RuleValidation 類別

定義

public ref class RuleValidation

public class RuleValidation

type RuleValidation = class

Public Class RuleValidation

繼承

Object

RuleValidation

範例

以下程式碼會產生一個無效條件。 接著嘗試驗證條件，並顯示產生的錯誤。

// Create an invalid condition ("abc" < true).  
CodeBinaryOperatorExpression invalidCompare = new CodeBinaryOperatorExpression();  
invalidCompare.Left = new CodePrimitiveExpression("abc");  
invalidCompare.Operator = CodeBinaryOperatorType.LessThan;  
invalidCompare.Right = new CodePrimitiveExpression(true);  
RuleExpressionCondition condition = new RuleExpressionCondition();  
condition.Expression = invalidCompare;  

// Create a validator for this condition.  
// We are not using "this" in the condition, so the type is not used.  
RuleValidation validation = new RuleValidation(this.GetType(), null);  

// See whether the condition validates.  
if (!condition.Validate(validation))  
{  
    // There were errors, so display them.  
    foreach (ValidationError error in validation.Errors)  
    {  
        Console.WriteLine(error.ErrorText);  
    }  
}  

執行此程式碼會產生以下錯誤：

Relational operator "LessThan" cannot be used on operands of types "string" and "bool".