彩票走势图

三、使用代码绑定到SQL数据

以下代码说明了如何使用SqlDataSource组件在运行时将GridControl绑定到SQL数据。

在此示例中，使用的是CustomSqlQuery。要了解其他查询类型，请参阅和类的说明。

要了解支持的数据库引擎，请参阅的继承层次结构。

[C#]

using DevExpress.DataAccess.ConnectionParameters;
using DevExpress.DataAccess.Sql;
// . . . 
// Create a data source. 
Access97ConnectionParameters connectionParameters = new Access97ConnectionParameters("D:\\Work\\nwind.mdb", "", "");
SqlDataSource ds = new SqlDataSource(connectionParameters);

// Create an SQL query to access the Products table. 
CustomSqlQuery query = new CustomSqlQuery();
query.Name = "customQuery1";
query.Sql = "SELECT [Products].[ProductID], [Products].[ProductName], [Products].[QuantityPerUnit], [Products].[UnitPrice], " 
    + "[Products].[UnitsInStock], [Products].[UnitsOnOrder], [Products].[ReorderLevel], [Products].[Discontinued] " 
    +"FROM [Products] [Products]";

ds.Queries.Add(query);
ds.Fill();

//Assign the data source for the grid and retrieve fields. 
gridControl1.DataSource = ds;
gridControl1.DataMember = "customQuery1";

[VB]

Imports DevExpress.DataAccess.ConnectionParameters
Imports DevExpress.DataAccess.Sql
' . . .  
' Create a data source.  
Private connectionParameters As New Access97ConnectionParameters("D:\Work\nwind.mdb", "", "")
Private ds As New SqlDataSource(connectionParameters)

' Create an SQL query to access the Products table.  
Private query As New CustomSqlQuery()
query.Name = "customQuery1" 
query.Sql = "SELECT [Products].[ProductID], [Products].[ProductName], [Products].[QuantityPerUnit], [Products].[UnitPrice], " & "[Products].[UnitsInStock], [Products].[UnitsOnOrder], [Products].[ReorderLevel], [Products].[Discontinued] " & "FROM [Products] [Products]" 

ds.Queries.Add(query)
ds.Fill()

'Assign the data source for the grid and retrieve fields.  
gridControl1.DataSource = ds
gridControl1.DataMember = "customQuery1"

请注意，在控件绑定到数据源之后，具体控件可能需要其他自定义。有关更多信息，请参阅相应控件的文档。

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