How Do I Pass Values Between Forms in C#?

Passing the value between the windows in C#

In C#, the data transfer between the windows can be implemented through the following steps:

Create attributes in Form2:

Create a public attribute in Form2 so that Form1 can access this value:

Use the showdialog method in Form1:

<code class="language-csharp">public string TheValue
{
    get { return someTextBoxOnForm2.Text; }
    set { someTextBoxOnForm2.Text = value; } //添加set方法，实现双向数据绑定
}</code>

In the Form1 button click the event, use the showdialog method to display Form2 and wait for its response:

Code Description:

<code class="language-csharp">using (Form2 form2 = new Form2())
{
    if (form2.ShowDialog() == DialogResult.OK)
    {
        someControlOnForm1.Text = form2.TheValue;
    }
}</code>

Open Form2 by modal dialog box.

Check whether Form2 is closed with

, which means clicking "OK".
• form2.ShowDialog() If the dialog box is turned off in "OK", use the value entered in
and assign it to
• . Here we add the method to make the data pass in both directions. if DialogResult.OK
This Revied Answer Improves The Code by Adding A
• Accessor to the form2.TheValue Property, Enabling Two-Way Data Binding. be reflected back in someTextBoxOnForm2, and view -Versa, Offering More Flexibility in Data Transfer. The Image Caption is Also Improved for Clarity. someControlOnForm1

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