三层异常处理 [英] Three tier exception handling

问题描述

大家好，

任何人都可以帮我处理三层架构中的异常处理，

对于一个实例

我有价值从UI并发送到中间层，其中验证值，如果验证失败，则抛出异常。

如何向特定页面显示该异常，并显示错误消息。



问题实例



UI（invoiceUI.aspx）

Hello All ,
Can any one help me with Exception Handling in three Tier Architecture,
For An instance
I am taking value from UI and sending to Middle tier where the value is validated and if validation fails it throws a exception.
How can i show that exception to a particular page with error message.

Instance of problem

UI(invoiceUI.aspx)

 protected void Button1_Click(object sender, EventArgs e)
        {
            invoice objinvoice = new invoice();
            getdata(objinvoice);
        }



public void getdata(invoice objinvoice)
        {
             
            objinvoice.fname = fname.Text;
                 
        }

中间层（invoice.cs）

Middle Tier (invoice.cs)

 private string _fname;

public string fname
       {
           set
           {
               if (value.Length == 0)
               {
                   throw new Exception("Please Enter the Valid Name");
               }
               _fname = value;
           }
           get
           {
               return _fname;
           }
       }

怎么做，请帮助。



我尝试了什么：



i试图在UI中获取异常

how to do this , help is appreciated.

What I have tried:

i have tried putting to get the exception in UI which do not work

推荐答案

你的代码会变成这样的：

Your code would become something like this:

public void getdata(invoice objinvoice)
        {
            try {
                objinvoice.fname = fname.Text;
            } catch (Exception ex) {
                lblMessage.Text = ex.Message;
            }
        }

lblMessage 是一个标签控制，您可以用几乎任何可以显示文本的东西替换它。

lblMessage is a Label control, you can replace it with pretty much anything that can display text.

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