本文整理汇总了C#中System.Web.UI.WebControls.DataControlField类的典型用法代码示例。如果您正苦于以下问题：C# DataControlField类的具体用法？C# DataControlField怎么用？C# DataControlField使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
DataControlField类属于System.Web.UI.WebControls命名空间，在下文中一共展示了DataControlField类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: RadioButtonField
namespace Samples.AspNet.CS {
using System;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
[AspNetHostingPermission(SecurityAction.Demand,
Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class RadioButtonField : CheckBoxField {
public RadioButtonField() {
}
// Gets a default value for a basic design-time experience.
// Since it would look odd, even at design time, to have
// more than one radio button selected, make sure that none
// are selected.
protected override object GetDesignTimeValue() {
return false;
}
// This method is called by the ExtractRowValues methods of
// GridView and DetailsView. Retrieve the current value of the
// cell from the Checked state of the Radio button.
public override void ExtractValuesFromCell(IOrderedDictionary dictionary,
DataControlFieldCell cell,
DataControlRowState rowState,
bool includeReadOnly)
{
// Determine whether the cell contains a RadioButton
// in its Controls collection.
if (cell.Controls.Count > 0) {
RadioButton radio = cell.Controls[0] as RadioButton;
object checkedValue = null;
if (null == radio) {
// A RadioButton is expected, but a null is encountered.
// Add error handling.
throw new InvalidOperationException
("RadioButtonField could not extract control.");
}
else {
checkedValue = radio.Checked;
}
// Add the value of the Checked attribute of the
// RadioButton to the dictionary.
if (dictionary.Contains(DataField))
dictionary[DataField] = checkedValue;
else
dictionary.Add(DataField, checkedValue);
}
}
// This method adds a RadioButton control and any other
// content to the cell's Controls collection.
protected override void InitializeDataCell
(DataControlFieldCell cell, DataControlRowState rowState) {
RadioButton radio = new RadioButton();
// If the RadioButton is bound to a DataField, add
// the OnDataBindingField method event handler to the
// DataBinding event.
if (DataField.Length != 0) {
radio.DataBinding += new EventHandler(this.OnDataBindField);
}
radio.Text = this.Text;
// Because the RadioButtonField is a BoundField, it only
// displays data. Therefore, unless the row is in edit mode,
// the RadioButton is displayed as disabled.
radio.Enabled = false;
// If the row is in edit mode, enable the button.
if ((rowState & DataControlRowState.Edit) != 0 ||
(rowState & DataControlRowState.Insert) != 0) {
radio.Enabled = true;
}
cell.Controls.Add(radio);
}
}
}