首先要理解 DataTable是一个虚拟表，里面存有数据列，既然是虚拟的就不能够为它去设置宽度，如果设置的话可以对其绑定的控件进行设置。例如：绑定的控件对象为DataGridView那么可以这样 datagridview1.datasource = datatable；datagridview1.Column[0].Width = 100;这样就可以将控件上第一列的数据宽设置为100.1privatevoid ShowDtails_Click(object sender, EventArgs e)
2 {
3 dataGridView2.DataSource = c...
DataTable的列操作
public DataTable GenerateTable(){//对Table1添加列名，并设置列值类型DataTable dt1 = new DataTable();//创建Tabledt1.Columns.Add("ID", typeof(string));dt1.Columns.Add("NAME", typeof(string));dt1.Columns.Add("AGE", typeof(System.Decimal));dt1.Columns.Add("SEX", typeof(string));//此列放置的顺序dt1.Columns["SEX"].SetOrdinal(2);//对Table1进行设置KEYdt1.PrimaryKey = new DataColumn...
static DataTable ConvertDataReaderToDataTable(SqlDataReader reader)
{try{DataTable objDataTable = new DataTable();int intFieldCount = reader.FieldCount;for (int intCounter = 0; intCounter < intFieldCount; ++intCounter){objDataTable.Columns.Add(reader.GetName(intCounter), reader.GetFieldType(intCounter));}objDataTable.BeginLoadData();object[] objValues = new object[intFieldCount];while (reader.Read...
DataTable移除行strFilter = "PaymentDate = ‘" + DateTime.MinValue + "‘ OR PaymentAmount = ‘" + decimal.Zero + "‘ OR VC_PaymentMode = ‘" + string.Empty + "‘ OR VC_PaymentMode IS NULL "; DataRow[] drsIncompleteData = null; drsIncompleteData = _Model.PurchasePaymentItemEntityList.GetEntityDataTable().Select(strFi...
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace RemoveDupRowDemoTest
{class Program{staticvoid Main(string[] args){DataTable _dt = new DataTable();_dt.Columns.Add("id", typeof(int));_dt.Columns.Add("name", typeof(string));_dt.Columns.Add("address", typeof(string));DataRow _dr = _dt.NewRow();_dr["id"] = ...
<summary>/// SqlDataReader 转成 DataTable/// 源需要是结果集/// </summary>/// <param name="dataReader"></param>/// <returns></returns>private static DataTable ConvertDataReaderToDataTable(SqlDataReader dataReader){///定义DataTable DataTable datatable = new DataTable();try{ ///动态添加表的数据列 for (int i = 0; i < dataReader.FieldCount; i++){DataColumn myDataColumn = new DataColumn();myDataCol...
