在SSIS中显示foreach循环迭代次数 [英] Display foreach loop iteration number in SSIS

问题描述

我需要检查在Visual Studio 2017中运行的foreach循环容器任务的迭代编号.如何实现此目标?

I need to keep a check on the iteration number for a foreach loop container task that I am running in Visual Studio 2017. How could I achieve this ?

推荐答案

(1)使用表达式任务计算迭代次数

SSIS 2012+中可用的任务

在Foreach循环容器中，

In Foreach Loop container, there is no properties that contains the iteration number. You can achieve this by creating a SSIS variable of type Int, with a initial value equal 0. example @[User::Counter]

在Foreach循环容器内，添加具有以下表达式的Expression Task:

Inside the Foreach loop container, add an Expression Task with the following expression:

@[User::Counter] = @[User::Counter] + 1

有用的链接

• SSIS表达任务
• 表达任务

• SSIS Expression Task
• Expression Task

您可以使用脚本任务来完成相同的过程，方法是创建计数器变量，在脚本任务中将其选择为ReadWrite变量，然后在脚本内部向主函数中添加类似的行:

You can achieve the same process using a Script Task, by creating the counter variable, select it as ReadWrite Variable in the Script Task, and inside the script add a similar line into the Main Function:

Dts.Variables["User::Counter"].Value = Convert.ToInt32(Dts.Variables["User::Counter"].Value) + 1;

参考

• 在脚本任务中使用SSIS变量和参数

• Increment a variable within a Foreach Loop and use it-SSIS
• Use SSIS Variables and Parameters in a Script Task

有多种显示数据的方式.一种是使用脚本任务.指定您的@[User::Counter]变量位于ReadOnly集合中，然后将该值发送到运行日志中

There are different ways of displaying data. One is to use a script task. Specify your @[User::Counter] variable is in the ReadOnly collection and then emit the value into the run log

    public void Main()
    {
        bool fireAgain = false;
        string message = "{0}::{1} : {2}";
        foreach (var item in Dts.Variables)
        {
            Dts.Events.FireInformation(0, "SCR Echo Back", string.Format(message, item.Namespace, item.Name, item.Value), string.Empty, 0, ref fireAgain);
        }

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

另一种方法是通过表达式在Foreach循环内设置Task的Name属性.在循环中的任务上单击鼠标右键，然后选择属性".在属性"部分中找到[+]Expressions集合，然后单击右侧的省略号...，然后在新窗口中，选择左侧的名称"，并将右侧的表达式设置为

A different approach would be to set the Name property of a Task within the Foreach Loop via an expression. Right-click on a Task within the Loop and select Properties. Find the [+]Expressions collection in the Properties section and click the right side ellipses ... and in the new window, select Name in the left hand side and set the right-hand side expression to be

"My Task " + RIGHT("000" + (DT_WSTR,3) @[User::Counter], 3)

这将两个字符串"My Task"连接起来，并将Counter变量转换为字符串，并用零左键填充它，因此它始终是3位数字

This concatenates two strings "My Task" and converts the Counter variable to a string and left pads it with zeroes so it's always a 3 digit number

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