关闭子窗体时如何刷新datagridview? [英] How to refresh datagridview when closing child form?

问题描述

我的主表单上有一个 dgv，有一个按钮可以打开另一个表单以将一些数据插入到绑定到 dgv 的数据源中.我想当子窗体关闭 dgv 自动刷新时.我试图在子窗体关闭事件中添加它，但它没有刷新:

I've a dgv on my main form, there is a button that opens up another form to insert some data into the datasource bounded to the dgv. I want when child form closes the dgv auto refresh. I tried to add this in child form closing event, but it doesn't refresh:

private void frmNew_FormClosing(object sender, FormClosingEventArgs e)
        {
            frmMain frmm = new frmMain();

            frmm.itemCategoryBindingSource.EndEdit();
            frmm.itemsTableAdapter.Fill(myDatabaseDataSet.Items);
            frmm.dataGridView1.Refresh();
        }

但是，当我在父窗体的按钮中添加此代码时，它实际上起到了作用:

However, when I add this code in a button on the parent form, it actually does the trick:

        this.itemCategoryBindingSource.EndEdit();
        this.itemsTableAdapter.Fill(myDatabaseDataSet.Items);
        this.dataGridView1.Refresh();

推荐答案

有很多方法可以做到这一点，但以下是最简单的，它会做你想做的事情并让你开始.

There are many ways to do this, but the following is the simpliest and it will do what you want and get you started.

• 在主窗体上创建一个公共方法.
• 修改了第二种形式的构造函数以采用主形式.
• 创建传递主表单对象的第二个表单的实例.
• 关闭第二个表单时，调用主表单对象的公共方法.

public partial class Form1 : Form {
    public Form1() {
        //'add a label and a buttom to form
        InitializeComponent();
    }
    private void button1_Click(object sender, EventArgs e) {
        Form2 oForm = new Form2(this);
        oForm.Show();
    }
    public void PerformRefresh() {
        this.label1.Text = DateTime.Now.ToLongTimeString();
    }
}

表格 2

public class Form2 : Form {
    Form1 _owner;
    public Form2(Form1 owner) {
        _owner = owner;
        this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form2_FormClosing);
    }
    private void Form2_FormClosing(object sender, FormClosingEventArgs e) {
        _owner.PerformRefresh();
    }
}

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