DataGridView (Win Form) สร้าง Custom แบบ Column/Header และการ Summary ผลรวม (VB.Net,C#)

'ID
'
Me.ID.DataPropertyName = "ColID"
Me.ID.HeaderText = "ID"
Me.ID.Name = "ID"
'
'FULLNAME
'
Me.FULLNAME.DataPropertyName = "ColFullName"
Me.FULLNAME.HeaderText = "Full Name"
Me.FULLNAME.Name = "FULLNAME"
'
'POINT
'
Me.POINT.DataPropertyName = "ColPoint"
Me.POINT.HeaderText = "Point"
Me.POINT.Name = "POINT"

// ID
// 
this.ID.DataPropertyName = "ColID";
this.ID.HeaderText = "ID";
this.ID.Name = "ID";
// 
// FULLNAME
// 
this.FULLNAME.DataPropertyName = "ColFullName";
this.FULLNAME.HeaderText = "Full Name";
this.FULLNAME.Name = "FULLNAME";
// 
// POINT
// 
this.POINT.DataPropertyName = "ColPoint";
this.POINT.HeaderText = "Point";
this.POINT.Name = "POINT";

   Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load

        ' Create Datable
        Dim dtTable As DataTable = New DataTable("myTable")

        ' Create Column Header
        dtTable.Columns.Add(New DataColumn("ColID", GetType(Integer)))
        dtTable.Columns.Add(New DataColumn("ColFullName", GetType(String)))
        dtTable.Columns.Add(New DataColumn("ColPoint", GetType(Integer)))
        dtTable.Columns.Add(New DataColumn("ColType", GetType(String)))

        ' Add Rows
        dtTable.Rows.Add(1, "Weerachai Nukitram", 10, "A")
        dtTable.Rows.Add(2, "Wisarut Nukitram", 20, "U")
        dtTable.Rows.Add(3, "Wipa Nukitram", 30, "U")


        ' Bind to DataGridView
        Me.myDataGridView.AutoGenerateColumns = False
        Me.myDataGridView.DataSource = dtTable

        ' Summary Total Point
        Dim iTotal As Integer
        For Each row As DataGridViewRow In Me.myDataGridView.Rows
            iTotal = iTotal + row.Cells("POINT").Value
        Next
        Me.lblTotalPoint.Text = String.Format("Total Point : {0}", iTotal)

    End Sub

       private void Form1_Load(object sender, EventArgs e)
        {
            // Create Datable
            DataTable dtTable = new DataTable("myTable");

            //Create Column Header
            dtTable.Columns.Add(new DataColumn("ColID", typeof(int)));
            dtTable.Columns.Add(new DataColumn("ColFullName", typeof(string)));
            dtTable.Columns.Add(new DataColumn("ColPoint", typeof(int)));
            dtTable.Columns.Add(new DataColumn("ColType", typeof(string)));

            // Add Rows
            dtTable.Rows.Add(1, "Weerachai Nukitram", 10, "A");
            dtTable.Rows.Add(2, "Wisarut Nukitram", 20, "U");
            dtTable.Rows.Add(3, "Wipa Nukitram", 30, "U");

            // Bind to DataGridView
            this.myDataGridView.AutoGenerateColumns = false;
            this.myDataGridView.DataSource = dtTable;

            // Summary Total Point
            int iTotal = 0;
            foreach (DataGridViewRow row in this.myDataGridView.Rows)
            {
                iTotal = iTotal + Convert.ToInt32(row.Cells["POINT"].Value);
            }
            this.lblTotalPoint.Text = String.Format("Total Point : {0}", iTotal);

        }