// Step 1. Derive a custom column style from DataGridTextBoxColumn 
 
     //     a) add a ComboBox member 
 
     // b) track when the combobox has focus in Enter and Leave events 
 
     // c) override Edit to allow the ComboBox to replace the TextBox 
 
     // d) override Commit to save the changed data 
 

 

 
     // Step 2 - Use the combo column style 
 
     // Add 1 col with combo style 
 
     DataGridComboBoxColumn ComboTextCol = new DataGridComboBoxColumn(); 
 
     ComboTextCol.MappingName = "custCity"; 
 
     ComboTextCol.HeaderText = "Customer Address"; 
 
     ComboTextCol.Width = 100; 
 
     ts1.GridColumnStyles.Add(ComboTextCol); 
 

 
     // Step 3 - Additional setup for Combo style 
 
     // a) make the row height a little larger to handle minimum combo height 
 
     ts1.PreferredRowHeight = ComboTextCol.ColumnComboBox.Height + 3; 
 
     // b) Populate the combobox somehow. It is a normal combobox, so whatever... 
 
     ComboTextCol.ColumnComboBox.Items.Clear(); 
 
     ComboTextCol.ColumnComboBox.Items.Add("Chicago"); 
 
     ComboTextCol.ColumnComboBox.Items.Add("Corvallis"); 
 
     ComboTextCol.ColumnComboBox.Items.Add("Denver"); 
 
     ComboTextCol.ColumnComboBox.Items.Add("Great Falls"); 
 
     ComboTextCol.ColumnComboBox.Items.Add("Kansas City"); 
 
     ComboTextCol.ColumnComboBox.Items.Add("Los Angeles"); 
 
     ComboTextCol.ColumnComboBox.Items.Add("Raleigh"); 
 
     ComboTextCol.ColumnComboBox.Items.Add("Washington"); 
 

 
     // c) set the dropdown style of the combo... 
 
     ComboTextCol.ColumnComboBox.DropDownStyle = ComboBoxStyle.DropDownList;

public class DataGridColoredTextBoxColumn : DataGridTextBoxColumn
     {
          protected override void Paint(System.Drawing.Graphics g,
               System.Drawing.Rectangle bounds, System.Windows.Forms.CurrencyManager
               source, int rowNum, System.Drawing.Brush backBrush, System.Drawing.Brush
               foreBrush, bool alignToRight)
          {
          // the idea is to conditionally set the foreBrush and/or backbrush
          // depending upon some criteria on the cell value
          // Here, we color anything that begins with a letter higher than 'F'
               try{
                    object o = this.GetColumnValueAtRow(source, rowNum);
                    if( o!= null)
                    {
                         char c = ((string)o)[0];
                         if( c > 'F')
                         {
                         // could be as simple as
                         // backBrush = new SolidBrush(Color.Pink);
                         // or something fancier...
                              backBrush = new LinearGradientBrush(bounds,
                                   Color.FromArgb(255, 200, 200),
                                   Color.FromArgb(128, 20, 20),
                                   LinearGradientMode.BackwardDiagonal);
                              foreBrush = new SolidBrush(Color.White);
                         }
                    }
               }
                catch(Exception ex){ /* empty catch */ }
               finally{
                    // make sure the base class gets called to do the drawing with
                    // the possibly changed brushes
                    base.Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight);
               }
          }
     }

// code assumes you have a DataSet named myDataSet, a table named "EastCoastSales" and a DataGrid myDataGrid
//STEP 1: Create a DataTable style object and set properties if required.
     DataGridTableStyle ts1 = new DataGridTableStyle();

     //specify the table from dataset (required step)
     ts1.MappingName = "EastCoastSales";
     
     // Set other properties (optional step)
     ts1.AlternatingBackColor = Color.LightBlue;

//STEP 2: Create a string column and add it to the tablestyle
     DataGridColumnStyle TextCol = new DataGridTextBoxColumn();
     TextCol.MappingName = "custName"; //from dataset table
     TextCol.HeaderText = "Customer Name";
     TextCol.Width = 250;
     ts1.GridColumnStyles.Add(TextCol);

//STEP 3: Create an int column style and add it to the tablestyle
     //this requires setting the format for the column through its property descriptor
     PropertyDescriptorCollection pdc = this.BindingContext
           [myDataSet, "EastCoastSales"].GetItemProperties();

     //now created a formated column using the pdc
     DataGridDigitsTextBoxColumn csIDInt =
           new DataGridDigitsTextBoxColumn(pdc["CustID"], "i", true);
     csIDInt.MappingName = "CustID";
     csIDInt.HeaderText = "CustID";
     csIDInt.Width = 100;
     ts1.GridColumnStyles.Add(csIDInt);

//STEP 4: Add the checkbox
     DataGridColumnStyle boolCol = new DataGridBoolColumn();
     boolCol.MappingName = "Current";
     boolCol.HeaderText = "Info Current";

//uncomment this line to get a two-state checkbox
     //((DataGridBoolColumn)boolCol).AllowNull = false;

     boolCol.Width = 150;
     ts1.GridColumnStyles.Add(boolCol);

//STEP 5: Add the tablestyle to your datagrid's tablestlye collection
     myDataGrid.TableStyles.Add(ts1);

public class DataGridDigitsTextBoxColumn : DataGridTextBoxColumn
{
     public DataGridDigitsTextBoxColumn(System.ComponentModel.PropertyDescriptor pd, string format, bool b)
               : base(pd, format, b)
     {
          this.TextBox.KeyPress += new System.Windows.Forms.KeyPressEventHandler(HandleKeyPress);
     }

     private void HandleKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
     {
          //ignore if not digit or control key
          if(!char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar))
               e.Handled = true;

          //ignore if more than 3 digits
          if(this.TextBox.Text.Length >= 3 && !char.IsControl(e.KeyChar))
               e.Handled = true;
     }

     protected override void Dispose(bool disposing)
     {
          if(disposing)
               this.TextBox.KeyPress -= new System.Windows.Forms.KeyPressEventHandler(HandleKeyPress);

          base.Dispose(disposing);
     }
}

//this override will prevent the cell in row 1 from getting the edit focus
protected override void Edit(System.Windows.Forms.CurrencyManager source, int rowNum, System.Drawing.Rectangle bounds, bool readOnly, string instantText, bool cellIsVisible)
{
     if(rowNum == 1)
          return;
     base.Edit(source, rowNum, bounds, readOnly, instantText, cellIsVisible);
}

public void MoveColumn(DataGrid _dataGrid, string _mappingName, int fromCol, int toCol)
{
     if(fromCol == toCol) return;

     DataGridTableStyle oldTS = _dataGrid.TableStyles[_mappingName];
     DataGridTableStyle newTS = new DataGridTableStyle();
     newTS.MappingName = _mappingName;

     for(int i = 0; i < oldTS.GridColumnStyles.Count; ++i)
     {
          if(i != fromCol && fromCol < toCol)
               newTS.GridColumnStyles.Add(oldTS.GridColumnStyles[i]);
          if(i == toCol)
               newTS.GridColumnStyles.Add(oldTS.GridColumnStyles[fromCol]);
          if(i != fromCol && fromCol > toCol)
               newTS.GridColumnStyles.Add(oldTS.GridColumnStyles[i]);     
     }

     _dataGrid.TableStyles.Remove(oldTS);
     _dataGrid.TableStyles.Add(newTS);
}

//sample usage
private void button1_Click(object sender, System.EventArgs e)
{
     MoveColumn(myDataGrid, "Customers", 3, 1);
}

[VB.NET]
Public Sub MoveColumn(_dataGrid As DataGrid, _mappingName As String, fromCol As Integer, toCol As Integer)
     If fromCol = toCol Then
          Return
     End If
     Dim oldTS As DataGridTableStyle = _dataGrid.TableStyles(_mappingName)
     Dim newTS As New DataGridTableStyle()
     newTS.MappingName = _mappingName

     Dim i As Integer
     i = 0
     While i < oldTS.GridColumnStyles.Count
          If i <> fromCol And fromCol < toCol Then
               newTS.GridColumnStyles.Add(oldTS.GridColumnStyles(i))
          End If
          If i = toCol Then
               newTS.GridColumnStyles.Add(oldTS.GridColumnStyles(fromCol))     
          End If
          If i <> fromCol And fromCol > toCol Then
               newTS.GridColumnStyles.Add(oldTS.GridColumnStyles(i))
          End If
          i = i + 1
     End While
     _dataGrid.TableStyles.Remove(oldTS)
     _dataGrid.TableStyles.Add(newTS)
End Sub 'MoveColumn

'sample usage
Private Sub button1_Click(sender As Object, e As System.EventArgs)
     MoveColumn(myDataGrid, "Customers", 3, 1)
End Sub 'button1_Click