合并两个结构完全相同的DataTable

两个结构一模一样的DataTable如何合并？

例子：使用Winform进行演示，表2的数据为固定的，表1的数据可以动态添加，通过合并按钮合并表1和表2的数据到表3





1.规定公共的DataTable结构

/// <summary>
/// 构造空的DataTable
/// </summary>
/// <returns></returns>
private DataTable GetEmptyDataTable()
{
DataTable dt = new DataTable();
dt.Columns.Add("Id");
dt.Columns.Add("Name");
return dt;
}

2.窗体加载事件中构造表2的数据

private void Form1_Load(object sender, EventArgs e)
{
//构造表2的数据
DataTable dt2 = this.GetEmptyDataTable();
DataRow dr = dt2.NewRow();
dr["Id"] = Guid.NewGuid();
dr["Name"] = "表二的数据";
dt2.Rows.Add(dr);
this.dgv2.DataSource = dt2;
}

3.动态添加表1的数据

/// <summary>
/// 新增表1数据
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnAddTable1_Click(object sender, EventArgs e)
{
this.dgv3.DataSource = null;
DataTable dtDataSouce = this.dgv1.DataSource as DataTable;
if (dtDataSouce == null)
{
dtDataSouce = this.GetEmptyDataTable();
}
DataRow dr = dtDataSouce.NewRow();
dr["Id"] = Guid.NewGuid();
dr["Name"] = "第" + dtDataSouce.Rows.Count.ToString() + "条数据";
dtDataSouce.Rows.Add(dr);
this.dgv1.DataSource = dtDataSouce;
}

4.开始合并

/// <summary>
/// 合并两2个DataTable
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnStartMerge_Click(object sender, EventArgs e)
{
//得到表1的数据
DataTable dt1 = this.dgv1.DataSource as DataTable;
//得到表二的数据
DataTable dt2 = this.dgv2.DataSource as DataTable;
//开始合并（思路：构造空的表dt结构和表1、表2相同 将表1表2的数据添加到dt中）

//1. 任意选择一个表进行复制
DataTable dt = dt1.Clone();
//2.循坏遍历表1
foreach (DataRow dr in dt1.Rows)
{
dt.Rows.Add(dr.ItemArray);
}
//3.循环遍历表2
foreach (DataRow dr in dt2.Rows)
{
dt.Rows.Add(dr.ItemArray);
}
//此时dt就是表1和表2的合并数据
this.dgv3.DataSource = dt;
}

5.演示



源代码下载