将特定元素从 XML 加载到 textbox/combobox/NumericUpDown

Question

我目前有一个组合框 cbxID，它显示所有 StudentID，并希望在按下按钮加载的同时将不同的元素发送到不同的文本框/组合框/NumericUpDown。

加载按钮应采用当前选定的学生 ID，然后将信息发送到右侧框中。

  <Student>
    <StudentID>207</StudentID> //supposed to go into txtStudentID
    <FirstName>Bob</FirstName> // -->txtFirstName
    <LastName>Smith</LastName> // -->txtLastName
    <SchoolClass>10</SchoolClass> // -->txtSchoolClass
    <Age>17</Age> //-->nudAge (numericupdown)
    <Height>186</Height //-->nudHeight
    <Gender>male</Gender> //-->combobox
  </Student>

我正在使用此代码将 ID 显示到组合框中

       private void Form1_Load(object sender, EventArgs e)
        {
            DataSet dataSet = new DataSet();
            dataSet.ReadXml(FilePath);
            this.cbxStudentIDs.DataSource = dataSet.Tables[0];
            this.cbxStudentIDs.DisplayMember = "ID";
        }

Answer 1

根据你的描述，你想加载按钮来接收当前的

选择的学生证，当你按下按钮加载时，将不同的元素发送到不同的消息框。

你可以试试下面的代码来解决这个问题。

public partial class Form1 : Form
    {
        string FilePath = "D:\\student.xml";        

        public Form1()
        {       
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            DataSet dataSet = new DataSet();
            dataSet.ReadXml(FilePath);
            DataRow row = dataSet.Tables[0].AsEnumerable().Where(x => x.Field<string>("StudentID") == cbxStudentIDs.Text).FirstOrDefault();
            txtStudentID.Text = row["StudentID"].ToString();
            txtFirstName.Text = row["FirstName"].ToString();
            txtLastName.Text = row["LastName"].ToString();
            txtSchoolClass.Text = row["SchoolClass"].ToString();
            nudAge.Value = Convert.ToDecimal(row["Age"]);
            nudHeight.Value = Convert.ToDecimal(row["Height"]);
            comboBox1.Text= row["Gender"].ToString();

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DataSet dataSet = new DataSet();
            dataSet.ReadXml(FilePath);
            cbxStudentIDs.DataSource = dataSet.Tables[0];
            cbxStudentIDs.DisplayMember = "StudentID";

        }
    }

我使用了以下 xml 文件：

<?xml version="1.0" encoding="utf-8"?>
<ArrayOfDaten xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Student>
    <StudentID>207</StudentID> 
    <FirstName>Bob</FirstName> 
    <LastName>Smith</LastName> 
    <SchoolClass>10</SchoolClass> 
    <Age>17</Age> 
    <Height>186</Height>
    <Gender>male</Gender> 
  </Student>
 <Student>
    <StudentID>208</StudentID> 
    <FirstName>fei</FirstName> 
    <LastName>meng</LastName> 
    <SchoolClass>12</SchoolClass> 
    <Age>19</Age> 
    <Height>178</Height>
    <Gender>male</Gender> 
  </Student>
 <Student>
    <StudentID>209</StudentID> 
    <FirstName>qiu</FirstName> 
    <LastName>Song</LastName> 
    <SchoolClass>12</SchoolClass> 
    <Age>18</Age> 
    <Height>165</Height>
    <Gender>female</Gender> 
  </Student>
<Student>
    <StudentID>210</StudentID> 
    <FirstName>yiyi</FirstName> 
    <LastName>Yao</LastName> 
    <SchoolClass>11</SchoolClass> 
    <Age>18</Age> 
    <Height>168</Height>
    <Gender>female</Gender> 
  </Student>
</ArrayOfDaten>

这是我的测试结果：