how can i change th Header Text of Auto genrated columns from Gridview at run time

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Hello
i am using asp.net 4.0
1. I want to remove come columns of data base form Auto genrate fields in Gridview.
2. how can i change th Header Text of Auto genrated columns from Gridview at run time
CODE:

protected void Button1_Click(object sender, EventArgs e)
{
    GridView1.Visible = true;
    SqlCommand cmd = new SqlCommand();
    cmd.Parameters.Add("@ten", SqlDbType.Float).Value = TextBox1.Text;
    cmd.Parameters.Add("@twel", SqlDbType.Float).Value = TextBox2.Text;
    cmd.CommandText = "select * from table1 where (ten >=  @ten) and (twel >= @twel)";
    cmd.Connection = con;
    SqlDataReader dr;
    dr = cmd.ExecuteReader();
    if (dr.HasRows)
    {
        dr.Read();
        GridView1.DataSource = dr;
        GridView1.DataBind();
    }

}

[edit]Code block added, "Ignore HTML..." option disabled - OriginalGriff[/edit]

Posted 1-Mar-11 20:46pm

Shagun Bansal

Updated 1-Mar-11 20:53pm

OriginalGriff

v2

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2 solutions

Solution 1

Don't post the same question twice: it has been less than 5 minutes, give people a chance to answer, rather than being so impatient!

Posted 1-Mar-11 20:52pm

OriginalGriff

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OriginalGriff · Accepted Answer · 2011-03-01T21:13:00

Solution 2

Please don't delete your questions, when they have been answered! It is very rude...

Anyway, for others, here is the solution again:

Use the GridView.HeaderRow property:

C#

GridViewRow header = gridViewPagedLog.HeaderRow;
header.Cells[0].Text = "Hello";
header.Cells[1].Text = "There";
header.Cells[2].Text = "Mush";

Posted 1-Mar-11 21:13pm

OriginalGriff

Comments

Shagun Bansal 2-Mar-11 3:26am

Thankyou sir..

when i run with this code:
GridView1.DataSource = dr;
GridViewRow header = GridView1.HeaderRow;
header.Cells[0].Text = "hello";
header.Cells[1].Text = "there";
GridView1.DataBind();

/* Object reference not set to an instance of an object.
ERROR COMES.. PLEASE HELP ME */

OriginalGriff 2-Mar-11 3:56am

Perhaps if you move the header stuff to after the DataBind, when the columns have a chance of having been created...

Shagun Bansal 2-Mar-11 4:52am

Thank you very much sir for your support. it WORKS

Now i am trying to remove or hide some columns at run time.
the current output is same as database fields.

when i try:
GridView1.Columns.RemoveAt(1);
/* ERROR is:
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index */

OriginalGriff 2-Mar-11 5:00am

Ask this as a separate question, and include a code fragment so we can see the order that you do things: it makes life easier for us all.