Update Gridview from code behind without using templates

void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

{

int index = Convert.ToInt32(e.RowIndex.ToString());

string company1, about1,cmpnytype1, logo1, cntprsn1, website1;

string Telephone1 = GridView1.Rows[index].Cells[5].Text;

logo1= GridView1.Rows[index].Cells[2].Text;

company1 = ((TextBox)(GridView1.Rows[index].Cells[1].Controls[0])).Text;

about1 = ((TextBox)(GridView1.Rows[index].Cells[2].Controls[0])).Text;

cmpnytype1 = ((TextBox)(GridView1.Rows[index].Cells[3].Controls[0])).Text;

logo1 = ((TextBox)GridView1.Rows[index].Cells[4].Controls[0]).Text;

cntprsn1 = ((TextBox)GridView1.Rows[index].Cells[6].Controls[0]).Text;

website1 = ((TextBox)GridView1.Rows[index].Cells[7].Controls[0]).Text;

SqlDataSource1.UpdateParameters["Company_Name"].DefaultValue = company1;

SqlDataSource1.UpdateParameters["About"].DefaultValue = about1;

SqlDataSource1.UpdateParameters["Company_Type"].DefaultValue = cmpnytype1;

SqlDataSource1.UpdateParameters["Logo"].DefaultValue = logo1;

SqlDataSource1.UpdateParameters["Contact_Person"].DefaultValue =cntprsn1;

SqlDataSource1.UpdateParameters["Website"].DefaultValue = website1;

SqlDataSource1.UpdateParameters["Telephone"].DefaultValue = Telephone1;

SqlDataSource1.Update();

GridView1.EditIndex = -1;

bind1();

}

 

The problem is it is not updating. I have referred to this example https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowupdating(v=vs.110).aspx.

 

Please help