如何使用 Datagridview 绑定源 C# 更新 SQL Server 数据库 [英] How to update SQL Server database using Datagridview binding source C#

问题描述

我正在用 C# 编写一个 Winforms 应用程序，它使用户能够使用 datagridview 编辑和更新数据库.

I'm writing a Winforms app in C# that enables the user to edit and update database using the datagridview.

问题是，我无法让它工作.我唯一设法实现的是更新 datagridview 显示的内容，但是当我进入数据库表时，数据没有变化.我搜索了很多讨论这个问题的网站，但还没有对我有用.

The problem is, I can't make it to work. The only thing that I managed to achieve is updating what the datagridview is showing, but when I go into the database table, there is no change in the data. I have search a lot of sites discussing about that problem but nothing yet worked for me.

到目前为止我尝试过的事情:

Things I have tried so far:

• 将数据库绑定到datagridview
• 将 Copy to Output Directory 属性更改为 Copy if newer
• 使用 dataAdapter.Update((DataTable)b​​indingSource1.DataSource) 执行或不执行任何更新查询.
• 在没有dataAdapter.update(...)的情况下执行更新查询.

• binding the database to the datagridview
• changing the Copy to Output Directory property to Copy if newer
• using the dataAdapter.Update((DataTable)bindingSource1.DataSource) with or without any update query execute.
• execute update query without dataAdapter.update(...).

这是我的代码:

public Form1()
{
    InitializeComponent();
    GetData("SELECT * FROM Table1");
}

void GetData(string selectCommand)
{
    SqlConnection conn = new SqlConnection(Properties.Settings.Default.NewDBTESTConnectionString);

    dataAdapter = new SqlDataAdapter(selectCommand, conn);
    commandBuilder = new SqlCommandBuilder(dataAdapter);

    table = new DataTable();
    dataAdapter.Fill(table);

    bindingSource1.DataSource = table;
    dataGridView1.DataSource = bindingSource1;
}

private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
        dataAdapter.Update((DataTable)bindingSource1.DataSource);    
}

推荐答案

如果不调用 bindingSource1.EndEdit，您的底层 DataTable 不会看到任何更改，因此 Update 命令没有任何要更新的内容.

Without calling bindingSource1.EndEdit your underlying DataTable doesn't see any change and thus the Update command has nothing to update.

private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    bindingSource1.EndEdit();
    DataTable dt = (DataTable)bindingSource1.DataSource;

    // Just for test.... Try this with or without the EndEdit....
    DataTable changedTable = dt.GetChanges();
    Console.WriteLine(changedTable.Rows.Count);

    int rowsUpdated = da.Update(dt);    
    Console.WriteLine(rowsUpdated);
}

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