How to Effectively Transfer Data Between C# Forms?

Data transmission between the windows: complete guide

When building a dynamic interactive application, the value of the windows is transmitted to it. This guide will introduce an effective method, and use C#to pass data between two windows (Form1 and Form2).

Step 1: Form1 -Open Form2

In the Form1 button click the event, use the following syntax to initialize the new instance of Form2:

ShowDialog () method display Form2 with a modal dialog box. Form1 will not be accessible before Form2 is closed.

using(Form2 form2 = new Form2()) 
{
    // 以模态对话框方式打开Form2
    form2.ShowDialog();
}

Step 2: Form1 -Get the value of the submitted

FORM2 is closed, check the results of the showdialog () call. If the dialogresult is OK, the value of the submitted from Form2:

Step 3: FORM2 -Provide public attributes for value exchange

if(form2.ShowDialog() == DialogResult.OK) 
{
    someControlOnForm1.Text = form2.TheValue;
}

In Form2, create a public attribute as the source of the submit value:

This attribute retrieves the text in the Form2 text box, allowing Form1 to access it.

Example implementation

public string TheValue 
{
    get { return someTextBoxOnForm2.Text; }
}

Consider the following simplified example:

In Form1, the button click the event to open Form2 and give the submitted value to the label:

In Ferm2, the text of TheVALUE attribute returns the text in the text box named Textbox1:

private void Button1_Click(object sender, EventArgs e) 
{
    using(Form2 form2 = new Form2()) 
    {
        if(form2.ShowDialog() == DialogResult.OK) 
        {
            label1.Text = form2.TheValue;
        }
    }
}

By following these steps, you can easily pass data between the windows to achieve efficient communication and interaction in the application.

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