SSIS For循环停止工作 [英] SSIS For Loop Stopped working
问题描述
我的sis软件包中有一个for循环容器,其中包含一个脚本和一个sql任务.
I have a for loop container within my ssis package which contains a script and a sql task.
我有3个变量.
source.string = this is folder location
file.string = i have used wildcard = *.csv
exist.int = defaulted to 0
我将innitexpression值设置为@ Exists = 1 并将评估值设置为@ Exists = 1
I have the innitexpression value set to @Exists=1 and the evalexpression value set to @Exists=1
在脚本中,我将其设置为查看源变量,如果存在file.string变量,则将exist变量设置为1
in the script I have set it to look at source variable and if file.string variable exists then set exist variable to 1
问题是它只是循环而已,如果那里没有文件,就应该循环.在将变量更改为通配符* .csv
problem is it just loops it should only loop if no file there. cant see how I've done this wrong it was working before I changed the variable to be a wildcard *.csv
我已经使用另一个包含文件名而不是通配符的变量对其进行了测试,它可以正常工作,问题是在查找文件名后跟扩展名的通配符时.为什么是这样?我不能通过通配符变量吗?
I have tested it using another variable which contains a filename rather than a wildcard and it works correctly the issue is when looking for a wildcard for the filename followed by the extension. why is this? can I not pass through a wildcard variable?
我的脚本任务是
public void Main()
{
// TODO: Add your code here
string Filepath = Dts.Variables["User::Source"].Value.ToString()
+ Dts.Variables["User::file"].Value.ToString();
if (
File.Exists(Filepath))
{
Dts.Variables["User::Exists"].Value = 1;
}
/// MessageBox.Show (Filepath);
/// MessageBox.Show(Dts.Variables["Exists"].Value.ToString());
Dts.TaskResult = (int)ScriptResults.Success;
}
#region ScriptResults declaration
/// <summary>
/// This enum provides a convenient shorthand within the scope of this class for setting the
/// result of the script.
///
/// This code was generated automatically.
/// </summary>
enum ScriptResults
{
Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
};
#endregion
}
}
推荐答案
基于上面的评论,我提出了两种不同的解决方案.现在为您提供的解决方案是否. 2
Based on comments above i made 2 different solutions. The solution for you right now would be no. 2
-
此文件可以根据路径中的多个文件搜索特定文件.它需要一些调整,但是如果您想检查通配符是否存在特定文件,可以使用
This one can search for a specific file based on multiple files in your path. It need some tweaking but can be used if you wanna check if a specific file exists with wildcard
如果找到任何通配符文件,则此评估为true.
This one evaluates to true if any wildcard file is found.
C#代码1
Using System.IO:
string Filepath = Dts.Variables["User::Source"].Value.ToString();
string WildCard = Dts.Variables["User::file"].Value.ToString(); // In Text form @"*.txt";
string fullpath = Filepath + WildCard;
//With for loop
string txtFile = null;
// Gets all files with wildcard
string[] allfiles = Directory.GetFiles(Filepath, WildCard);
//Loop through all files and set the filename in txtFile. Do whatever you want here
foreach(string fileName in allfiles)
{
//Check if a file contains something, it could be a prefixed name you only want
if(fileName.Contains("txt"))
{
txtFile = fileName;
if(File.Exists(txtFile))
{
Dts.Variables["User::Exists"].Value = 1;
}
}
}
C#代码2
Using System.IO;
Using System.Linq;
string Filepath = Dts.Variables["User::Source"].Value.ToString();
string WildCard = Dts.Variables["User::file"].Value.ToString(); //In text form "*.txt";
string fullpath = Filepath + WildCard;
//With bool
bool exists = Directory.EnumerateFiles(Filepath, WildCard).Any();
if(exists == true)
{
Dts.Variables["User::Exists"].Value = 1;
}
MessageBox.Show (Filepath);
MessageBox.Show(Dts.Variables["Exists"].Value.ToString());
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