使用AddRange方法一次性添加多列: DataTable dt = new DataTable(); dt.Columns.AddRange(new DataColumn[] { new DataColumn("Column1"), new DataColumn("Column2") }); 复制代码 设置列的属性: DataTable dt = new DataTable(); DataColumn column = dt.Columns.Add("ColumnName", typeof(int));...
myRow1["总店数"] = ReturnDt.Compute("SUM(总店数)","");//ReturnDt.Rows.Add(myRow1);//插入到最后一行ReturnDt.Rows.InsertAt(myRow1,0);//插入到第一行} }//删除列//ReturnDt.Columns.Remove("销售总件数");//调整列顺序 ,列排序从0开始ReturnDt.Columns["分公司名称"].SetOrdinal(0);//...
使用循环批量添加列: DataTable dt = new DataTable(); for(int i = 0; i < 10; i++) { dt.Columns.Add("Column" + i.ToString(), typeof(string)); } 复制代码 使用AddRange方法批量添加列: DataTable dt = new DataTable(); List<DataColumn> columns = new List<DataColumn>(); for(in...
DataTable dt =new DataTable(); dt.Columns.AddRange(new DataColumn[]{ new DataColumn("Id",typeof(int)), new DataColumn("UserName",typeof(string)), new DataColumn("Pwd",typeof(string))}); return dt; } staticvoid Main(string[] args) { Stopwatch sw =new Stopwatch(); for (int multi...
dt.Columns.AddRange(new DataColumn[] { new DataColumn("name", typeof(string)), new DataColumn("sex", typeof(string)), new DataColumn("score", typeof(int)) }); dt.Rows.Add(new object[] { "张三","男",1 }); dt.Rows.Add(new object[] { "张三","男",4 }); ...
publicstaticvoidDataTableCollectionAddRange(){// create a DataSet with two tablesDataSet dataSet =newDataSet();// create Customer tableDataTable customersTable =newDataTable("Customers"); customersTable.Columns.Add("customerId",typeof(int)).AutoIncrement =true; customersTable.Columns.Add("name",t...
dataTable.Columns.AddRange(new DataColumn[] { new DataColumn("A"),new DataColumn("B"),new DataColumn("C"),new DataColumn("D")});for (int i = 0; i < 50000; i++){ dataTable.Rows.Add(new object[] { 0, 0, "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + i.ToString(), 0 });data...
假定我们有如下结构的DataTable:var dt = new DataTable();dt.Columns.AddRange(new[] { new DataColumn("col1",typeof(int)), new DataColumn("col2",typeof(int)), new DataColumn("col3",typeof(int)), new DataColumn("col4",typeof(int)) });放点数据行...
dt.Columns.AddRange(props.Select(p => new DataColumn(p.Name, p.PropertyType)).ToArray()); if (collection.Count() > 0) { for (int i = 0; i < collection.Count(); i++) { ArrayList tempList = new ArrayList(); foreach (PropertyInfo pi in props) { object obj = pi...
dt.Columns.AddRange(newDataColumn[] {newDataColumn("name",typeof(string)), newDataColumn("sex",typeof(string)), newDataColumn("score",typeof(int)) }); dt.Rows.Add(newobject[] {"张三","男",1}); dt.Rows.Add(newobject[] {"张三","男",4}); ...