如何從文本文件中獲取值並將其設置在文本框中？

Question

這裏是問題：我有兩個班。表單1創建一個.txt文件並在其中設置兩個值（字符串）。現在，我想通過按下按鈕（bDirekt）來獲得這兩個字符串，並將每個字符串設置爲Form 2中的Textbox。

Form 1（應該是正確的，據我所知，但請告訴我，錯了）：

public void Txfw() 
    { 
     string txBetrag = gBetrag.Text; 
     string txMonate = gMonate.Text; 

     string[] vars = new string[] { txBetrag, txMonate }; 
     using (StreamWriter sw = new StreamWriter(@"C:\Users\p2\Desktop\variablen.txt")) 
     { 

      foreach (string s in vars) 
      { 
       sw.WriteLine(s); 
      } 
     } 
    } 

表2（有不知道如何繼續下去）：

private void bDirekt_Click(object sender, RoutedEventArgs e) 
    { 
     using (StreamReader sr = new StreamReader("variables.txt")) ; 

     string line = ""; 
     while ((line = sr.ReadLine()) != null) 
     { 
      monate2.Text = 
     } 

    } 

我真的很感謝你的幫助。

Answer 1

試試這個

StringBuilder sb = new StringBuilder(); 
    using (StreamReader sr = new StreamReader(@"C:\Users\p2\Desktop\variablen.txt")) 
    { 
        string line; 

        // Read and display lines from the file until 
        // the end of the file is reached. 
        while ((line = sr.ReadLine()) != null) 
        { 
         sb.Append((line); 
        } 
    } 
    monate2.Text = sb.Tostring(); 

UPDATE：要單獨一行與文本的其餘部分，你可以試試這個。總是有更好的方法來實現這一點。

StringBuilder sb = new StringBuilder(); 
    string headerLine = string.Empty; 
    int currentLine = 0; 
     using (StreamReader sr = new StreamReader(@"C:\Users\p2\Desktop\variablen.txt")) 
     { 
         string line; 

         // Read and display lines from the file until 
         // the end of the file is reached. 
         while ((line = sr.ReadLine()) != null) 
         { 
          currentLine++; //increment to keep track of current line number. 
          if(currentLine == 1) 
          { 
          headerLine = line; 
          continue; //skips rest of the processing and goes to next line in while loop 
          } 
          sb.Append((line); 

         } 
     } 
     header.Text = headerLine; 
     monate2.Text = sb.ToString();