Develop Reference

GridView row clicked every time page is rendered

Basically everytime I load or reload the page it treats every row in my gridview as if it has been clicked, thus calling the function in the codebehind related to it once for every row which at the time is set to 13 rows max. Thanks for any help.
protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
// Attaching one onclick event for the entire row, so that it will
// fire SelectedIndexChanged, while we click anywhere on the row.
e.Row.Attributes["onclick"] =
ClientScript.GetPostBackClientHyperlink(this.GridView2, "Select$" + e.Row.RowIndex);
}
Console.WriteLine("");
}

Potential differences in gridview events within a master page

I have a master page that has a few child pages, this master page happens to contain a grid view because all child pages use one. I've gotten to the stage where I've realized small changes need to be appended to the grid view onrowdatabound event for individual child pages.
As an example I have 3 pages, A.aspx, B.aspx, C.aspx. All three use the grid and bind different data to the gridview that is in the master page. A & B are pretty much identical and there aren't any problems but C wants row attributes to be appended that A & B don't need.
How can I apply these changes without causing problems to the other pages?
[Optional] Is this the complete wrong way to go, and/or should I make them separate pages?
Little diagram of my situation

You can bind an event to a GridView programatically. So in page C.aspx you could do something like this:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
//find the gridview in the master page
GridView gv = Master.FindControl("GridView1") as GridView;
//add the event to the gridview
gv.RowDataBound += GridView1Master_RowDataBound;
gv.DataSource = mySource;
gv.DataBind();
}
}
protected void GridView1Master_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.BackColor = Color.Red;
}
}

Make GridView AutGenerateColumn a LinkButton that fires RowCommand event

Simple question which my searches seem to be coming up blank on.
I have a GridView that is AutoGeneratingColumns=True
This generates a column "MyColumn". I would like to make this columns value a clickable LinkButton that fires the RowCommand event of the GridView with a specific CommandNmae and the cells value as the CommandArgument.
I'm trying to do this without using a custom ItemTemplate, I know how to do that. I'm hoping i can pragmatically modify a auto generated column in the GridView as described.
Tia

This can be done in the OnRowDataBound event of the GridView.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
//check if the current row is a datarow
if (e.Row.RowType == DataControlRowType.DataRow)
{
///create a new linkbutton
LinkButton button = new LinkButton();
button.Text = "LinkButton";
button.CommandArgument = "MyArgs";
//assign a command to the button
button.Command += Button_Command;
//add the button to cell x
e.Row.Cells[3].Controls.Add(button);
}
}
Because you are adding control dynamically, the binding of the GridView should NOT be wrapped inside an IsPostBack check. Something you would do normally.

Why do I receive old data in my gridview on page load?

The process I am doing is if lbl.Text is "Validated" then disable the checkbox accordingly in grid. The code works fine if paging is not there.
Now the problem is I am using paging and when I click to the next page of grid
the validated things appear with the checkbox enabled.
I checked through breakpoints. Its loading the previous gridpage values during page load event. And after pageloadevent its going design and loads the new values in grid.
//-------loading previous page values of grid here---------
protected void Page_Load(object sender, EventArgs e)
{
foreach (GridViewRow row in GridView1.Rows)
{
Label lbl = (Label)row.FindControl("Labely8");
Label Label23 = (Label)row.FindControl("Label23");
CheckBox checkbox = (CheckBox)row.FindControl("chkRows");
if (lbl.Text == "Validated")
{
checkbox.Enabled = false;
}
else
{
checkbox.Enabled = true;
}
}
}

I think you need to do enable or disable each of the checkboxes individually in the GridView.RowDataBound event rather than all at once in the Page_Load event:
void GridView1_RowDataBound(Object sender, GridViewRowEventArgs e)
{
if(e.Row.RowType == DataControlRowType.DataRow)
{
CheckBox checkbox = (CheckBox)e.Row.FindControl("chkRows");
checkbox.Enabled = e.Row.Cells["nameOfCellWithLabel"].Text == "Validated";
}
}

Nesting Repeater in Gridview: Hiding gridview row and repeater header if data is not there in repeater

I have nested a repeater control in Gridview. Right now it is showing gridview rows and repeater header for every case(whether data is there or not for that particular grid view row in the repeater control). I want to hide the gridview row and repeater control header when there is no data present for that particular gridview row.
Thanks,
That case I handled at code level by filtering the resulted data table.
Now the another problem I am facing:
I have allowed the paging on the gridview i.e. pagesize 3.
When page loads it works fine, but when I go to page 2 then it generates following error:
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
Below is the code to fill the grid, paging and fill repeater on rowdatabound event of grid.
private void FillGrid()
{
clsCustomFunctions objShort = new clsCustomFunctions();
grd1.DataSource = objShort.GetAll();
}
protected void grd1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
try
{
FillGrid();
grd1.PageIndex = e.NewPageIndex;
grd1.DataBind();
}
catch (Exception ex)
{
lblMsg.Text = ex.Message;
}
}
protected void grd1_RowDataBound(object sender, GridViewRowEventArgs e)
{
clsCustomFunctions objShort = new clsCustomFunctions();
if (e.Row.RowType == DataControlRowType.DataRow)
{
((HtmlTable)e.Row.FindControl("gridTable")).BgColor = "#006699";
Repeater rpt = (Repeater)e.Row.FindControl("rpt1");
rpt.DataSource = objShort.GetResult(Convert.ToInt32(grd1.DataKeys[e.Row.DataItemIndex].Value));
rpt.DataBind();
}
}
grd1.DataKeys[e.Row.DataItemIndex].Value line is throwing error. How to handle this to pass values of page 2 only.

Try handling the OnRowDataBound event of the grid. This gives you a GridViewRowEventArgs object (say e).
You can then look at e.Row.DataItem to get the data it is binding to to check if you need to hide the header.
You can use e.Row.FindControl("RepeaterName") to get the repeater to manipulate as you want.