本文整理汇总了C#中System.Data.DataView类的典型用法代码示例。如果您正苦于以下问题：C# DataView类的具体用法？C# DataView怎么用？C# DataView使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
DataView类属于System.Data命名空间，在下文中一共展示了DataView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: DemonstrateDataView
//引入命名空间
using System;
using System.Xml;
using System.Data;
using System.Data.Common;
using System.Windows.Forms;
public class Form1: Form
{
protected DataSet DataSet1;
protected DataGrid dataGrid1;
private void DemonstrateDataView()
{
// Create one DataTable with one column.
DataTable table = new DataTable("table");
DataColumn colItem = new DataColumn("item",
Type.GetType("System.String"));
table.Columns.Add(colItem);
// Add five items.
DataRow NewRow;
for(int i = 0; i <5; i++)
{
NewRow = table.NewRow();
NewRow["item"] = "Item " + i;
table.Rows.Add(NewRow);
}
// Change the values in the table.
table.AcceptChanges();
table.Rows[0]["item"]="cat";
table.Rows[1]["item"] = "dog";
// Create two DataView objects with the same table.
DataView firstView = new DataView(table);
DataView secondView = new DataView(table);
// Print current table values.
PrintTableOrView(table,"Current Values in Table");
// Set first DataView to show only modified
// versions of original rows.
firstView.RowStateFilter=DataViewRowState.ModifiedOriginal;
// Print values.
PrintTableOrView(firstView,"First DataView: ModifiedOriginal");
// Add one New row to the second view.
DataRowView rowView;
rowView=secondView.AddNew();
rowView["item"] = "fish";
// Set second DataView to show modified versions of
// current rows, or New rows.
secondView.RowStateFilter=DataViewRowState.ModifiedCurrent
| DataViewRowState.Added;
// Print modified and Added rows.
PrintTableOrView(secondView,
"Second DataView: ModifiedCurrent | Added");
}
private void PrintTableOrView(DataTable table, string label)
{
// This function prints values in the table or DataView.
Console.WriteLine("\n" + label);
for(int i = 0; i<table.Rows.Count;i++)
{
Console.WriteLine("\table" + table.Rows[i]["item"]);
}
Console.WriteLine();
}
private void PrintTableOrView(DataView view, string label)
{
// This overload prints values in the table or DataView.
Console.WriteLine("\n" + label);
for(int i = 0; i<view.Count;i++)
{
Console.WriteLine("\table" + view[i]["item"]);
}
Console.WriteLine();
}
}示例2:
DataTable orders = dataSet.Tables["SalesOrderHeader"];
EnumerableRowCollection<DataRow> query =
from order in orders.AsEnumerable()
where order.Field<bool>("OnlineOrderFlag") == true
orderby order.Field<decimal>("TotalDue")
select order;
DataView view = query.AsDataView();
bindingSource1.DataSource = view;