我有两个类(表单),我希望在单击时将 class2
中的一个项目添加到 class1
中的 listBox
接受"按钮.
I have two classes(forms), and I would like an item from class2
to be added to listBox
in class1
when I click "Accept" button.
我尝试了以下代码,但列表框没有任何变化:
I tried with the following code, but nothing changes in the listBox:
private void button1_Click(object sender, EventArgs e)
{
CarRental i = new CarRental();
string id = idRental.Text.ToString();
i.listBox1.Items.Add(id);
i.listBox1.Update();
this.Close();
}
我在哪里犯错了?
在 Form2
上声明 RentalId
属性.在 CarRental
表单(您的第一个表单)中执行以下操作:
Declare RentalId
property on Form2
. And at CarRental
form (your first form) do following:
using(Form2 form2 = new Form2())
{
if (fomr2.ShowDialog() != DialogResult.OK)
return;
listBox.Items.Add(form2.RentalId);
}
以这种方式实现 Fomr2.RentalId
属性:
Implement Fomr2.RentalId
property this way:
public string RentalId
{
get { return idRental.Text; } // you don't need ToString() call
}
然后选择接受"按钮并将其 DialogResult
属性设置为 OK
.因此,单击该按钮将关闭您的对话框并返回 DialogResult.OK
.
Then select your "Accept" button and set its DialogResult
property to OK
. Thus clicking on that button will close your dialog form and return DialogResult.OK
.
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