动态创建DataTable[转]

DataTable添加列和行的方法

C#  方法一:

DataTable  tblDatas = newDataTable("Datas"); DataColumn dc = null;

//赋值给dc，是便于对每一个datacolumn的操作 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"] = "大话西游"; newRow["Version"] = "2.0"; newRow["Description"] = "我很喜欢"; tblDatas.Rows.Add(newRow);

newRow = tblDatas.NewRow(); newRow["Product"] = "梦幻西游"; newRow["Version"] = "3.0"; newRow["Description"] = "比大话更幼稚"; tblDatas.Rows.Add(newRow);

方法二:

DataTable tblDatas = newDataTable("Datas"); tblDatas.Columns.Add("ID", Type.GetType("System.Int32")); tblDatas.Columns[0].AutoIncrement = true; tblDatas.Columns[0].AutoIncrementSeed = 1; tblDatas.Columns[0].AutoIncrementStep = 1;

tblDatas.Columns.Add("Product",Type.GetType("System.String")); tblDatas.Columns.Add("Version",Type.GetType("System.String")); tblDatas.Columns.Add("Description",Type.GetType("System.String"));

tblDatas.Rows.Add(newobject[]{null,"a","b","c"}); tblDatas.Rows.Add(newobject[] { 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" });

方法三： DataTable table = new DataTable ();

  //创建table的第一列 DataColumn priceColumn = new DataColumn(); //该列的数据类型 priceColumn.DataType = System.Type.GetType("System.Decimal"); //该列得名称 priceColumn.ColumnName = "price"; //该列得默认值 priceColumn.DefaultValue =50;

// 创建table的第二列 DataColumn taxColumn = new DataColumn(); taxColumn.DataType = System.Type.GetType("System.Decimal"); //列名 taxColumn.ColumnName = "tax"; //设置该列得表达式，用于计算列中的值或创建聚合列 taxColumn.expression_r_r = "price *0.0862"; // Create third column. DataColumn totalColumn = new DataColumn(); totalColumn.DataType = System.Type.GetType("System.Decimal"); totalColumn.ColumnName = "total"; //该列的表达式，值是得到的是第一列和第二列值得和 totalColumn.expression_r_r = "price + tax";

// 将所有的列添加到table上 table.Columns.Add(priceColumn); table.Columns.Add(taxColumn); table.Columns.Add(totalColumn);

//创建一行 DataRow row = table.NewRow(); //将此行添加到table中 table.Rows.Add(row);

//将table放在试图中 DataViewview = new DataView(table); dg.DataSource = view;

dg.DataBind();