在C＃中将Process.StartInfo.Arguments作为字符串传递，该字符串内部包含双引号（“） [英] Passing Process.StartInfo.Arguments in C# as a string that contains double-quotes (") within itself

问题描述

我希望通过我的C＃代码运行mongoexport.exe进程，为此，其参数如下：

I wish to run the mongoexport.exe process through my C# code, for which, let's say, the arguments go something as follows:

-查询 query_syntax

以上所有文本均应存储在C＃代码的字符串变量中，并作为必需的参数传递。

The whole of the above text shall be stored in a string variable in the C# code and passed as the required argument.

现在的问题是C＃在内部使用转义符（）存储此类字符串。相同的转义符甚至保留在命令行中，使我的最终参数看起来如下：

The issue now is that C# internally stores such strings with the escape character (). The same escape character even gets retained in the command-line, making my final argument look something as follows:

-query \ query_syntax\

上述转义字符是我的代码失败的原因，我无法找到任何解决方法。

The above escape character is the reason fro the failure of my code and I fail to find any way about it.

public static string dateConverter(DateTime dt)
    {
        long decimalNumber = (long)(dt.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
        return (Convert.ToString(decimalNumber, 16));
    }
public static void Main(string[] args)
    {
        try
        {
            CultureInfo provider = CultureInfo.InvariantCulture;
            string instr;
            Console.WriteLine("Enter the start date");
            instr = Console.ReadLine();
            DateTime.TryParseExact(instr, "yyyy/MM/dd", provider, DateTimeStyles.None, out startDate);
            Console.WriteLine("Enter the end date");
            instr = Console.ReadLine();
            DateTime.TryParseExact(instr, "yyyy/MM/dd", provider, DateTimeStyles.None, out endDate);
            queryFilter = "{_id:{$gte: ObjectId('" + dateConverter(startDate) + "0000000000000000'), $lte: ObjectId('" + dateConverter(endDate) + "ffffffffffffffff')}}";
            string expstring = " --db yourDatabaseName --collection yourCollectionName --type json --query " + queryFilter + " --out yourFilePath --jsonArray";
            Process export = new Process();
            export.StartInfo.FileName = ExportEXEPath;
            export.StartInfo.Arguments = expstring;
            export.Start();
        }
        catch (Exception ex)
        {
            Console.WriteLine("[ERROR]: " + ex.Message);
        }
    }

推荐答案

无互联网上提到的解决方案中的一部分对我来说效果很好，所以我想出了一个逃生计划，而不是解决问题的办法。我将双引号作为字符存储在变量中，并根据需要将其附加到字符串构建语句中。
然后，我的代码如下所示：

None of the solutions mentioned on the internet worked well for me, so I came up with an escape plan rather than a solution to the problem. I stored the double-quotes as a character in a variable, and appended it to the string building statement as per needs. My code then looked something as follows:

public static string dateConverter(DateTime dt)
{
    long decimalNumber = (long)(dt.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
    return (Convert.ToString(decimalNumber, 16));
}
public static void Main(string[] args)
{
    try
    {
        CultureInfo provider = CultureInfo.InvariantCulture;
        string instr;

        char ch = '"'; //added statement

        Console.WriteLine("Enter the start date");
        instr = Console.ReadLine();
        DateTime.TryParseExact(instr, "yyyy/MM/dd", provider, DateTimeStyles.None, out startDate);
        Console.WriteLine("Enter the end date");
        instr = Console.ReadLine();
        DateTime.TryParseExact(instr, "yyyy/MM/dd", provider, DateTimeStyles.None, out endDate);
        queryFilter = "{_id:{$gte: ObjectId('" + dateConverter(startDate) + "0000000000000000'), $lte: ObjectId('" + dateConverter(endDate) + "ffffffffffffffff')}}";

        //reframed statement
        string expstring = " --db yourDatabaseName --collection yourCollectionName --type json --query " + ch + queryFilter + ch + " --out yourFilePath --jsonArray";

        Process export = new Process();
        export.StartInfo.FileName = ExportEXEPath;
        export.StartInfo.Arguments = expstring;
        export.Start();
    }
    catch (Exception ex)
    {
        Console.WriteLine("[ERROR]: " + ex.Message);
    }
}

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