从SqlDataReader中检索INSERT语句的底层异常

时间:2011-11-05 17:18:24

标签: c# .net sql-server ado.net

我正在执行一个SQL插入语句,例如

INSERT INTO Table (fk1, value1) OUTPUT inserted.pk VALUES ('fkv1', 'v1');

其中“pk”是自动递增的键值,如:

SqlDataReader reader = cmd.ExecuteReader();

外键与父表冲突,而reader.HasRows()反映了这一点,但是如何检索与错误描述一起抛出的实际异常对象?如果删除“OUTPUT”语句,它会抛出异常,但是在那里使用该语句,它会吞下错误,然后返回“HasRows”== false。

我可以在“结果视图”属性下使用调试器看到错误,但是如何在代码中获取此值?

Sql Server 2008r2 .NET 4.0

感谢您的帮助。

编辑:

此调用不会引发异常。它没有成功完成的唯一迹象是“HasRows”是错误的。

2 个答案:

答案 0 :(得分:3)

try
{
   SqlDataReader reader = cmd.ExecuteReader();
}
catch(Exception ex)
{
   string errorMessage = String.Format(CultureInfo.CurrentCulture, 
                         "Exception Type: {0}, Message: {1}{2}", 
                         ex.GetType(),
                         ex.Message,
                         ex.InnerException == null ? String.Empty : 
                         String.Format(CultureInfo.CurrentCulture,
                                      " InnerException Type: {0}, Message: {1}",
                                      ex.InnerException.GetType(),
                                      ex.InnerException.Message));

  System.Diagnostics.Debug.WriteLine(errorMessage);
}

答案 1 :(得分:0)

我有一块sql正在生成一个异常但是try catch没有捕获它 - 它太奇怪了!

这是代码

try
{
    // Run the SQL statement, and then get the returned rows to the DataReader.

    SqlDataReader MyDataReader = MyCommand.ExecuteReader();

    //note AT THIS POINT there is an exception in MyDataReader
    //if I view MyDataReader in Watch I see this in base->ResultsView->base
    //Conversion failed when converting the varchar value 'lwang' to data type int
    //and errors count is 1 but there is no exception catch!!

    int iRow = 0;
    if (MyDataReader.HasRows)
    {
        int iCol = 0;
        while (MyDataReader.Read())
        {

            //dt.Load(MyDataReader);
            List<String> strFields = new List<String>();

            for (int iField = 0; iField < MyDataReader.FieldCount; iField++)
            {
                strReturn = strReturn + MyDataReader[iField] + ",";
                strFields.Add(MyDataReader[iField].ToString());
            }
            DataRows.Add(strFields);
            iRow++;
        }
    }
}
catch (Exception ex)
{
    //no exception is caught in this case!!  This code is never reached!!
    strError = "An error occurred getting the data table: " + MyCommand.CommandText + " " + ex.ToString();
    throw new Exception(strError);
    return (DataRows);
}
finally
{
    Connection.Close();
}
    return (DataRows);
}

如果它有帮助,那么正在执行的sql 正在执行的sql是:

  

选择   hec_recommendation.RecID,hec_recommendation.UtilityID,hec_recommendation.CatID,hec_recommendation.Condition,hec_recommendation.RecommendationText,hec_recommendation.Active,hec_recommendation.Ordinal,hec_recommendation.StartDate,hec_recommendation.EndDate,hec_recommendation.CreateDate,hec_recommendation.CreatedByID,hec_recommendation.ModifyDate,hec_recommendation。 ModifyByID   来自hec_recommendation,hec_utility,hec_reccategory在哪里   hec_recommendation.utilityid = hec_utility.id和   hec_recommendation.catid = hec_reccategory.catid和   hec_reccategory.utilityid = hec_utility.utilityid和   hec_utility.utilityId ='lwang'