ButtonColumn Class

Definition

Namespace:

System.Web.UI.WebControls

Assembly:

System.Web.dll

A column type for the DataGrid control that contains a user-defined button.

public ref class ButtonColumn : System::Web::UI::WebControls::DataGridColumn

public class ButtonColumn : System.Web.UI.WebControls.DataGridColumn

type ButtonColumn = class
    inherit DataGridColumn

Public Class ButtonColumn
Inherits DataGridColumn

Inheritance

Object

DataGridColumn

ButtonColumn

Examples

The following code example demonstrates how to use ButtonColumn class in a DataGrid control to create Add buttons.

private void Page_Init(Object sender, EventArgs e)
{

   // Create dynamic column to add to Columns collection.
   ButtonColumn AddColumn = new ButtonColumn();
   AddColumn.HeaderText="Add Item";
   AddColumn.Text="Add";
   AddColumn.CommandName="Add";
   AddColumn.ButtonType = ButtonColumnType.PushButton;

   // Add column to Columns collection.
   ItemsGrid.Columns.AddAt(2, AddColumn);
}

Private Sub Page_Init(sender As Object, e As EventArgs)
    
    ' Create dynamic column to add to Columns collection.
    Dim AddColumn As New ButtonColumn()
    AddColumn.HeaderText = "Add Item"
    AddColumn.Text = "Add"
    AddColumn.CommandName = "Add"
    AddColumn.ButtonType = ButtonColumnType.PushButton

    
    ' Add column to Columns collection.
    ItemsGrid.Columns.AddAt(2, AddColumn)
End Sub

Remarks

Use the ButtonColumn class in a DataGrid control to create a button that corresponds with each row in the DataGrid control. Specify the caption that is displayed in the buttons by setting the Text property. If you set the Text property, all buttons in the ButtonColumn object share the same caption. Alternatively, you can bind the ButtonColumn buttons to a field in a data source. This allows you to display different captions for each button. The values in the specified field are used for the text caption. Set the DataTextField property to bind the ButtonColumn to a field in a data source.

You can format the captions that are displayed in the buttons by setting the DataTextField property with a formatting string.

Clicking the buttons in the ButtonColumn raises the ItemCommand event. You can programmatically control the action that is performed when the button is clicked by providing an event handler for the ItemCommand event.

By default, page validation is not performed when a button in the ButtonColumn is clicked. Page validation determines whether the input controls that are associated with a validation control on the page all pass the validation rules that are specified by the validation control. To perform page validation when a button is clicked, set the CausesValidation property to true.

Constructors

ButtonColumn()

Initializes a new instance of the ButtonColumn class.

Properties

ButtonType	Gets or sets the type of button to display in the ButtonColumn object.
CausesValidation	Gets or sets a value indicating whether validation is performed when a button in the ButtonColumn object is clicked.
CommandName	Gets or sets a string that represents the command to perform when a button in the ButtonColumn object is clicked.
DataTextField	Gets or sets the field name from a data source to bind to the ButtonColumn object.
DataTextFormatString	Gets or sets the string that specifies the display format for the caption in each button.
DesignMode	Gets a value that indicates whether the column is in design mode. (Inherited from DataGridColumn)
FooterStyle	Gets the style properties for the footer section of the column. (Inherited from DataGridColumn)
FooterText	Gets or sets the text displayed in the footer section of the column. (Inherited from DataGridColumn)
HeaderImageUrl	Gets or sets the location of an image to display in the header section of the column. (Inherited from DataGridColumn)
HeaderStyle	Gets the style properties for the header section of the column. (Inherited from DataGridColumn)
HeaderText	Gets or sets the text displayed in the header section of the column. (Inherited from DataGridColumn)
IsTrackingViewState	Gets a value that determines whether the DataGridColumn object is marked to save its state. (Inherited from DataGridColumn)
ItemStyle	Gets the style properties for the item cells of the column. (Inherited from DataGridColumn)
Owner	Gets the DataGrid control that the column is a member of. (Inherited from DataGridColumn)
SortExpression	Gets or sets the name of the field or expression to pass to the OnSortCommand(DataGridSortCommandEventArgs) method when a column is selected for sorting. (Inherited from DataGridColumn)
Text	Gets or sets the caption that is displayed in the buttons of the ButtonColumn object.
ValidationGroup	Gets or sets the group of validation controls for which the ButtonColumn object causes validation when it posts back to the server.
ViewState	Gets the StateBag object that allows a column derived from the DataGridColumn class to store its properties. (Inherited from DataGridColumn)
Visible	Gets or sets a value that indicates whether the column is visible in the DataGrid control. (Inherited from DataGridColumn)

Methods

Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
FormatDataTextValue(Object)	Converts the specified value to the format that is indicated by the DataTextFormatString property.
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
Initialize()	Resets the ButtonColumn object to its initial state.
InitializeCell(TableCell, Int32, ListItemType)	Resets a cell in the ButtonColumn object to its initial state.
LoadViewState(Object)	Loads the state of the DataGridColumn object. (Inherited from DataGridColumn)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
OnColumnChanged()	Calls the OnColumnsChanged() method. (Inherited from DataGridColumn)
SaveViewState()	Saves the current state of the DataGridColumn object. (Inherited from DataGridColumn)
ToString()	Returns the string representation of the column. (Inherited from DataGridColumn)
TrackViewState()	Causes tracking of view-state changes to the server control so they can be stored in the server control's StateBag object. (Inherited from DataGridColumn)

Explicit Interface Implementations

IStateManager.IsTrackingViewState	Gets a value that indicates whether the column is tracking view state changes. (Inherited from DataGridColumn)
IStateManager.LoadViewState(Object)	Loads previously saved state. (Inherited from DataGridColumn)
IStateManager.SaveViewState()	Returns an object containing state changes. (Inherited from DataGridColumn)
IStateManager.TrackViewState()	Starts tracking state changes. (Inherited from DataGridColumn)

See also

• DataGrid
• DataGridColumn
• BoundColumn
• EditCommandColumn
• HyperLinkColumn
• TemplateColumn
• Button
• LinkButton