如何将comboBox数据源从form1链接到form2 comboBox？ [英] How to link comboBox data source from form1 to form2 comboBox?

问题描述

如何显示来自form1 comboBox的form2中comboBox中的成员？

how can I display members in comboBox in form2 from form1 comboBox?

Form form1 = Application.OpenForms["Form1"];

private void BookSetupForm_Load(object sender, EventArgs e)
{
    comboBox1.DataSource = form1.comboBox1;
}

问题有所不同，因为我想传输comboBox值而不是文本框值和用法

The question is different as I want to transfer comboBox values not textboxes values and uses a different approach.

推荐答案

因为表格1上的 ComboBox 是不是 public ，您需要一个额外的字段或属性作为传输对象：

Since the ComboBox on your Form 1 is not public you would need an extra field or property as transfer object:

public partial class Form1 : Form
{

    public ComboBox comboTransfer;

    public Form1()
    {
        InitializeComponent();

        // example combobox
        this.comboBox1.Items.AddRange(new string[] { "1", "2", "3" });
        // reroute the content
        this.comboTransfer = comboBox1;
    }
}

在表格2中，您可以访问该转移对象

In Form 2 you could access then this transfer object

public partial class Form2 : Form
{
    Form1 Form_1;
    public Form2()
    {
        InitializeComponent();

        Form_1 = Application.OpenForms["Form1"] as Form1;
    }

    private void BookSetupForm_Load(object sender, EventArgs e)
    {
        // access here your transfer object
        this.comboBox1.DataSource = Form_1.comboTransfer.Items;
    }
}

这只是这样做的一种方法（首先在我脑海中浮现）

this is just one way of doing it (first that came to my mind)

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