我可以在ASMX JSON服务上设置HTTP响应代码并引发异常吗?

Mar*_*kus 9 asp.net error-handling asmx http-status-codes webmethod

在响应JSON的ASP.NET ASMX WebMethod中,我是否可以抛出异常并设置HTTP响应代码?我想如果我抛出一个HttpException,状态代码将被适当地设置,但它不能使服务响应除500错误之外的任何东西.

我尝试过以下方法:

[WebMethod]
[ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public void TestWebMethod() {
    throw new HttpException((int)HttpStatusCode.BadRequest, "Error Message");
}
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也:

[WebMethod]
[ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public void TestWebMethod() {
    try {
        throw new HttpException((int)HttpStatusCode.BadRequest, "Error Message");
    }
    catch ( HttpException ex ) {
        Context.Response.StatusCode = ex.GetHttpCode();
        throw ex;
    }
}
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这些都回应500.

非常感谢.

Rui*_*ues 4

将您的代码更改为:

[WebMethod]
[ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public void TestWebMethod() {
    try {
        throw new HttpException((int)HttpStatusCode.BadRequest, "Error Message");
    }
    catch ( HttpException ex ) {
        Context.Response.StatusCode = ex.GetHttpCode();

        // See Markus comment
        // Context.Response.StatusDescription("Error Message");
        // Context.Response.StatusDescription(ex.Message); // exception message
        // Context.Response.StatusDescription(ex.ToString()); // full exception
    }
}
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基本上你不能,也就是说,当抛出异常时,结果将始终是相同的 500。