c# - Exception变量是什么数据类型？

Question

我运行的代码需要使用以下代码将异常保存到SQL Server数据库中：

    public void AcieveSomething()
    {
       //Datatype Declarations 
        string ApplicationName = "App_Name";
        string ClassName = "Class_Name";
        string MethodName = "Achieve Something";

       try
       {
         //Main part of the code
       }

       catch(Exception ex)
       {
         //Calling function to input the error into DB
          ErrorLog.WriteErrorLog(ex, ApplicationName, ClassName, MethodName);
       }
   }

如果要将ex值放入数据库，SQL Server数据库中Exception ex;的数据类型是什么？

Answer 1

正如@Liath所说，Exception继承自System.Object。从数据库返回的任何错误或警告通常将为SqlException类型。

理想的做法是将Exception对象序列化为XML，并将其作为XML存储在数据库中。

为此，最好创建自己的Exception类型来封装要存储的信息，如下所示：

[Serializable]
public class StorableException
{
    public DateTime TimeStamp { get; set; }
    public string Message { get; set; }
    public string StackTrace { get; set; }

    public StorableException()
    {
        this.TimeStamp = DateTime.Now;
    }

    public StorableException(string Message) : this()
    {
        this.Message = Message;
    }

    public StorableException(System.Exception ex) : this(ex.Message)
    {
        this.StackTrace = ex.StackTrace;
    }

    public override string ToString()
    {
        return this.Message + this.StackTrace;
    }
}

然后，您可以执行以下操作：

catch(Exception ex)
{
    StorableException s = new StorableException(ex);

    //now we can serialize it
    XmlSerializer xsSubmit = new XmlSerializer(typeof(StorableException));
    StringWriter sww = new StringWriter();
    XmlWriter writer = XmlWriter.Create(sww);
    xsSubmit.Serialize(writer, s);
    var xml = sww.ToString();

    //now save the xml file to a column in your database

    ErrorLog.WriteErrorLog(ex, ApplicationName, ClassName, MethodName);
}