DataGridTableStyle Class

Definition

public ref class DataGridTableStyle : System::ComponentModel::Component, System::Windows::Forms::IDataGridEditingService

[System.ComponentModel.Browsable(false)]
[System.Obsolete("`DataGrid` is provided for binary compatibility with .NET Framework and is not intended to be used directly from your code. Use `DataGridView` instead.", false, DiagnosticId="WFDEV006", UrlFormat="https://aka.ms/winforms-warnings/{0}")]
public class DataGridTableStyle : System.ComponentModel.Component, System.Windows.Forms.IDataGridEditingService

public class DataGridTableStyle : System.ComponentModel.Component, System.Windows.Forms.IDataGridEditingService

[<System.ComponentModel.Browsable(false)>]
[<System.Obsolete("`DataGrid` is provided for binary compatibility with .NET Framework and is not intended to be used directly from your code. Use `DataGridView` instead.", false, DiagnosticId="WFDEV006", UrlFormat="https://aka.ms/winforms-warnings/{0}")>]
type DataGridTableStyle = class
    inherit Component
    interface IDataGridEditingService

type DataGridTableStyle = class
    inherit Component
    interface IDataGridEditingService

Public Class DataGridTableStyle
Inherits Component
Implements IDataGridEditingService

Inheritance

Object

MarshalByRefObject

Component

DataGridTableStyle

Attributes

BrowsableAttribute ObsoleteAttribute

Implements

IDataGridEditingService

Examples

The following code example creates two DataGridTableStyle instances and sets the MappingName of each object to the TableName of a DataTable in a DataSet. The example then adds DataGridColumnStyle objects to the GridColumnStylesCollection of each DataGridTableStyle. For an example that runs, see the System.Windows.Forms.DataGrid example.

void AddCustomDataTableStyle()
{
   
   /* Create a new DataGridTableStyle and set
         its MappingName to the TableName of a DataTable. */
   DataGridTableStyle^ ts1 = gcnew DataGridTableStyle;
   ts1->MappingName = "Customers";
   
   /* Add a GridColumnStyle and set its MappingName 
         to the name of a DataColumn in the DataTable. 
         Set the HeaderText and Width properties. */
   DataGridColumnStyle^ boolCol = gcnew DataGridBoolColumn;
   boolCol->MappingName = "Current";
   boolCol->HeaderText = "IsCurrent Customer";
   boolCol->Width = 150;
   ts1->GridColumnStyles->Add( boolCol );
   
   // Add a second column style.
   DataGridColumnStyle^ TextCol = gcnew DataGridTextBoxColumn;
   TextCol->MappingName = "custName";
   TextCol->HeaderText = "Customer Name";
   TextCol->Width = 250;
   ts1->GridColumnStyles->Add( TextCol );
   
   // Create the second table style with columns.
   DataGridTableStyle^ ts2 = gcnew DataGridTableStyle;
   ts2->MappingName = "Orders";
   
   // Change the colors.
   ts2->ForeColor = Color::Yellow;
   ts2->AlternatingBackColor = Color::Blue;
   ts2->BackColor = Color::Blue;
   
   // Create new DataGridColumnStyle objects.
   DataGridColumnStyle^ cOrderDate = gcnew DataGridTextBoxColumn;
   cOrderDate->MappingName = "OrderDate";
   cOrderDate->HeaderText = "Order Date";
   cOrderDate->Width = 100;
   ts2->GridColumnStyles->Add( cOrderDate );
   PropertyDescriptorCollection^ pcol = this->BindingContext[ myDataSet,"Customers.custToOrders" ]->GetItemProperties();
   DataGridColumnStyle^ csOrderAmount = gcnew DataGridTextBoxColumn( pcol[ "OrderAmount" ],"c",true );
   csOrderAmount->MappingName = "OrderAmount";
   csOrderAmount->HeaderText = "Total";
   csOrderAmount->Width = 100;
   ts2->GridColumnStyles->Add( csOrderAmount );
   
   // Add the DataGridTableStyle objects to the collection.
   myDataGrid->TableStyles->Add( ts1 );
   myDataGrid->TableStyles->Add( ts2 );
}

private void AddCustomDataTableStyle()
   {
      /* Create a new DataGridTableStyle and set
      its MappingName to the TableName of a DataTable. */
      DataGridTableStyle ts1 = new DataGridTableStyle();
      ts1.MappingName = "Customers";

      /* Add a GridColumnStyle and set its MappingName 
      to the name of a DataColumn in the DataTable. 
      Set the HeaderText and Width properties. */
      
      DataGridColumnStyle boolCol = new DataGridBoolColumn();
      boolCol.MappingName = "Current";
      boolCol.HeaderText = "IsCurrent Customer";
      boolCol.Width = 150;
      ts1.GridColumnStyles.Add(boolCol);
      
      // Add a second column style.
      DataGridColumnStyle TextCol = new DataGridTextBoxColumn();
      TextCol.MappingName = "custName";
      TextCol.HeaderText = "Customer Name";
      TextCol.Width = 250;
      ts1.GridColumnStyles.Add(TextCol);

      // Create the second table style with columns.
      DataGridTableStyle ts2 = new DataGridTableStyle();
      ts2.MappingName = "Orders";
      // Change the colors.
      ts2.ForeColor = Color.Yellow;
      ts2.AlternatingBackColor = Color.Blue;
      ts2.BackColor = Color.Blue;
      
      // Create new DataGridColumnStyle objects.
      DataGridColumnStyle cOrderDate = 
      new DataGridTextBoxColumn();
      cOrderDate.MappingName = "OrderDate";
      cOrderDate.HeaderText = "Order Date";
      cOrderDate.Width = 100;
      ts2.GridColumnStyles.Add(cOrderDate);

      PropertyDescriptorCollection pcol = this.BindingContext
      [myDataSet, "Customers.custToOrders"].GetItemProperties();
      
      DataGridColumnStyle csOrderAmount = 
      new DataGridTextBoxColumn(pcol["OrderAmount"], "c", true);
      csOrderAmount.MappingName = "OrderAmount";
      csOrderAmount.HeaderText = "Total";
      csOrderAmount.Width = 100;
      ts2.GridColumnStyles.Add(csOrderAmount);

      // Add the DataGridTableStyle objects to the collection.
      myDataGrid.TableStyles.Add(ts1);
      myDataGrid.TableStyles.Add(ts2);
   }

Private Sub AddCustomDataTableStyle()
    ' Create a new DataGridTableStyle and set
    ' its MappingName to the TableName of a DataTable. 
    Dim ts1 As New DataGridTableStyle()
    ts1.MappingName = "Customers"
    
    ' Add a GridColumnStyle and set its MappingName
    ' to the name of a DataColumn in the DataTable.
    ' Set the HeaderText and Width properties. 
    
    Dim boolCol As New DataGridBoolColumn()
    boolCol.MappingName = "Current"
    boolCol.HeaderText = "IsCurrent Customer"
    boolCol.Width = 150
    ts1.GridColumnStyles.Add(boolCol)
    
    ' Add a second column style.
    Dim TextCol As New DataGridTextBoxColumn()
    TextCol.MappingName = "custName"
    TextCol.HeaderText = "Customer Name"
    TextCol.Width = 250
    ts1.GridColumnStyles.Add(TextCol)

    ' Create the second table style with columns.
    Dim ts2 As New DataGridTableStyle()
    ts2.MappingName = "Orders"

    ' Change the colors.
    ts2.ForeColor = Color.Yellow
    ts2.AlternatingBackColor = Color.Blue
    ts2.BackColor = Color.Blue
    
    ' Create new DataGridColumnStyle objects.
    Dim cOrderDate As New DataGridTextBoxColumn()
    cOrderDate.MappingName = "OrderDate"
    cOrderDate.HeaderText = "Order Date"
    cOrderDate.Width = 100
    ts2.GridColumnStyles.Add(cOrderDate)
    
    Dim pcol As PropertyDescriptorCollection = Me.BindingContext(myDataSet, "Customers.custToOrders").GetItemProperties()
    
    Dim csOrderAmount As New DataGridTextBoxColumn(pcol("OrderAmount"), "c", True)
    csOrderAmount.MappingName = "OrderAmount"
    csOrderAmount.HeaderText = "Total"
    csOrderAmount.Width = 100
    ts2.GridColumnStyles.Add(csOrderAmount)

    ' Add the DataGridTableStyle objects to the collection.
    myDataGrid.TableStyles.Add(ts1)
    myDataGrid.TableStyles.Add(ts2)
End Sub

Remarks

The System.Windows.Forms.DataGrid control displays data in the form of a grid. The DataGridTableStyle is a class that represents the drawn grid only. This grid should not be confused with the DataTable class, which is a possible source of data for the grid. Instead, the DataGridTableStyle strictly represents the grid as it is painted in the control. Therefore, through the DataGridTableStyle you can control the appearance of the grid for each DataTable. To specify which DataGridTableStyle is used when displaying data from a particular DataTable, set the MappingName to the TableName of a DataTable.

The GridTableStylesCollection retrieved through the TableStyles property contains all the DataGridTableStyle objects used by a System.Windows.Forms.DataGrid control. The collection can contain as many DataGridTableStyle objects as you need, however the MappingName of each must be unique. At run time, this allows you to substitute a different DataGridTableStyle for the same data, depending on the user's preference. To do this:

1. Populate the GridTableStylesCollection with DataGridTableStyle objects. If a DataGridTableStyle exists in the GridTableStylesCollection whose MappingName property value equals the DataTable object's TableName property, the DataTable is displayed with this DataGridTableStyle. If no DataGridTableStyle exists with a matching MappingName, the DataTable is displayed with the default style for data grid tables.

2. When a different grid style is needed, use the Item property to select the appropriate DataGridTableStyle (pass the TableName to the Item[] property) and set the MappingName of the returned object to a new value.

3. Use the Item[] property to select the desired DataGridTableStyle, and set its MappingName to the TableName of the DataTable.

To determine which DataGridTableStyle is currently displayed, use the DataSource and DataMember properties of the System.Windows.Forms.DataGrid to return a CurrencyManager. If the data source implements the ITypedList interface, you can use the GetListName method to return the MappingName of the current table. This is shown in the C# code below:

private void PrintCurrentListName(DataGrid myDataGrid){
 CurrencyManager myCM = (CurrencyManager)
 BindingContext[myDataGrid.DataSource, myDataGrid.DataMember];
 IList myList = myCM.List;
 ITypedList thisList = (ITypedList) myList;
 Console.WriteLine(thisList.GetListName(null));
}

If the DataSet contains DataTable objects related through DataRelation objects, and the currently displayed DataTable is a child table, the DataMember will return a string in the form of TableName.RelationName (in the simplest case). If the DataTable is further down in the hierarchy, the string will consist of the parent table's name followed by the necessary RelationName values required to reach the table's level. For example, imagine three DataTable objects in a hierarchical relationship named (top to bottom) Regions, Customers, and Orders, and two DataRelation objects named RegionsToCustomers and CustomersToOrders, the DataMember property will return "Regions.RegionsToCustomers.CustomersToOrders". However, the MappingName will then be "Orders".

The collection of DataGridTableStyle objects is returned through the TableStyles property of the System.Windows.Forms.DataGrid.

When a DataGridTableStyle is displayed, the settings for the DataGridTableStyle will override the settings for the System.Windows.Forms.DataGrid control. If a value is not set for a particular DataGridTableStyle property, the System.Windows.Forms.DataGrid control's value will be used instead. The following list shows the DataGridColumnStyle properties that can be set to override System.Windows.Forms.DataGrid control properties:

• AllowSorting

• AlternatingBackColor

• BackColor

• ColumnHeadersVisible

• ForeColor

• GridLineColor

• GridLineStyle

• HeaderBackColor

• HeaderFont

• HeaderForeColor

• LinkColor

• PreferredColumnWidth

• PreferredRowHeight

• ReadOnly

• RowHeadersVisible

• RowHeaderWidth

• SelectionBackColor

• SelectionForeColor

To bind the DataGrid to a strongly typed array of objects, the object type must contain public properties. To create a DataGridTableStyle that displays the array, set the DataGridTableStyle.MappingName property to typename where typename is replaced by the name of the object type. Also note that the MappingName property is case-sensitive; the type name must be matched exactly. See the MappingName property for an example.

You can also bind the DataGrid to an ArrayList. A feature of the ArrayList is that it can contain objects of multiple types, but the DataGrid can only bind to such a list when all items in the list are of the same type as the first item. This means that all objects must either be of the same type, or they must inherit from the same class as the first item in the list. For example, if the first item in a list is a Control, the second item could be a TextBox (which inherits from Control). If, on the other hand, the first item is a TextBox, the second object cannot be a Control. Further, the ArrayList must have items in it when it is bound and the objects in the DataGridTableStyle must contain public properties. An empty ArrayList will result in an empty grid. When binding to an ArrayList, set the MappingName of the DataGridTableStyle to "ArrayList" (the type name).

See also

• DataGrid
• DataGridColumnStyle
• GridColumnStylesCollection
• GridTableStylesCollection