Question

我正在开始我的第一次ASP.NET任务。这是一个网站，我在Visual Studio工作。

我无法弄清楚如何在ExecuteNonQuery失败时显示详细的错误消息。

我正在使用OleDb连接，所以我的猜测是我必须使用OleDbException或OleDbError来获取详细的错误消息。

基本上，问题是 - 如何更新此代码以获得IF ExecuteNonQuery失败的详细错误消息？

string v1 = Request["v1"];                                    
string v2 = Request["v2"];
sql2 = "INSERT INTO table(one, two) VALUES('" + v1 + "', '" + v2  + "')";

System.Data.OleDb.OleDbConnection con2 = new System.Data.OleDb.OleDbConnection();
con2.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data          Source=C:/Users/BB/Desktop/Database.mdb";
con2.Open();
OleDbCommand command = new OleDbCommand(sql2, con2);

try
{
    command.ExecuteNonQuery();
}
catch
{
    Response.Write("Error!");
    // detailed error message here?
}

Answer 1

将您的catch更改为catch (Exception ex)，然后您可以使用Response.Write(ex.Message)

理想情况下，对于不同的异常类型，您会有不同的捕获。这是一种捕获所有异常的桶方法。

Answer 2

更改捕获以捕获（SqlException ex）和catch（异常Exception）

        catch (SqlException ex)
        {
            StringBuilder errorMessages = new StringBuilder();
            for (int i = 0; i < ex.Errors.Count; i++)
            {
                errorMessages.Append("Index #......" + i.ToString() + Environment.NewLine +
                                     "Message:....." + ex.Errors[i].Message + Environment.NewLine +
                                     "LineNumber:.." + ex.Errors[i].LineNumber + Environment.NewLine);
            }
            WriteToLog(FileLog, "SQL Error message: " + errorMessages.ToString() + Environment.NewLine);
            WriteToLog(FileLog, "Process has been finished with errors." + Environment.NewLine);
        }
        catch (Exception ex)
        {
            WriteToLog(FileLog, "Error message: " + ex.Message + Environment.NewLine);
            WriteToLog(FileLog, "Error stack trace: " + ex.StackTrace + Environment.NewLine);
            WriteToLog(FileLog, "Process has been finished with errors." + Environment.NewLine);

如何获取详细的ExecuteNonQuery错误消息？

2 个答案: