本文整理汇总了C#中System.Web.UI.Design.ExpressionEditor类的典型用法代码示例。如果您正苦于以下问题：C# ExpressionEditor类的具体用法？C# ExpressionEditor怎么用？C# ExpressionEditor使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
ExpressionEditor类属于System.Web.UI.Design命名空间，在下文中一共展示了ExpressionEditor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: EvaluateExpression
//引入命名空间
using System;
using System.Collections;
using System.Collections.Specialized;
using System.CodeDom;
using System.Configuration;
using System.Web.UI.Design;
using System.Web.Compilation;
namespace ExpressionEditorSamples.CS
{
[ExpressionPrefix("CustomAppSettings")]
[ExpressionEditor(typeof(ExpressionEditorSamples.CS.CustomAppSettingsEditor))]
public class CustomAppSettingsBuilder : AppSettingsExpressionBuilder
{
// Use the built-in AppSettingsExpressionBuilder class,
// but associate it with a custom expression editor class.
}
public class CustomAppSettingsEditor : System.Web.UI.Design.ExpressionEditor
{
public override object EvaluateExpression(string expression, object parseTimeData, Type propertyType, IServiceProvider serviceProvider)
{
KeyValueConfigurationCollection customSettings = null;
if (serviceProvider != null)
{
IWebApplication webApp = (IWebApplication)serviceProvider.GetService(typeof(IWebApplication));
if (webApp != null)
{
Configuration config = webApp.OpenWebConfiguration(true);
if (config != null)
{
AppSettingsSection settingsSection = config.AppSettings;
if (settingsSection != null)
{
customSettings = settingsSection.Settings;
}
}
}
}
if (customSettings != null)
{
return customSettings[expression];
}
return expression;
}
}
}