deleting the multiple rowsof data in datagridview as well as in database

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C#

I wish to ask how i can delete the both database and selected row from data grid view by using C# windows form button??

Posted 5-Nov-13 19:50pm

jocherry

Updated 7-Nov-13 14:58pm

v2

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3 solutions

Solution 3

Your .aspx page grid code.

C#

<asp:templatefield headertext="Action" xmlns:asp="#unknown">
   <itemtemplate>                   
      <asp:linkbutton id="lblDelete" runat="server" commandname="DeleteRecord" commandargument="<%#Eval("Id") %>">Delete</asp:linkbutton>
   </itemtemplate>
</asp:templatefield>

And Note that...

Here don't use commandname="Delete/delete/DELETE". This are inbuilt keywords. IF you use this keywords it will call OnDelete event not OnRowCommand. This will occur runtime exception that OnDelete event was not handled.

Your Code To Delete the record.

C#

protected void GVCategories_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        int id = Convert.ToInt32(e.CommandArgument.ToString());

        //If Commandname == Delete Record then We will Proceed to delete the record
        if (e.CommandName == "DeleteRecord")
        {

            int result = 0;
            SqlCommand cmd = new SqlCommand();

           try
           {
               if (conn.State == ConnectionState.Closed)
               {
                   conn.Open();
               }

               cmd.CommandText = "DeleteCategory";
               cmd.CommandType = CommandType.StoredProcedure;
               cmd.Connection = conn;
               cmd.Parameters.Add(new SqlParameter("@ID", id));
               cmd.CommandTimeout = 10;
               result = cmd.ExecuteNonQuery();

            }
            catch (Exception ex)
            {
               Console.WriteLine("Error occured in DAL.DeleteSelectedRow() \nMessage : " + ex.Message + "InnerException : " + ex.InnerException);
            }
            finally
            {
               cmd.Dispose();
               conn.Close();
            }
            
        }
        
    }

Here your Half work is done.
This will delete data from database.
And to refresh the Grid what you need is get fresh data from database and bind the grid with that fresh data.

Hope This Help You
--------------------
Pratik Bhuva

Posted 5-Nov-13 23:04pm

Pratik Bhuva

Updated 5-Nov-13 23:13pm

v5

Solution 1

Check This:
Insert-update-delete-with-datagridview-control-in-c#-windows-application[^]
Add, Edit, and Delete in DataGridView with Paging[^]

Posted 5-Nov-13 19:56pm

Tom Marvolo Riddle

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jocherry · Accepted Answer · 2013-11-08T20:50:00

C#

private void btnDelete_Click(object sender, EventArgs e)
      {
          int i = 0;
          string str;
          List<int> ChkedRow = new List<int>();
          for (i = 0; i <= dataGridView1.Rows.Count - 1; i++)
          {
              if (Convert.ToBoolean(dataGridView1.Rows[i].Cells["Col1"].Value) == true)
              {
                  ChkedRow.Add(i);
              }
          }
          if (ChkedRow.Count == 0)
          {
              MessageBox.Show("Select one checkbox");
              return;
          }

          foreach (int j in ChkedRow)// deleting from Database
          {
              str = "Delete from eventdgv where Name='" + dataGridView1.Rows[j].Cells[1].Value.ToString() + "'";
              try
              {
                  using (SqlCeConnection cn = new SqlCeConnection(connection))
                  {
                      using (SqlCeCommand cmd = new SqlCeCommand(str, cn))
                      {
                          cn.Open();
                          cmd.ExecuteNonQuery();
                      }
                  }
              }
              catch (Exception ex)
              {
                  MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
              }

          }
          for (int s = dataGridView1.Rows.Count - 1; s >= 0; s--)// Deleting from gridview
          {
              if (Convert.ToBoolean(dataGridView1.Rows[s].Cells["Col1"].Value) == true)
              {
                  dataGridView1.Rows.RemoveAt(s);
              }
          }

          disp();
          MessageBox.Show("deleted succesfully");

      }