如何从一些控件创建文本行的内容并将其写入文本文件？

private void button1_Click(object sender, EventArgs e) 
{ 
    string accountsSettingsFile = Path.GetDirectoryName(Application.LocalUserAppDataPath) 
      + "\\accounts" + "\\accounts.txt"; 
    if (!File.Exists(accountsSettingsFile)) 
     File.Create(accountsSettingsFile);    
    System.IO.File.WriteAllText(accountsSettingsFile,); 
}

我想在将内容写入按钮单击事件中的文本文件之前生成一个字符串。也许StringBuilder并将其格式化为包含某些控件的所有数据。如何从一些控件创建文本行的内容并将其写入文本文件？

我有一个textBox1,textBox2,textBox3 a checkBox。我想获取所有这些控件数据并将其写入文本文件中。

例如，如果在textBox1我有"hello"和textBox2"world"和textBox3"hi"和checkBox是false，然后将文本文件的内容应该是这样的：

hello 
world 
hi 
false

来源

2016-03-02 Shmuel Naukarkar

我会去像这样的东西，特别是如果您的控件列表可能会延后更长时间：

private void button1_Click(object sender, EventArgs e) 
    { 
     Form1.WriteToFile(textBox1, textBox2, textBox3, checkBox); 
    } 

    private static void WriteToFile(params Control[] controls) 
    { 
     string accountsSettingsFile = Path.GetDirectoryName(Application.LocalUserAppDataPath) 
     + "\\accounts" + "\\accounts.txt"; 

     List<string> lines = new List<string>(controls.Length); 

     foreach (var control in controls) 
     { 
      string value = Form1.GetValueFromControl(control); 

      //this will skip null entries, not sure you really 
      //want to do that, otherwise when you read this file back in 
      //you will have no idea which values represent which fields 
      if (value != null) 
       lines.Add(value); 
     } 

     //This will overwrite the file. 
     //If you want to append use File.AppendAllLines 
     File.WriteAllLines(accountsSettingsFile, lines); 
    } 

    private static string GetValueFromControl(Control control) 
    { 
     if (control is TextBox) 
     { 
      return ((TextBox)control).Text; 
     } 

     if (control is CheckBox) 
     { 
      return ((CheckBox)control).Checked.ToString(); 
     } 

     return null; 
    }

虽然，因为您正在使用此设置，所以将原始值写入文本文件是一种非常脆弱的方法。我可以推荐使用序列化？虽然这需要你在你的项目中引用Newtonsoft.Json（通过的NuGet）：

private void Button_Write_Click(object sender, EventArgs e) 
    { 
     AccountSettings settings = new AccountSettings(); 
     settings.Setting1 = this.textBox1.Text; 
     settings.Setting2 = this.textBox2.Text; 
     settings.Setting3 = this.textBox3.Text; 
     settings.CheckboxValue = this.checkBox.Checked; 
     WriteJson(settings, SettingsFile); 
    } 

    private void Button_Read_Click(object sender, EventArgs e) 
    { 
     AccountSettings settings = ReadJson<AccountSettings>(SettingsFile); 
     this.textBox1.Text = settings.Setting1; 
     this.textBox2.Text = settings.Setting2; 
     this.textBox3.Text = settings.Setting3; 
     this.checkBox.Checked = settings.CheckboxValue; 
    } 

    private static string SettingsFile 
    { 
     get 
     { 
      return Path.GetDirectoryName(Application.LocalUserAppDataPath) 
      + "\\accounts" + "\\accounts.txt"; 
     } 
    } 

    private static void WriteJson(Object obj, string path) 
    { 
     var ser = new JsonSerializer(); 
     using (var file = File.CreateText(path)) 
     using (var writer = new JsonTextWriter(file)) 
     { 
      ser.Serialize(writer, obj); 
     } 
    } 

    private static T ReadJson<T>(string path) 
     where T: new() 
    { 
     if (!File.Exists(path)) 
      return new T(); 

     var ser = new JsonSerializer(); 
     using (var file = File.OpenText(path)) 
     using (var reader = new JsonTextReader(file)) 
     { 
      return ser.Deserialize<T>(reader); 
     } 
    } 

    private class AccountSettings 
    { 
     public string Setting1 { get; set; } 
     public string Setting2 { get; set; } 
     public string Setting3 { get; set; } 
     public bool CheckboxValue { get; set; } 
    } 

}

这给你一个强类型可以写入和读取一个非常具体和可重复的方式AccountSettings对象。

来源

2016-03-02 16:47:18

var checked = checkBox.Checked ? "true" : "false"; 
var textToBeSaved = string.Format("{0}\n{1}\n{2}\n{3}", textBox1.Text, textBox2.Text, textBox3.Text, checked)

来源

2016-03-02 16:35:54 pasnik

private void button1_Click(object sender, EventArgs e) 
{ 
    string accountsSettingsFile = Path.GetDirectoryName(Application.LocalUserAppDataPath) 
      + "\\accounts" + "\\accounts.txt"; 
    if (!File.Exists(accountsSettingsFile)) 
     File.Create(accountsSettingsFile);  

    //New Code 
    StringBuilder accountText = new StringBuilder(); 
    accountText.AppendLine(textbox1.Text); 
    accountText.AppendLine(textbox2.Text);  
    accountText.AppendLine(textbox3.Text); 
    accountText.AppendLine(checkbox.Checked.ToString().ToLowerInvariant()); 
    //Above line assumes you want a trailing newline 
    System.IO.File.WriteAllText(accountsSettingsFile, accountText.toString()); 
}

当然，这是很无聊的，没有特别的可扩展性，如果你想生成多个帐户动态页面立刻被输入，你可以使用Page.FindControl遍历你的文本框和所有附加他们的文件。

来源

2016-03-02 16:48:02 IllusiveBrian

如何从一些控件创建文本行的内容并将其写入文本文件？

回答

相关问题