DataTable.Merge 方法 (DataTable)

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace chxboxs

{

public partial class Form1 : Form

{

private DataTable table1;

private void Form1_Load(object sender, EventArgs e)

{

table1 = new DataTable("Items");

// Add columns

DataColumn column1 = new DataColumn("id", typeof(System.Int32));

DataColumn column2 = new DataColumn("item", typeof(System.Int32));

table1.Columns.Add(column1);

table1.Columns.Add(column2);

// Set the primary key column.

table1.PrimaryKey = new DataColumn[] { column1 };

// Add some rows.

DataRow row;

for (int i = 0; i <=2; i++)

{

row = table1.NewRow();

row["id"] = i;

row["item"] = i;

table1.Rows.Add(row);

}

// Accept changes.

table1.AcceptChanges();

//PrintValues(table1, "Original values");

this.dataGridView2.DataSource = table1;

// Create a second DataTable identical to the first.

}

private void button2_Click(object sender, EventArgs e)

{

DataTable table2 = table1.Clone();

DataRow row;

row = table2.NewRow();

row["id"] = 14;

row["item"] = 774;

table2.Rows.Add(row);

row = table2.NewRow();

row["id"] = 12;

row["item"] = 555;

table2.Rows.Add(row);

table1.Merge(table2);

this.dataGridView2.DataSource = table1;

}

private Form2 f2;

public Form1()

{

InitializeComponent();

}

private void Form1_KeyDown(object sender, KeyEventArgs e)

{

this.label1.Text = e.KeyCode.ToString();

}

private void button1_Click(object sender, EventArgs e)

{

if (f2 == null||f2.IsDisposed)

{

f2 = new Form2();

f2.Show();

}

else

{

f2.Activate();

}

}

}

}

将指定的 DataTable 与当前的 DataTable 合并。