DataGrid Constructor ()
.NET Framework (current version)
Initializes a new instance of the DataGrid class.
Assembly: System.Web (in System.Web.dll)
The following code example demonstrates how to create and initialize a new instance of the DataGrid class.
<%@ Page Language="VB" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <script runat="server"> Function CreateDataSource() As ICollection ' Create sample data for the DataGrid control. Dim dt As DataTable = New DataTable() Dim dr As DataRow ' Define the columns of the table. dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32))) dt.Columns.Add(New DataColumn("StringValue", GetType(string))) dt.Columns.Add(New DataColumn("CurrencyValue", GetType(double))) ' Populate the table with sample values. Dim i As Integer For i = 0 to 8 dr = dt.NewRow() dr(0) = i dr(1) = "Item " & i.ToString() dr(2) = 1.23 * (i + 1) dt.Rows.Add(dr) Next i Dim dv As DataView = New DataView(dt) Return dv End Function Sub Page_Load(sender As Object, e As EventArgs) ' Create a DataGrid control. Dim ItemsGrid As DataGrid = New DataGrid() ' Set the properties of the DataGrid. ItemsGrid.ID = "ItemsGrid" ItemsGrid.BorderColor = System.Drawing.Color.Black ItemsGrid.CellPadding = 3 ItemsGrid.AutoGenerateColumns = False ' Set the styles for the DataGrid. ItemsGrid.HeaderStyle.BackColor = System.Drawing.Color.FromArgb(&H0000aaaa) ' Create the columns for the DataGrid control. The DataGrid ' columns are dynamically generated. Therefore, the columns ' must be re-created each time the page is refreshed. ' Create and add the columns to the collection. ItemsGrid.Columns.Add(CreateBoundColumn("IntegerValue", "Item")) ItemsGrid.Columns.Add( _ CreateBoundColumn("StringValue", "Description")) ItemsGrid.Columns.Add( _ CreateBoundColumn("CurrencyValue", "Price", "{0:c}", _ HorizontalAlign.Right)) ItemsGrid.Columns.Add( _ CreateLinkColumn("http:'www.microsoft.com", "_self", _ "Microsoft", "Related link")) ' Specify the data source and bind it to the control. ItemsGrid.DataSource = CreateDataSource() ItemsGrid.DataBind() ' Add the DataGrid control to the Controls collection of ' the PlaceHolder control. Place.Controls.Add(ItemsGrid) End Sub Function CreateBoundColumn(DataFieldValue As String, HeaderTextValue As String) As BoundColumn ' This version of CreateBoundColumn method sets only the ' DataField and HeaderText properties. ' Create a BoundColumn. Dim column As BoundColumn = New BoundColumn() ' Set the properties of the BoundColumn. column.DataField = DataFieldValue column.HeaderText = HeaderTextValue Return column End Function Function CreateBoundColumn(DataFieldValue As String, _ HeaderTextValue As String, FormatValue As String, _ AlignValue As HorizontalAlign) As BoundColumn ' This version of CreateBoundColumn method sets the DataField, ' HeaderText, and DataFormatString properties. It also sets the ' HorizontalAlign property of the ItemStyle property of the column. ' Create a BoundColumn using the overloaded CreateBoundColumn method. Dim column As BoundColumn = CreateBoundColumn(DataFieldValue, HeaderTextValue) ' Set the properties of the BoundColumn. column.DataFormatString = FormatValue column.ItemStyle.HorizontalAlign = AlignValue Return column End Function Function CreateLinkColumn(NavUrlValue As String, TargetValue As String, _ TextValue As String, HeaderTextValue As String) As HyperLinkColumn ' Create a BoundColumn. Dim column As HyperLinkColumn = New HyperLinkColumn() ' Set the properties of the ButtonColumn. column.NavigateUrl = NavUrlValue column.Target = TargetValue column.Text = TextValue column.HeaderText = HeaderTextValue Return column End Function </script> <head runat="server"> <title>DataGrid Constructor Example</title> </head> <body> <form id="form1" runat="server"> <h3>DataGrid Constructor Example</h3> <b>Product List</b> <asp:PlaceHolder id="Place" runat="server"/> </form> </body> </html>
.NET Framework
Available since 1.1
Available since 1.1
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