C# ASP.NET字符串Str函数

在您的代码中：

var str = WebConfigurationManager.AppSettings["REPLACE_TEXT"]; // = themessage = %1
str = string.Format("'{0}'", str); // = 'themessage = %1'
return str; // and use it

---

这里缺少一些上下文。这段代码是什么xml文件的一部分？你应该发布实际执行替换的代码。为了澄清要点，我更新了这篇文章。这不是一个字符串函数。您只是在一个XML文件中转义引号，该文件恰好是您的.config文件。尝试使用

'当在双引号内时。换句话说，此代码：是否可以正常工作？您能否指导我如何将您提到的代码放入default.aspx.cs文件中？谢谢。我在上面列出了default.aspx.cs文件。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Web.Configuration;

namespace JamesInputProject
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            string batchFilePath=WebConfigurationManager.AppSettings["BATCH_FILE_LOCATION"];
           string batText= File.ReadAllText(batchFilePath);
           string batReplacedText=batText.Replace(WebConfigurationManager.AppSettings["REPLACE_TEXT"], txtInput.Text);

           //var str = WebConfigurationManager.AppSettings["REPLACE_TEXT"]; // = themessage = %1
           //str = string.Format("'{0}'", str); // = 'themessage = %1'
            //if you dont want to override existing batch file use this
            string outputFilePath = batchFilePath.Remove(batchFilePath.Length - 4) + "_" + DateTime.Now.ToString("ddMMyyyHHmm") + ".bat";
            //if you want to override existing batch file use this
            //string outputFilePath = batchFilePath;
            File.WriteAllText(outputFilePath, batReplacedText);
            lbMessage.Text = string.Format("The Batch File Input is replaced with {0} and written in the file {1}", txtInput.Text, outputFilePath);
        }
    }
}

var str = WebConfigurationManager.AppSettings["REPLACE_TEXT"]; // = themessage = %1
str = string.Format("'{0}'", str); // = 'themessage = %1'
return str; // and use it

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Web.Configuration;

namespace JamesInputProject
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        // create a helper method, just to be more readable
        private string GetReplaceText() {
            var str = WebConfigurationManager.AppSettings["REPLACE_TEXT"]; // = themessage = %1
            str = string.Format("'{0}'", str); // = 'themessage = %1'
            return str; // and use it
        }

        protected void btnSubmit_Click(object sender, EventArgs e)
        {
           string batchFilePath=WebConfigurationManager.AppSettings["BATCH_FILE_LOCATION"];
           string batText= File.ReadAllText(batchFilePath);

           // and call that method:
           string batReplacedText = batText.Replace(GetReplaceText(), txtInput.Text);

           //var str = WebConfigurationManager.AppSettings["REPLACE_TEXT"]; // = themessage = %1
           //str = string.Format("'{0}'", str); // = 'themessage = %1'
            //if you dont want to override existing batch file use this
            string outputFilePath = batchFilePath.Remove(batchFilePath.Length - 4) + "_" + DateTime.Now.ToString("ddMMyyyHHmm") + ".bat";
            //if you want to override existing batch file use this
            //string outputFilePath = batchFilePath;
            File.WriteAllText(outputFilePath, batReplacedText);
            lbMessage.Text = string.Format("The Batch File Input is replaced with {0} and written in the file {1}", txtInput.Text, outputFilePath);
        }
    }
}