如何将listview行数据传递到另一个现有形式 [英] how to pass listview row data into another existing form

问题描述

我想拥有2个表单，其中第一个表单具有一个按钮，该按钮将在对话框表单中加载form2. form2将显示一个显示学生数据的列表视图.现在我需要提取所选行的第一个索引.一旦我双击该行，form2将关闭并将数据传递到form1的文本框中.

i want to have 2 forms in which the first form has a button that will load up form2 in a dialog form. form2 will show a listview displaying the data of a student. now i need to extract the 1st index of the selected row. once i double click on the row, form2 would close and pass the data into a textbox in form1.

我使用下面的代码关闭了我的form1并在form2中创建了一个新的form1实例.

i have used the code below which closes my form1 and creates a new instance of form1 in form2.

来自form2:

 private void listView1_DoubleClick(object sender, EventArgs e)
 {
  var cl = listView1.Items[listView1.FocusedItem.Index].SubItems[0].Text;
  Form1 wa= new Form1();
  wa.loadid(cl);
  wa.Show();
  this.Close();
 }

来自form1:

 private void btnReq_Click(object sender, EventArgs e)
 {
        Form2 f2= new Form2();
        f2.Show();
        this.Close();
 }
 public void loadid(String ms)
 {
  String newstring = ms;
  studentid.Text = newstring;
 }

推荐答案

我建议使用对话框，它非常简单:

I suggest using a Dialog, it makes it very easy:

这是Form1.实例化并作为对话框打开f2，然后等待其结果.确定

This is Form1. You instantiate and open f2 as Dialog and then wait for its result.OK

private void Button1_Click(System.Object sender, System.EventArgs e)
{
    var f2 = new Form2();

    if (f2.ShowDialog() == DialogResult.OK) {
        studentId.Text = f2.SelectedStudentId;
    } else {
        studentId.Text = "Select a Student!!!!";
    }
}

在Form2中，您已经在其中创建了列表视图和一个公开显示以下内容的公共属性:

This in Form2, where you have created your listview and a public property to expose:

 public string SelectedStudentId { get; set; }

 private void listView1_DoubleClick(object sender, EventArgs e)
 {
    var cl = listView1.Items[listView1.FocusedItem.Index].SubItems[0].Text;
    SelectedStudentId = cl;
    DialogResult = DialogResult.OK; //will close this dialog (form2)
 }

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