为什么不尝试{} catch {}在C#中工作? [英] Why doesn't try {} catch{} work in C#?

问题描述

我在Visual Studio的程序中有一个 try {} catch {} 块.在 try {} 块中，我具有连接到DB的代码，当我运行该程序时，它将返回错误.在这种情况下，程序必须执行 catch {} 块，但是 try {} 块会返回错误，程序会停止.

I have a try{} catch{} block in my program in Visual Studio. In the try{} block I have code to connect to a DB and when I run that program it returns an error. In this situation the program must execute the catch{} block, but an error is returned from the try{} block and the program stops.

try {
  using (OracleConnection cn = new OracleConnection(DataBase.EDS_SDE_Connection)) {
    cn.Open();
    using (OracleCommand cm = cn.CreateCommand()) {
      cm.CommandType = CommandType.StoredProcedure;
      cm.CommandText = "EDS_FEAUTRE_CLASSES.DIS_ENA_TRG_LOG";
      OracleParameter oParam = new OracleParameter("PISDISABLE", OracleDbType.Decimal);
      oParam.Direction = ParameterDirection.Input;
      oParam.Value = pIsDisable;
      cm.Parameters.Add(oParam);
      cm.ExecuteNonQuery();
    }
  }
  bRet = true;
} catch (Exception ex) {
  ClsShares.ShowMessage("", ex.Message);
  bRet = false;
}

那是下面突出显示的chekbox的消息:

That's was from bellow highlighted chekbox:

推荐答案

默认情况下，并非所有异常类型都启用来破坏解决方案.您可以从异常设置"窗口中选择启用的选项，如上图所示.设置要抛出的CLR异常.这样便会破坏代码(如果没有try/catch的话)，或者在您的情况下，try序列会中断，并且catch块将被执行.

Not all exception types are enabled to break the solution by default. You can choose which are enabled from the Exception Setting window as you show above in the image. Set the CLR exceptions set to be thrown. That's how the code will break (if there is no a try/catch) or in your case the try sequence will break and the catch block will be executed.

对于不同的IDE:

VS2015: Debug -> Windows -> Exception Settings.

VS2012: Debug -> Exceptions more details

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