIndexChanged);

dbClass db = new dbClass();
DataSet ds = db.GetList();
DataGrid1.DataSource = ds;
DataGrid1.DataBind();
}

void Item_Created(Object sender, DataGridItemEventArgs e)
{
e.Item.Attributes.Add ("onmouseover", "this.style.backgroundColor='beige';this.style.cursor='hand'");
"this.style.backgroundColor='white';");
e.Item.Attributes.Add("onclick", "javascript:__doPostBack('" +
Click to expand...
"DataGrid1:" + "ctrl" + e.Item.ItemIndex + ":ctrl0','')");
}

public void DataGrid1_SelectedIndexChanged (Object sender, EventArgs e)
{
Label2.Text = DataGrid1.SelectedItem.Cells[3].Text;
myTextBox.Text += "Hello from SelectedIndexChanged";
}


Thanks for your help.
Click to expand...
 
Pat said:
What happens if you comment out the "e.Item.Attributes.Add("onclick",
"javascript:__doPostBack('" + "DataGrid1:" + "ctrl" + e.Item.ItemIndex +
":ctrl0','')");" ??
Click to expand...
========================================================

It does not post back (when clicking in the DataGrid) when this line is
commented out.
 
Two suggestions....

1. In your .aspx file, try adding a space between "400px" and
OnSelectedIndexChanged. It might matter it might not. Dumber things
have happened to me.

2. Try removing the OnSelectedIndexChanged declaration in the .aspx
You are already setting up the event handler in the Page_Load. It
might be messing it up.

Good luck,

Neil
 
nfedin said:
Two suggestions....

1. In your .aspx file, try adding a space between "400px" and
OnSelectedIndexChanged. It might matter it might not. Dumber things
have happened to me.

2. Try removing the OnSelectedIndexChanged declaration in the .aspx
You are already setting up the event handler in the Page_Load. It
might be messing it up.

Good luck,

Neil
Click to expand...
======================================================

Good suggestions, but they did not work.

Is there a way to look at the event that caused the postback?
 
I should add that this is based on this article:
http://www.dotnetbips.com/displayarticle.aspx?id=205

I loaded the source code for this article and it works fine. You click
on a name in the datagrid and it puts the name in a label.

The only big difference I see in the code (other than being VB instead
of C#) is this line:

Protected WithEvents Label1 As System.Web.UI.WebControls.Label

I'm not sure why the label would be an event handler.
 
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