在构造之后设置Execption消息 [英] Setting Execption messager after construction
问题描述
我需要在已构造的Exception上设置异常消息。
有没有办法实现这个目标？
Psudo代码：
公共类MyException：Exception {
public MyException（Hashtable myData）：base（" dummy"）{
foreach（myData.Keys中的字符串sTemp）{
this.Message + =" ;，" + sTemp;
}
}
}
使用这样：
Hashtable myData = new Hashtable（）;
myData.Add（" car"，4）;
myData.Add（" truck"，6）;
抛出新的MyException（myData）;
Rasmus写道：I需要在已经构造的异常上设置异常消息。有没有办法实现这个？
System.Exception中的消息字段是内部的，所以没有办法
更改它来自另一个集会。你可以做的一件事是创建一个类
，为你的例外类型生成消息：
class MyExceptionMessageBuilder {
private字符串消息;
public MyExceptionMessageBuilder（Hashtable params）{
//从params构建消息
this.message = ...
}
公共字符串消息{
get {return this.message; }
}
干杯，
-
Joerg Jooss
jo ********* @ gmx.net
您好，
消息是一个只读属性，您无法更改它，并且您没有
访问成员变量。 />
您可以做的是覆盖Message属性。只需添加一个字符串变量
，用你的哈希表构建并按照描述修改消息。
关于这个的坏处是在一个catch（Exception）你不会得到你的
自定义消息，但Exception'的生成一个，访问你的意志
需要捕获（MyException）
也许有人可以解释为什么MS不允许访问组成Message属性的变量
实例（如果有的话）。
干杯，
-
Ignacio Machin，
ignacio.machin at dot.state.fl.us
佛罗里达州交通局
Rasmus <太阳神**** @ nospam.nospam>在消息中写道
新闻：7A ********************************** @ microsof t.com ...我需要在已构造的Exception上设置异常消息。
有没有办法实现这个目标？
Psudo代码：
public class MyException：Exception {
public MyException（Hashtable myData）：base（" dummy" ）{
foreach（myData.Keys中的字符串sTemp）{
this.Message + ="，" + sTemp;
}
}
}
像这样使用：
Hashtable myData = new Hashtable（）;
myData.Add（ car，4）;
myData.Add（" truck"，6）;
抛出新的MyException（myData）;
感谢您的帖子。
您能提供代码示例吗？
I need to set the exception message on an already constructed Exception. Is
there a way to accomplish this?
Psudo Code:
public class MyException : Exception {
public MyException (Hashtable myData) : base ("dummy") {
foreach (string sTemp in myData.Keys){
this.Message += "," + sTemp;
}
}
}
USE LIKE THIS :
Hashtable myData = new Hashtable();
myData.Add("car",4);
myData.Add("truck",6);
throw new MyException(myData);
Rasmus wrote:I need to set the exception message on an already constructed
Exception. Is there a way to accomplish this?
The message field in System.Exception is internal, so there''s no way
changing it from another assembly. One thing you can do is create a class
that produces the messages for your exception type:
class MyExceptionMessageBuilder {
private string message;
public MyExceptionMessageBuilder(Hashtable params) {
// Build message from params
this.message = ...
}
public string Message {
get { return this.message; }
}
Cheers,
--
Joerg Jooss
jo*********@gmx.net
Hi,
Message is a read only property, you cannot change it, and you dont have
access to the member variable.
What you can do is override Message property. just add a string variable
that you build with your hashtable and modify Message as described.
The bad thing about this is in a catch(Exception ) you will not get your
custom message, but the Exception''s generated one, to access your youwill
need to catch ( MyException )
Maybe somebody can explain why MS does not allow access to the variable
instance ( if any exist ) that make up Message property.
Cheers,
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"Rasmus" <Ra****@nospam.nospam> wrote in message
news:7A**********************************@microsof t.com...I need to set the exception message on an already constructed Exception. Is there a way to accomplish this?
Psudo Code:
public class MyException : Exception {
public MyException (Hashtable myData) : base ("dummy") {
foreach (string sTemp in myData.Keys){
this.Message += "," + sTemp;
}
}
}
USE LIKE THIS :
Hashtable myData = new Hashtable();
myData.Add("car",4);
myData.Add("truck",6);
throw new MyException(myData);
Thanks for the post.
Could you provide a code sample?
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