手动建立DataTable
方法一:
DataTable tblDatas = new DataTable("Datas");
DataColumn dc = null;
dc = tblDatas.Columns.Add("ID", Type.GetType("System.Int32"));
dc.AutoIncrement = true;//自动增加
dc.AutoIncrementSeed = 1;//起始为1
dc.AutoIncrementStep = 1;//步长为1
dc.AllowDBNull = false;//
dc = tblDatas.Columns.Add("Product", Type.GetType("System.String"));
dc = tblDatas.Columns.Add("Version", Type.GetType("System.String"));
dc = tblDatas.Columns.Add("Description", Type.GetType("System.String"));
DataRow newRow;
newRow = tblDatas.NewRow();
newRow["Product"] = "水果刀";
newRow["Version"] = "2.0";
newRow["Description"] = "打架专用";
tblDatas.Rows.Add(newRow);
newRow = tblDatas.NewRow();
newRow["Product"] = "折叠凳";
newRow["Version"] = "3.0";
newRow["Description"] = "行走江湖七武器之一";
tblDatas.Rows.Add(newRow);
方法二:
//创建datatable 的一个示例
DataTable tblDatas = new DataTable("Datas");
tblDatas.Columns.Add("ID", Type.GetType("System.Int32")); //创建一列,自动增长
tblDatas.Columns[0].AutoIncrement = true;
tblDatas.Columns[0].AutoIncrementSeed = 1;
tblDatas.Columns[0].AutoIncrementStep = 1;
tblDatas.Columns.Add("Product", Type.GetType("System.String")); //创建一列
tblDatas.Columns.Add("Version", Type.GetType("System.String"));
tblDatas.Columns.Add("Description", Type.GetType("System.String"));
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" }); //创建一行
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
tblDatas.Rows.Add(new object[] { null, "a", "b", "c" });
//2,在DataTable中添加两列 时间
DataColumn dc1 = new DataColumn("Year");
DataColumn dc2 = new DataColumn("Month");
dt.Columns.Add(dc1);
dt.Columns.Add(dc2);
//给新添加的两列添加数据
for (int i = 0; i < dt.Rows.Count; i++)
{
DataRow dr = dt.Rows[i];
dr.BeginEdit();
dr["Year"] = "2009"
dr["Month"] = "10";
dr.EndEdit();
dt.AcceptChanges();
}
作者:沐雪
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