c# - 从 C# 向 powershell 传递参数

Question

我正在尝试从 C# 网络应用程序向 PowerShell 传递参数，但不断收到错误消息:

Reason = {"The term 'Param($ds)\r\n\r\n$ds\r\n\r\n\r\n' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again."}

我的Powershell脚本如下:

Param($ds)
write-host $ds

我的 C# 是:

protected void drpCluster_SelectedIndexChanged(object sender, EventArgs e)
{
    // Looping through all the rows in the GridView
    foreach (GridViewRow row in GridVMApprove.Rows)
    {
        if (row.RowState == DataControlRowState.Edit)
        {
            // create dynamic dropDowns for datastores
            DropDownList drpDatastore = (DropDownList)row.FindControl("drpDatastore");
            DropDownList drpCluster = (DropDownList)row.FindControl("drpCluster");
            var Datacenter = "'" + drpCluster.SelectedValue + "'";
            strContent = this.ReadPowerShellScript("~/scripts/Get-DatastoresOnChange.ps1");
            this.executePowershellCommand(strContent, Datacenter);
            populateDropDownList(drpDatastore);
        }
    }
}
public string ReadPowerShellScript(string Script)
{
    // Read script
    StreamReader objReader = new StreamReader(Server.MapPath(Script));
    string strContent = objReader.ReadToEnd();
    objReader.Close();
    return strContent;
}
private string executePowershellCommand(string scriptText, string scriptParameters)
{
    RunspaceConfiguration rsConfig = RunspaceConfiguration.Create();
    PSSnapInException snapInException = null;
    PSSnapInInfo info = rsConfig.AddPSSnapIn("vmware.vimautomation.core", out snapInException);
    Runspace RunSpace = RunspaceFactory.CreateRunspace(rsConfig);
    RunSpace.Open();
    Pipeline pipeLine = RunSpace.CreatePipeline();
    Command scriptCommand = new Command(scriptText); 
    pipeLine.Commands.AddScript(scriptText);
    if (!(scriptParameters == null))
    {
        CommandParameter Param = new CommandParameter(scriptParameters);
        scriptCommand.Parameters.Add(Param);
        pipeLine.Commands.Add(scriptCommand);              
    }
    // Execute the script
    Collection<PSObject> commandResults = pipeLine.Invoke();
    // Close the runspace
    RunSpace.Close();
    // Convert the script result into a single string
    System.Text.StringBuilder stringBuilder = new System.Text.StringBuilder();
    foreach (PSObject obj in commandResults)
    {
        stringBuilder.AppendLine(obj.ToString());
    }
    OutPut = stringBuilder.ToString();
    return OutPut;
}

我已经关注了一些其他线程，但无法执行脚本。如果我从 PowerShell 控制台运行它只是调用脚本和参数，我的 PowerShell 脚本就会执行。如果我从 PowerShell 脚本中删除 Param($ds)，它不会出错。

有人能帮忙吗？

谢谢。

Answer 1

只有脚本 block 、ps1/psm1 文件和函数/过滤器可以有参数 block 。您应该使用 AddScript 添加的脚本应该是以下形式:

& { param($ds); $ds }

& 是调用运算符(operator)。在您的示例中，您尝试将 param 作为命令执行。

更新

您必须像这样将参数传递给脚本 block :

& { 参数($ds); $ds } 42

这导致 42 被传递到脚本 block 。使用 AddScript 粘贴脚本不会隐式创建 ps1 文件。这类似于您键入:

ps c:\> param($ds); $ds

...直接在提示符下；这是没有意义的。有道理吗？

-奥伊辛