DataTable <em>修改</em>行的指定值
public DataTable DepartmentDiseaseCharts()
{
DataTable dt = new DataTable();
using (ServiceController.EF.MSISEntities context = new ServiceCont...
'添加列名
Dim dt As New DataTable
dt.Columns.Add(New DataColumn("列名1"))
dt.Columns.Add(New DataColumn("列名2"))
dt.Columns.Add(New DataColumn("列名3"))
'从数据库中提取出来DataTalbe显示到DataGridView<em>修改</em>列名
dgv.DataSource ...
1、一列
workTable.PrimaryKey = new DataColumn[] {workTable.Columns["CustID"]};
// Or
DataColumn[] columns = new DataColumn[1];
columns[0] = workTable.Columns["CustID"];
workTable.PrimaryKey = co
1.DatatTable 某个字段是否重复
DataTable dtTableDisinit = (DataTable)this.c1TrueDBGrid1.DataSource;
DataView dv = new DataView(dtTableDisinit);
if (dv.Count != dv.ToTable(tru
因为业务需要,修要<em>修改</em>某个字段数据类型有number(5),变为number(5,2)型 要是没有数据的话直接用以下语句即可 alter table tb_test modify permile number(5,2); 但是有数据的话 就不能用上面方法了, alter table tb_test add permile_temp number(5,2) update tb_test set pe