SSIS脚本任务错误消息

Question

运行SSIS包时，我收到以下错误消息。 脚本任务正在​​使用Microsoft Visual C# 2008 。 您能帮我解决问题吗？

非常感谢你！ 我还附上错误消息：

Error: 2015-12-22 02:58:08.28
   Code: 0x00000001
   Source: Script Task 
   Description: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidOperationException: Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation. Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application.
   at System.Windows.Forms.MessageBox.ShowCore(IWin32Window owner, String text, String caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton, MessageBoxOptions options, Boolean showHelp)
   at System.Windows.Forms.MessageBox.Show(String text)
   at ST_d27b216cd7d64713b54c81f6ac28d805.csproj.ScriptMain.Main()
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
   at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams)
   at System.Type.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args, CultureInfo culture)
   at Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTATaskScriptingEngine.ExecuteScript()
End Error
DTExec: The package execution returned DTSER_FAILURE (1).

C＃代码：

using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;

namespace ST_d27b216cd7d64713b54c81f6ac28d805.csproj
{
    [System.AddIn.AddIn("ScriptMain", Version = "1.0", Publisher = "", Description = "")]
    public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
    {

        #region VSTA generated code
        enum ScriptResults
        {
            Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
            Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
        };
        #endregion

        public void Main()
        {
            // TODO: Add your code here
            System.IO.FileInfo fi;
            String FilePath = null;

            DateTime ModifiedTime = (DateTime)Dts.Variables["File_Modified"].Value;


            DateTime LoadDate = (DateTime)Dts.Variables["File_Last_Load_Date"].Value;

            Dts.Variables["isModified"].Value = false;


            FilePath = Dts.Variables["SourceFolder"].Value.ToString();
            ModifiedTime = System.IO.File.GetLastWriteTime(FilePath);

            Dts.Variables["File_Modified"].Value = ModifiedTime; 
            // fi.LastWriteTime;
            int result = DateTime.Compare(ModifiedTime, LoadDate);

            if (result > 0)
            {
                  MessageBox.Show("File Modified after last load in staging");
                Dts.Variables["isModified"].Value = true;
            }
            else
            {
               MessageBox.Show("file is not modified since last load");
                Dts.Variables["isModified"].Value = false;
            }

            Dts.TaskResult = (int)ScriptResults.Success;
        }
    }
}

Answer 1

引发错误是因为您的脚本任务试图在应用程序不在UserInteractive模式下运行时试图显示消息框并显示模式对话框或窗体不是有效操作。 因此，如果要输出消息，可以改用Dts.Log ，请参阅MSDN文档以获取更多详细信息。

Answer 2

从堆栈跟踪中提取的错误消息是：

当应用程序不在UserInteractive模式下运行时，显示模式对话框或窗体是无效操作。 指定ServiceNotification或DefaultDesktopOnly样式以显示来自服务应用程序的通知。

您必须记住，尽管在调试SSIS软件包时，您有一个不错的UI（BIDS或SQL Server Tools Shells取决于您的环境），但实际上它并不是设计成具有UI的。 当此程序包部署到服务器并由SQL Job调用时，您会期望发生什么？ 即消息框将显示在哪里？ 谁将单击“确定”以允许线程恢复？

如果您希望发布反馈，则可能只想触发一个信息事件 ，例如：

bool fireAgain = false;
Dts.Events.FireInformation(0, "Script Task", "File Modified after last load in staging", String.Empty, 0, ref fireAgain);