尝试使用 WinForm 和 C# 将 XML 绑定到 ComboBox

本文关键字：XML 绑定 ComboBox WinForm | 更新日期: 2023-09-27 18:36:16

文件名：位置.xml

<?xml version="1.0" encoding="utf-8" ?>
<locations>
  <location id="1" position="Holiday" />
  <location id="2" position="Time Off" />
  <location id="3" position="Training" />
</locations>

我正在尝试从位置用"文本"填充组合框。目前不需要 id。

我的 C# 代码

        var obj = XDocument.Load("location.xml");            
        comboBox1.DisplayMember = "LocationPosition";
        comboBox1.ValueMember = "LocationID";
        comboBox1.DataSource = obj.Descendants("location").Select(x => new
        {
            LocationPosition = x.Attribute("name").Value,
            LocationID = x.Attribute("id").Value
        }).ToList(); // Crashing here

错误消息显示

System.NullReferenceException was unhandled
  HResult=-2147467261
  Message=Object reference not set to an instance of an object.
  Source=CalendarSharing
  StackTrace:

尝试使用 WinForm 和 C# 将 XML 绑定到 ComboBox

这是因为该 xml 字符串中没有任何name属性。

将name更改为position：

    var obj = XDocument.Load("location.xml");            
    comboBox1.DisplayMember = "LocationPosition";
    comboBox1.ValueMember = "LocationID";
    comboBox1.DataSource = obj.Descendants("location").Select(x => new
    {
        LocationPosition =x.Attribute("position").Value,
        LocationID =  x.Attribute("id").Value
    }).ToList();
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