How to get selected value from Gridview

add your code at RowDataBound event. Then you get cell value.

In RowDataBound Event add following code.

declare a variable for store Row value.

<datatype> RowVal;

protected void CompanyGv1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
         RowVal = e.Row.Cells[1].Text.ToUpper();
    }
}

And then pass this variable to your code.

protected void btncontact_Click(object sender, EventArgs e)
{
    Response.Redirect("~/Admin/Company/Contact.aspx?CompanyName=" + RowVal );
}

hey

rowcommand event will help u, give commandargument to your control like select button and get the current row thats it just fetch the value of the current row.

if you have different case please specify.

all the best..

You don't need to use any server events for this. Use the ItemTemplate to create a button, or link, that will navigate as you wish

<asp:TemplateField>
<ItemTemplate>
  <a href='DataBinder.Eval(Container.DataItem, "column name", "~/Admin/Company/Contact.aspx?CompanyName={0}")'>Select<a/>
<ItemTemplate/>
</asp:TemplateField>

This is just a guess, but maybe you want :

Response.Redirect("~/Admin/Company/Contact.aspx?CompanyName=" + CompanyGv1.SelectedRow.Cells[0].Text);

However, I would check to see which part is giving you the null exception. During debugging, put a breakpoint on this line. YOu can hover over the part, or you can type in immediate window.

you can use javascript in place of CS

add template field in grid view and then add button on that template field
add js function go(this) on that button

and add javascript in your page
with

function go(th)
{
 alert("pagepath.aspx?"+th.parentNode.parentNode.chieldNode[1].innerText)
 window.location.href="pagepath.aspx?"+th.parentNode.parentNode.chieldNode[1].innerText
}

this work fast in place of code behiend