Question

编辑：我使用绑定到下面BindingSource的DataGridView，但是当我在DataGridView中编辑一个单元格时，检查BindingSource.CurrentItemChanged会显示该单元格的原始值。我是否正确使用BindingSource？我认为重点是它会反映绑定控件所做的更改。我的代码列在下面，非常感谢任何帮助！

using System;
using System.Windows.Forms;
using System.Drawing;

public class GuiProductMaintenanceForm : Form {
    private const int FORM_HEIGHT = 600;
    private const int FORM_WIDTH = 800;
    private BindingNavigator menu;
    private DataGridView grid;
    private BindingSource source;

    public GuiProductMaintenanceForm() {
        instComponents();
        posComponents();
        setProperties();
        addComponents();
    }

    private void instComponents() {
        this.source = new BindingSource(
            DataHandler.getProductData(), "Products");
        this.menu = new BindingNavigator(source);
        this.grid = new DataGridView();

    }

    private void posComponents() {
        int xPos = 0;
        int yPos = 0;

        this.menu.Location = new Point(xPos, yPos);
        this.grid.Location = new Point(xPos, yPos + this.menu.Height);
    }

   private void setProperties() {
        //controls
        this.menu.Size = new Size(FORM_WIDTH, 32);

        this.grid.Size = new Size(FORM_WIDTH, FORM_HEIGHT - this.menu.Height);
        this.grid.BorderStyle = BorderStyle.FixedSingle;
        this.grid.DataSource = source;
        this.grid.AllowUserToAddRows = false;
        this.grid.ReadOnly = false;
        this.grid.DefaultCellStyle.Font = new Font(
            FontFamily.GenericSansSerif, 12);

        //this form
        this.Text = "Product Maintenance";
        this.ClientSize = new Size(FORM_WIDTH, FORM_HEIGHT);
        this.FormBorderStyle = FormBorderStyle.FixedSingle;
    }

    private void addComponents() {
        this.Controls.Add(this.menu);
        this.Controls.Add(this.grid);
    }

}

DataHandler.GetProductData（）只返回带有数据的DataSet，但我只是为了安全而包含代码。

public static DataSet getProductData() {
        MySqlConnection c = makeConnection(getDefaultConnStr());
        c.Open();
        string selectStatement = "SELECT * FROM Products";
        MySqlDataAdapter da = new MySqlDataAdapter(selectStatement, c); 
        DataSet ds = new DataSet();
        da.Fill(ds, "Products");
        return ds; 

}

Answer 1

我知道这篇文章已经过时了，但是对于那些偶然发现这个帖子的人来说。我相信您的DataEdit在Gridview中，您正在编辑该单元格，除非您在DataGridView上调用endit方法，否则不会将其传播到binidngsource。

看这里EndEdit on BindingSource updates DataTable, but rowstate still unchanged

和How to properly commit bindingSource changes to source DB?

您也可以查看一下 How to: Reflect Data Source Updates in a Windows Forms Control with the BindingSource

c #datagridview更改未反映在底层绑定源中

1 个答案: