Question

After I click update in the grid view, the code works successfully. But when I retrieve the data in another webpage the columns I updated are blank. I have no clue why this happens.
Here is the code for both updating and displaying:
this is for updating

 protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
         string v =     System.Configuration.ConfigurationManager.ConnectionStrings["harish"].ConnectionString;
         con = new OracleConnection(v);
         con.Open();

         string query = "update leave_module1 set name='"+GridView1.Rows[e.RowIndex].Cells[0].Text+"'";
         OracleCommand cmd = new OracleCommand(query, con);
         cmd.ExecuteNonQuery();
         ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('The Data has been added');</script>;");
         GridView1.EditIndex = -1;
         con.Close();    
}

and this the loadgrid()

   protected void loadgrid()
{

     string v = System.Configuration.ConfigurationManager.ConnectionStrings["harish"].ConnectionString;
        con = new OracleConnection(v);
        con.Open(); 
        cmd = new OracleCommand("select *  from leave_module1 where '"+TextBox1.Text+"' between fd and td", con);
        dr = cmd.ExecuteReader();

        GridView1.DataSource=dr;
        GridView1.DataBind();
        con.Close();
        dr.Close();

}

Answer 1

These are the might be possible solutions or part of the whole solutions that I think would be helpful:

• Check that loadgrid() isn’t called before row_updating event because it will then cause the grid to lose changes and come back to normal view..
• Also check n understand from this link: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowupdating.aspx
• Don’t keep sql query or connection string name coded in page behind, instead use stored procedure or use some class containing string constants accessible which are thru out solution.
• Always use sql parameter and stop using string concats because it will cause sql infection issues.