SSIS 脚本任务抛出 Object 引用未设置为 object 的实例

Question

我正在尝试查询数据库并将内容发送到 email 的正文中。 当我尝试运行 package 时，它会引发死锁错误。 谁能建议我错过了什么

脚本如下

#region Namespaces
using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
using System.Linq;
using System.Collections.Generic;
using System.Collections;
using System.Data.OleDb;
using System.Net.Mail;
using System.Net;
#endregion

namespace ST_c074d0acfee7488b96d42a0f858efee7
{
    [Microsoft.SqlServer.Dts.Tasks.ScriptTask.SSISScriptTaskEntryPointAttribute]
    public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
    {

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

        public void Main()
        {
            Variables varCollection = null;

            string User_Recepient_Email_ID = Dts.Variables["User::UserEml"].Value.ToString();

            //Dts.VariableDispenser.LockForWrite("User::EmailData");
            //Dts.VariableDispenser.GetVariables(ref varCollection);
            var data = varCollection["User::EmailData"].Value;

            OleDbDataAdapter da = new OleDbDataAdapter();
            DataTable dt = new DataTable();
            da.Fill(dt, varCollection["User::EmailData"].Value);

            SendMailMessage("loadJob@xyz.com", User_Recepient_Email_ID, "ETL Load Status Report", ConvertDataTableToHTML(dt), true, "smtp.xxxxxxxxxxxxx.org");

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


        public static string ConvertDataTableToHTML(DataTable dt)
        {
            string html = "<table border ='1'>";
            //add header row
            html += "<tr>";
            for (int i = 0; i < dt.Columns.Count; i++)
                html += "<th>" + dt.Columns[i].ColumnName + "</th>";
            html += "</tr>";
            //add rows
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                html += "<tr style='color:blue;'>";
                for (int j = 0; j < dt.Columns.Count; j++)
                    html += "<td>" + dt.Rows[i][j].ToString() + "</td>";
                html += "</tr>";
            }
            html += "</table>";
            return html;
        }
        private void SendMailMessage(string From, string SendTo, string Subject, string Body, bool IsBodyHtml, string Server)
        {
            MailMessage htmlMessage;
            SmtpClient mySmtpClient;

            htmlMessage = new MailMessage(From, SendTo, Subject, Body);
            htmlMessage.IsBodyHtml = IsBodyHtml;

            mySmtpClient = new SmtpClient(Server);
            mySmtpClient.Credentials = CredentialCache.DefaultNetworkCredentials;
            mySmtpClient.Send(htmlMessage);
        }
    }
}

下面是

package 如下所示。对于每个用户，我需要获取所有订单和订单详细信息并将其作为 email 发送给他们。 所以我在循环中有脚本

早些时候我遇到了死锁错误，我改变了一些关于不同文章的东西，现在我遇到了错误

Error: 0x1 at Script Task: Object reference not set to an instance of an object.
Task failed: Script Task
Warning: 0x80019002 at Foreach Loop each User: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED.  The Execution method succeeded, but the number of errors raised (1) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
Warning: 0x80019002 at SurplusMouse_EmailOrderDetail: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED.  The Execution method succeeded, but the number of errors raised (1) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
SSIS package 

Answer 1

我的猜测是这是您的错误（varCollection 是 null 并且您引用的是空值）：

var data = varCollection["User::EmailData"].Value;

就像你之前做的那样分配它......

var data = Dts.Variables["User::EmailData"].Value;

但是，我认为你正在尝试这个。 Email 数据是存储在 object 中的记录集。 这是你想要的逻辑。

using System.Data.OleDb;

DataTable dt= new DataTable();
OleDbDataAdapter adapter = new OleDbDataAdapter();
adapter.Fill(dt, Dts.Variables["User::emailData"].Value);

foreach (DataRow row in dt.Rows)
{
   //insert what you want to do here
}