本文整理汇总了C#中System.Data.DataColumn类的典型用法代码示例。如果您正苦于以下问题：C# DataColumn类的具体用法？C# DataColumn怎么用？C# DataColumn使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
DataColumn类属于System.Data命名空间，在下文中一共展示了DataColumn类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: MakeTable
private void MakeTable()
{
// Create a DataTable.
DataTable table = new DataTable("Product");
// Create a DataColumn and set various properties.
DataColumn column = new DataColumn();
column.DataType = System.Type.GetType("System.Decimal");
column.AllowDBNull = false;
column.Caption = "Price";
column.ColumnName = "Price";
column.DefaultValue = 25;
// Add the column to the table.
table.Columns.Add(column);
// Add 10 rows and set values.
DataRow row;
for(int i = 0; i < 10; i++)
{
row = table.NewRow();
row["Price"] = i + 1;
// Be sure to add the new row to the
// DataRowCollection.
table.Rows.Add(row);
}
}示例2: new DataColumn
//引入命名空间
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
class Program {
static void Main(string[] args) {
DataSet carsInventoryDS = new DataSet("Inventory");
carsInventoryDS.ExtendedProperties["TimeStamp"] = DateTime.Now;
carsInventoryDS.ExtendedProperties["Company"] = "Name";
DataColumn carIDColumn = new DataColumn("CarID", typeof(int));
carIDColumn.ReadOnly = true;
carIDColumn.Caption = "Car ID";
carIDColumn.AllowDBNull = false;
carIDColumn.Unique = true;
carIDColumn.AutoIncrement = true;
carIDColumn.AutoIncrementSeed = 0;
carIDColumn.AutoIncrementStep = 1;
carIDColumn.ColumnMapping = MappingType.Attribute;
DataColumn carMakeColumn = new DataColumn("Make", typeof(string));
DataColumn carColorColumn = new DataColumn("Color", typeof(string));
DataColumn carPetNameColumn = new DataColumn("PetName", typeof(string));
carPetNameColumn.Caption = "Name";
DataTable inventoryTable = new DataTable("Inventory");
inventoryTable.Columns.AddRange(new DataColumn[] { carIDColumn, carMakeColumn, carColorColumn, carPetNameColumn });
inventoryTable.PrimaryKey = new DataColumn[] { inventoryTable.Columns[0] };
DataRow carRow = inventoryTable.NewRow();
carRow["Make"] = "B";
carRow["Color"] = "C";
carRow["PetName"] = "A";
inventoryTable.Rows.Add(carRow);
carRow = inventoryTable.NewRow();
carRow["Make"] = "S";
carRow["Color"] = "R";
carRow["PetName"] = "E";
inventoryTable.Rows.Add(carRow);
carsInventoryDS.Tables.Add(inventoryTable);
PrintTable(carsInventoryDS.Tables["Inventory"]);
}
private static void PrintTable(DataTable dt) {
DataTableReader dtReader = dt.CreateDataReader();
while (dtReader.Read()) {
for (int i = 0; i < dtReader.FieldCount; i++) {
Console.Write("{0} = {1} ",
dtReader.GetName(i).Trim(),
dtReader.GetValue(i).ToString().Trim());
}
Console.WriteLine();
}
dtReader.Close();
}
}