本文整理汇总了C#中System.Web.Compilation.ExpressionPrefixAttribute类的典型用法代码示例。如果您正苦于以下问题：C# ExpressionPrefixAttribute类的具体用法？C# ExpressionPrefixAttribute怎么用？C# ExpressionPrefixAttribute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。
ExpressionPrefixAttribute类属于System.Web.Compilation命名空间，在下文中一共展示了ExpressionPrefixAttribute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: GetEvalData
//引入命名空间
using System;
using System.CodeDom;
using System.Web.UI;
using System.ComponentModel;
using System.Web.Compilation;
using System.Web.UI.Design;
// Apply ExpressionEditorAttributes to allow the
// expression to appear in the designer.
[ExpressionPrefix("MyCustomExpression")]
[ExpressionEditor("MyCustomExpressionEditor")]
public class MyExpressionBuilder : ExpressionBuilder
{
// Create a method that will return the result
// set for the expression argument.
public static object GetEvalData(string expression, Type target, string entry)
{
return expression;
}
public override object EvaluateExpression(object target, BoundPropertyEntry entry,
object parsedData, ExpressionBuilderContext context)
{
return GetEvalData(entry.Expression, target.GetType(), entry.Name);
}
public override CodeExpression GetCodeExpression(BoundPropertyEntry entry,
object parsedData, ExpressionBuilderContext context)
{
Type type1 = entry.DeclaringType;
PropertyDescriptor descriptor1 = TypeDescriptor.GetProperties(type1)[entry.PropertyInfo.Name];
CodeExpression[] expressionArray1 = new CodeExpression[3];
expressionArray1[0] = new CodePrimitiveExpression(entry.Expression.Trim());
expressionArray1[1] = new CodeTypeOfExpression(type1);
expressionArray1[2] = new CodePrimitiveExpression(entry.Name);
return new CodeCastExpression(descriptor1.PropertyType, new CodeMethodInvokeExpression(new
CodeTypeReferenceExpression(base.GetType()), "GetEvalData", expressionArray1));
}
public override bool SupportsEvaluate
{
get { return true; }
}
}