DataTable进行汇总
例如：
批号 数量
0001 100
0002 200
0001 300
0002 400
0003 500
在DataTable中显示是这样的结果，现在在DataTable中根据批号汇总数量，怎么写？是C#程序编写啊！
我知道DataTable中两个方法Select()和Compute()，请各位指教一下。谢谢。

[解决办法]
sumObject = DataTable.Compute("Sum(数量)", "批号='001'");
[解决办法]
dataTable1是你的数据，那么就执行下面的

System.Data.DataView dv = dataTable1.DefaultView;
System.Data.DataTable dataTable2 = dv.ToTable(true, "批号");
for (int i = 0; i < dataTable2.Rows.Count; i++)
{
String type = dataTable2.Rows[i][0].ToString();
MessageBox.Show(type + "=" + dataTable1.Compute("Sum(数量)", "批号='" + type + "'").ToString());
}

就可以了

完整的例子

C# code

System.Data.DataTable dataTable1 = new System.Data.DataTable("BlogUser");System.Data.DataRow dr;dataTable1.Columns.Add(new System.Data.DataColumn("批号", typeof(System.String)));dataTable1.Columns.Add(new System.Data.DataColumn("数量", typeof(System.Int32)));dataTable1.Rows.Add(new Object[] { "0001", 100 });dataTable1.Rows.Add(new Object[] { "0002", 200 });dataTable1.Rows.Add(new Object[] { "0001", 300 });dataTable1.Rows.Add(new Object[] { "0002", 400 });dataTable1.Rows.Add(new Object[] { "0003", 500 });System.Data.DataView dv = dataTable1.DefaultView;System.Data.DataTable dataTable2 = dv.ToTable(true, "批号");String s = "";for (int i = 0; i < dataTable2.Rows.Count; i++){  String type = dataTable2.Rows[i][0].ToString();  s += type + "=" + dataTable1.Compute("Sum(数量)", "批号='" + type + "'").ToString() + Environment.NewLine;}MessageBox.Show(s);