嘗試鎖定變量時檢測到死鎖。 16次嘗試後無法獲取鎖定。鎖定超時

Question

我試圖在使用SSIS的電子郵件中發送一組查詢結果。以下是流程的截圖和步驟。

截圖：

步驟：1. 使用SQL任務中獲得的 「QueryResult中的」 查詢結果對象變量 2.在foreach循環中使用 「QueryResult中」 對象變量並獲得列值的字符串變量「ProjectRefID」和「賬戶號碼」

3，採用得離譜的foreach循環容器內PT任務以捕獲對象變量「查詢結果」的數據

下面是這是我從複製的腳本任務中的代碼互聯網。

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

endregion

namespace ST_77e6b4ea18824b909adc5568475fcf5c 
{ 

    [Microsoft.SqlServer.Dts.Tasks.ScriptTask.SSISScriptTaskEntryPointAttribute] 
public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase 



{ 

    public void Main() 
    { 
     Variables varCollection = null; 
     string header = string.Empty; 
     string message = string.Empty; 

     Dts.VariableDispenser.LockForWrite("User::ValidationEmailMessage"); 
     Dts.VariableDispenser.LockForRead("User::Accountnumber"); 
     Dts.VariableDispenser.LockForRead("User::ProjectRefID"); 
     Dts.VariableDispenser.GetVariables(ref varCollection); 

     if (varCollection["User::ValidationEmailMessage"].Value == string.Empty) 
     { 
      header = "Below are the list of Invalid ProjecRefID and Accountnumbers that are not matching with our existing data:\n\n"; 
      header += string.Format("{0}\t{1}\t\t\t{2}\n", "ProjectRefID", "Accountnumber"); 
      varCollection["User::ValidationEmailMessage"].Value = header; 
      varCollection.Unlock(); 
     } 


     //Format the query result with tab delimiters 
     message = string.Format("{0}\t{1}\t{2}", 
            varCollection["User::ProjectRefID"].Value, 
            varCollection["User::Accountnumber"].Value); 

     varCollection["User::ValidationEmailMessage"].Value = varCollection["User::ValidationEmailMessage"].Value + message; 
     varCollection.Unlock(); 
     Dts.TaskResult = (int)ScriptResults.Success; 

    } 


    enum ScriptResults 
    { 
     Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success, 
     Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure 
    }; 


} 

}

我試圖解決這個錯誤，但不知何故，我無法想出解決辦法。讓我知道是否有人知道如何解決它。

Answer 1

除非你需要某種原因鎖定功能，你應該能夠簡單地寫了主要方法是：

public void Main() 
{ 
    string header = string.Empty; 
    string message = string.Empty; 

    if (Dts.Variables["User::ValidationEmailMessage"].Value == string.Empty) 
    { 
     header = "Below are the list of Invalid ProjecRefID and Accountnumbers that are not matching with our existing data:\n\n"; 
     header += string.Format("{0}\t{1}\t\t\t{2}\n", "ProjectRefID", "Accountnumber"); 
     Dts.Variables["User::ValidationEmailMessage"].Value = header; 
    } 


    //Format the query result with tab delimiters 
    message = 
     string.Format("{0}\t{1}\t{2}", 
      Dts.Variables["User::ProjectRefID"].Value, 
      Dts.Variables["User::Accountnumber"].Value); 

    Dts.Variables["User::ValidationEmailMessage"].Value = Dts.Variables["User::ValidationEmailMessage"].Value + message; 

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

另外，與你的string.Format代碼，您指定三個指標，{0} ，{1}和{2}，但您只提供2個參數，例如，, "ProjectRefID", "Accountnumber");。