get value from grid view column in c# for every rows in web application

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i used grid view and loaded this by sql stored procedure using data table. i want to get first column value in every rows and pass this as a query string in hyperlink.
my code is....
.........
......
..
con.Open();
DataTable dt = new DataTable();

// SqlCommand cmd = new SqlCommand(str, con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
//SqlDataReader dr = cmd.ExecuteReader();
da.Fill(dt);
if (dt.Rows.Count > 0)
{

GridView1.DataSource = dt;
GridView1.DataBind();

HyperLinkField hfield = new HyperLinkField();
hfield.HeaderText = "Book ID"; hfield.NavigateUrl = "Issue_book.aspx?bid=";

hfield.DataTextField = dt.Columns[0].ToString();

GridView1.Columns.Add(hfield);
I want to pass "Book ID" as a query string in Issue_book.aspx?bid=

Posted 27-Jan-15 21:40pm

enamul haque

Updated 27-Jan-15 21:42pm

v2

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Ni!E$H_WAGH · Answer 1 · 2015-01-27T22:29:00

Simply write RowCommand Event for GridView like this

protected void gridView_RowCommand(object sender, GridViewCommandEventArgs e)
{

int rowId = int.Parse(e.CommandArgument.ToString());

if (e.CommandName == "linkbtn")//EditRow
{
string value = dtbVendorTargetDetails.Rows[rowId]["value"].ToString();
Response.Redirect("frmPage.aspx?code=" + value);
}

}