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//------------------------------------------------------------------------------
// <copyright file="ButtonColumn.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls {
using System;
using System.Collections;
using System.ComponentModel;
using System.Globalization;
using System.Web;
using System.Web.UI;
using System.Web.Util;
/// <devdoc>
/// <para>Creates a column with a set of <see cref='System.Web.UI.WebControls.Button'/>
/// controls.</para>
/// </devdoc>
public class ButtonColumn : DataGridColumn {
private PropertyDescriptor textFieldDesc;
/// <devdoc>
/// <para>Initializes a new instance of the <see cref='System.Web.UI.WebControls.ButtonColumn'/> class.</para>
/// </devdoc>
public ButtonColumn() {
}
/// <devdoc>
/// <para>Gets or sets the type of button to render in the
/// column.</para>
/// </devdoc>
[
WebCategory("Appearance"),
DefaultValue(ButtonColumnType.LinkButton),
WebSysDescriptionAttribute(SR.ButtonColumn_ButtonType)
]
public virtual ButtonColumnType ButtonType {
get {
object o = ViewState["ButtonType"];
if (o != null)
return(ButtonColumnType)o;
return ButtonColumnType.LinkButton;
}
set {
if (value < ButtonColumnType.LinkButton || value > ButtonColumnType.PushButton) {
throw new ArgumentOutOfRangeException("value");
}
ViewState["ButtonType"] = value;
OnColumnChanged();
}
}
[
DefaultValue(false),
WebSysDescriptionAttribute(SR.ButtonColumn_CausesValidation)
]
public virtual bool CausesValidation {
get {
object o = ViewState["CausesValidation"];
if (o != null) {
return (bool)o;
}
return false;
}
set {
ViewState["CausesValidation"] = value;
OnColumnChanged();
}
}
/// <devdoc>
/// <para>Gets or sets the command to perform when this <see cref='System.Web.UI.WebControls.Button'/>
/// is clicked.</para>
/// </devdoc>
[
WebCategory("Behavior"),
DefaultValue(""),
WebSysDescriptionAttribute(SR.WebControl_CommandName)
]
public virtual string CommandName {
get {
object o = ViewState["CommandName"];
if (o != null)
return(string)o;
return string.Empty;
}
set {
ViewState["CommandName"] = value;
OnColumnChanged();
}
}
/// <devdoc>
/// <para>Gets or sets the field name from the data model that is
/// bound to the <see cref='System.Web.UI.WebControls.ButtonColumn.Text'/> property of the button in this column.</para>
/// </devdoc>
[
WebCategory("Data"),
DefaultValue(""),
WebSysDescriptionAttribute(SR.ButtonColumn_DataTextField)
]
public virtual string DataTextField {
get {
object o = ViewState["DataTextField"];
if (o != null)
return(string)o;
return String.Empty;
}
set {
ViewState["DataTextField"] = value;
OnColumnChanged();
}
}
/// <devdoc>
/// <para>Gets or sets the string used to format the data bound to
/// the <see cref='System.Web.UI.WebControls.ButtonColumn.Text'/> property of the button.</para>
/// </devdoc>
[
WebCategory("Data"),
DefaultValue(""),
WebSysDescriptionAttribute(SR.ButtonColumn_DataTextFormatString)
]
public virtual string DataTextFormatString {
get {
object o = ViewState["DataTextFormatString"];
if (o != null)
return(string)o;
return String.Empty;
}
set {
ViewState["DataTextFormatString"] = value;
OnColumnChanged();
}
}
/// <devdoc>
/// <para>Gets or sets the caption text displayed on the <see cref='System.Web.UI.WebControls.Button'/>
/// in this column.</para>
/// </devdoc>
[
Localizable(true),
WebCategory("Appearance"),
DefaultValue(""),
WebSysDescriptionAttribute(SR.ButtonColumn_Text)
]
public virtual string Text {
get {
object o = ViewState["Text"];
if (o != null)
return(string)o;
return String.Empty;
}
set {
ViewState["Text"] = value;
OnColumnChanged();
}
}
[
DefaultValue(""),
WebSysDescriptionAttribute(SR.ButtonColumn_ValidationGroup)
]
public virtual string ValidationGroup {
get {
object o = ViewState["ValidationGroup"];
if (o != null) {
return (string)o;
}
return String.Empty;
}
set {
ViewState["ValidationGroup"] = value;
OnColumnChanged();
}
}
/// <devdoc>
/// </devdoc>
protected virtual string FormatDataTextValue(object dataTextValue) {
string formattedTextValue = String.Empty;
if (!DataBinder.IsNull(dataTextValue)) {
string formatting = DataTextFormatString;
if (formatting.Length == 0) {
formattedTextValue = dataTextValue.ToString();
}
else {
formattedTextValue = String.Format(CultureInfo.CurrentCulture, formatting, dataTextValue);
}
}
return formattedTextValue;
}
/// <devdoc>
/// </devdoc>
public override void Initialize() {
base.Initialize();
textFieldDesc = null;
}
/// <devdoc>
/// <para>Initializes a cell in the <see cref='System.Web.UI.WebControls.ButtonColumn'/> .</para>
/// </devdoc>
public override void InitializeCell(TableCell cell, int columnIndex, ListItemType itemType) {
base.InitializeCell(cell, columnIndex, itemType);
if ((itemType != ListItemType.Header) &&
(itemType != ListItemType.Footer)) {
WebControl buttonControl = null;
if (ButtonType == ButtonColumnType.LinkButton) {
LinkButton button = new DataGridLinkButton();
button.Text = Text;
button.CommandName = CommandName;
button.CausesValidation = CausesValidation;
button.ValidationGroup = ValidationGroup;
buttonControl = button;
}
else {
Button button = new Button();
button.Text = Text;
button.CommandName = CommandName;
button.CausesValidation = CausesValidation;
button.ValidationGroup = ValidationGroup;
buttonControl = button;
}
if (DataTextField.Length != 0) {
buttonControl.DataBinding += new EventHandler(this.OnDataBindColumn);
}
cell.Controls.Add(buttonControl);
}
}
/// <devdoc>
/// </devdoc>
private void OnDataBindColumn(object sender, EventArgs e) {
Debug.Assert(DataTextField.Length != 0, "Shouldn't be DataBinding without a DataTextField");
Control boundControl = (Control)sender;
DataGridItem item = (DataGridItem)boundControl.NamingContainer;
object dataItem = item.DataItem;
if (textFieldDesc == null) {
string dataField = DataTextField;
textFieldDesc = TypeDescriptor.GetProperties(dataItem).Find(dataField, true);
if ((textFieldDesc == null) && !DesignMode) {
throw new HttpException(SR.GetString(SR.Field_Not_Found, dataField));
}
}
string dataValue;
if (textFieldDesc != null) {
object data = textFieldDesc.GetValue(dataItem);
dataValue = FormatDataTextValue(data);
}
else {
Debug.Assert(DesignMode == true);
dataValue = SR.GetString(SR.Sample_Databound_Text);
}
if (boundControl is LinkButton) {
((LinkButton)boundControl).Text = dataValue;
}
else {
Debug.Assert(boundControl is Button, "Expected the bound control to be a Button");
((Button)boundControl).Text = dataValue;
}
}
}
}
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