Look at given point:

CommandName is used to differentiate two button type controls within Gridveiw as shown below.

Observe the following snippet:

code

For the above code we will get the following design:

design

Code:
  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Web;
  5. using System.Web.UI;
  6. using System.Web.UI.WebControls;
  7. using System.Data.SqlClient;
  8. using System.Data;
  10. namespace WebApplication1
  11. {
  12. public partial class WebForm2 : System.Web.UI.Page
  13. {
  14. SqlConnection con = new SqlConnection("server=.;database=abc;trusted_connection=true");
  15. protected void Page_Load(object sender, EventArgs e)
  16. {
  17. if (!IsPostBack)
  18. {
  19. bind();
  20. }
  22. }
  23. public void bind()
  24. {
  25. SqlCommand cmd = new SqlCommand("select * from employee", con);
  26. SqlDataAdapter da = new SqlDataAdapter(cmd);
  27. DataSet ds = new DataSet();
  28. da.Fill(ds, "con");
  29. GridView1.DataSource = ds;
  30. GridView1.DataBind();
  31. }
  33. protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
  34. {
  36. if (e.CommandName == "comdel")
  37. {
  39. int l = Convert.ToInt32(e.CommandArgument);
  40. con.Open();
  41. SqlCommand cmd = new SqlCommand("delete from employee where eno=@a", con);
  42. cmd.Parameters.AddWithValue("@a", l);
  43. int i = cmd.ExecuteNonQuery();
  44. if (i == 1)
  45. {
  46. Response.Write("Record deleted");
  47. bind();
  48. }
  49. else
  50. {
  51. Response.Write("Recodrd not deleted...");
  52. }
  54. Page_Load(sender, e);
  55. }
  56. }
  57. }
  58. }
Explanation on e.commandargument:

In the above code I used the following line in rowcommand event.
  1. if (e.CommandName == "comdel")
  2. {
  4. int l = Convert.ToInt32(e.CommandArgument);
  5. …..
  6. …
  7. …
  8. }
e.commandargument specifies the employee number. Observe the following aspx code snippet.

commandargument
If still any doubts plzz feel free to ask.

Thank you.