DataGrid.AlternatingItemStyle Egenskap
Definition
Viktigt
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Hämtar formategenskaperna för att växla objekt i DataGrid kontrollen.
public:
virtual property System::Web::UI::WebControls::TableItemStyle ^ AlternatingItemStyle { System::Web::UI::WebControls::TableItemStyle ^ get(); };
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)]
public virtual System.Web.UI.WebControls.TableItemStyle AlternatingItemStyle { get; }
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)>]
member this.AlternatingItemStyle : System.Web.UI.WebControls.TableItemStyle
Public Overridable ReadOnly Property AlternatingItemStyle As TableItemStyle
Egenskapsvärde
Ett TableItemStyle objekt som representerar formategenskaperna för alternerande objekt i DataGrid. Standardvärdet är ett tomt TableItemStyle objekt.
- Attribut
Exempel
Följande kodexempel visar hur du använder AlternatingItemStyle egenskapen för att ange en annan bakgrundsfärg för att växla objekt i DataGrid kontrollen.
<%@ Page Language="C#" %>
<%@ 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">
ICollection CreateDataSource()
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
for (int i = 0; i <= 8; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i + 1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
void Page_Load(Object sender, EventArgs e)
{
if (!IsPostBack)
{
// Load this data only once.
ItemsGrid.DataSource= CreateDataSource();
ItemsGrid.DataBind();
}
}
</script>
<head runat="server">
<title>DataGrid AlternatingItemStyle Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataGrid AlternatingItemStyle Example</h3>
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="false"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<ItemStyle BackColor="Yellow">
</ItemStyle>
<AlternatingItemStyle BackColor="LightGreen">
</AlternatingItemStyle>
<Columns>
<asp:BoundColumn
HeaderText="Number"
DataField="IntegerValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Description"
DataField="StringValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Price"
DataField="CurrencyValue"
DataFormatString="{0:c}">
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
</form>
</body>
</html>
<%@ Page Language="VB" %>
<%@ 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
Dim dt As DataTable = New DataTable()
Dim dr As DataRow
Dim i As Integer
Dim dv As DataView
dt.Columns.Add(New DataColumn("IntegerValue", GetType(Integer)))
dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double)))
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
dv = New DataView(dt)
CreateDataSource = dv
End Function
Sub Page_Load(sender As Object, e As EventArgs)
If Not IsPostBack
' Load this data only once.
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End If
End Sub
</script>
<head runat="server">
<title>DataGrid AlternatingItemStyle Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataGrid AlternatingItemStyle Example</h3>
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="false"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<ItemStyle BackColor="Yellow">
</ItemStyle>
<AlternatingItemStyle BackColor="LightGreen">
</AlternatingItemStyle>
<Columns>
<asp:BoundColumn
HeaderText="Number"
DataField="IntegerValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Description"
DataField="StringValue">
</asp:BoundColumn>
<asp:BoundColumn
HeaderText="Price"
DataField="CurrencyValue"
DataFormatString="{0:c}">
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
</form>
</body>
</html>
<%@ Page Language="C#" 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">
ICollection CreateDataSource()
{
// Create sample data for the DataGrid control.
DataTable dt = new DataTable();
DataRow dr;
// Define the columns of the table.
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
// Populate the table with sample values.
for (int i = 0; i < 5; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i + 1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
void Page_Load(Object sender, EventArgs e)
{
// Load sample data only once, when the page is first loaded.
if (!IsPostBack)
{
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
}
void Selection_Change(Object sender, EventArgs e)
{
// Set the background color for the items and alternating items in
// the DataGrid control. Notice that the ItemStyle property affects
// the even-numbered items, while the AlternatingItemStyle property
// affects the odd-numbered items.
ItemsGrid.ItemStyle.BackColor =
System.Drawing.Color.FromName(ItemBackColorList.SelectedItem.Value);
ItemsGrid.AlternatingItemStyle.BackColor =
System.Drawing.Color.FromName(AltItemBackColorList.SelectedItem.Value);
}
</script>
<head runat="server">
<title>DataGrid ItemStyle and AlternatingItemStyle Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataGrid ItemStyle and AlternatingItemStyle Example</h3>
Select background colors for the items and alternating items.
<br /><br />
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="False"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<ItemStyle BackColor="White">
</ItemStyle>
<AlternatingItemStyle BackColor="White">
</AlternatingItemStyle>
<Columns>
<asp:BoundColumn DataField="IntegerValue"
HeaderText="Item"/>
<asp:BoundColumn DataField="StringValue"
HeaderText="Description"/>
<asp:BoundColumn DataField="CurrencyValue"
HeaderText="Price"
DataFormatString="{0:c}">
<ItemStyle HorizontalAlign="Right">
</ItemStyle>
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
<hr />
<table cellpadding="5">
<tr>
<td>
Item BackColor:
</td>
<td>
Alternating item BackColor:
</td>
</tr>
<tr>
<td>
<asp:DropDownList id="ItemBackColorList"
AutoPostBack="True"
OnSelectedIndexChanged="Selection_Change"
runat="server">
<asp:ListItem Selected="True" Value="White"> White </asp:ListItem>
<asp:ListItem Value="Silver"> Silver </asp:ListItem>
<asp:ListItem Value="DarkGray"> Dark Gray </asp:ListItem>
<asp:ListItem Value="Khaki"> Khaki </asp:ListItem>
<asp:ListItem Value="DarkKhaki"> Dark Khaki </asp:ListItem>
</asp:DropDownList>
</td>
<td>
<asp:DropDownList id="AltItemBackColorList"
AutoPostBack="True"
OnSelectedIndexChanged="Selection_Change"
runat="server">
<asp:ListItem Selected="True" Value="White"> White </asp:ListItem>
<asp:ListItem Value="Silver"> Silver </asp:ListItem>
<asp:ListItem Value="DarkGray"> Dark Gray </asp:ListItem>
<asp:ListItem Value="Khaki"> Khaki </asp:ListItem>
<asp:ListItem Value="DarkKhaki"> Dark Khaki </asp:ListItem>
</asp:DropDownList>
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ 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 4
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)
' Load sample data only once, when the page is first loaded.
If Not IsPostBack Then
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End If
End Sub
Sub Selection_Change(sender As Object, e As EventArgs)
' Set the background color for the items and alternating items in
' the DataGrid control. Notice that the ItemStyle property affects
' the even-numbered items, while the AlternatingItemStyle property
' affects the odd-numbered items.
ItemsGrid.ItemStyle.BackColor = _
System.Drawing.Color.FromName(ItemBackColorList.SelectedItem.Value)
ItemsGrid.AlternatingItemStyle.BackColor = _
System.Drawing.Color.FromName(AltItemBackColorList.SelectedItem.Value)
End Sub
</script>
<head runat="server">
<title>DataGrid ItemStyle and AlternatingItemStyle Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>DataGrid ItemStyle and AlternatingItemStyle Example</h3>
Select background colors for the items and alternating items.
<br /><br />
<b>Product List</b>
<asp:DataGrid id="ItemsGrid"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="False"
runat="server">
<HeaderStyle BackColor="#00aaaa">
</HeaderStyle>
<ItemStyle BackColor="White">
</ItemStyle>
<AlternatingItemStyle BackColor="White">
</AlternatingItemStyle>
<Columns>
<asp:BoundColumn DataField="IntegerValue"
HeaderText="Item"/>
<asp:BoundColumn DataField="StringValue"
HeaderText="Description"/>
<asp:BoundColumn DataField="CurrencyValue"
HeaderText="Price"
DataFormatString="{0:c}">
<ItemStyle HorizontalAlign="Right">
</ItemStyle>
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
<hr />
<table cellpadding="5">
<tr>
<td>
Item BackColor:
</td>
<td>
Alternating item BackColor:
</td>
</tr>
<tr>
<td>
<asp:DropDownList id="ItemBackColorList"
AutoPostBack="True"
OnSelectedIndexChanged="Selection_Change"
runat="server">
<asp:ListItem Selected="True" Value="White"> White </asp:ListItem>
<asp:ListItem Value="Silver"> Silver </asp:ListItem>
<asp:ListItem Value="DarkGray"> Dark Gray </asp:ListItem>
<asp:ListItem Value="Khaki"> Khaki </asp:ListItem>
<asp:ListItem Value="DarkKhaki"> Dark Khaki </asp:ListItem>
</asp:DropDownList>
</td>
<td>
<asp:DropDownList id="AltItemBackColorList"
AutoPostBack="True"
OnSelectedIndexChanged="Selection_Change"
runat="server">
<asp:ListItem Selected="True" Value="White"> White </asp:ListItem>
<asp:ListItem Value="Silver"> Silver </asp:ListItem>
<asp:ListItem Value="DarkGray"> Dark Gray </asp:ListItem>
<asp:ListItem Value="Khaki"> Khaki </asp:ListItem>
<asp:ListItem Value="DarkKhaki"> Dark Khaki </asp:ListItem>
</asp:DropDownList>
</td>
</tr>
</table>
</form>
</body>
</html>
Kommentarer
Använd egenskapen AlternatingItemStyle för att ange ett anpassat format för de alternerande objekten DataGrid i kontrollen. Vanliga formatattribut som kan justeras är forecolor, backcolor, teckensnitt och innehållsjustering i cellen. Om du tillhandahåller en annan stil förbättras kontrollens DataGrid utseende.
Objektformategenskaper i DataGrid kontrollen ärvs från en objektformategenskap till en annan via en hierarki. Objektstilegenskaper som anges lägre i hierarkin ärvs av objektformategenskaper högre upp i hierarkin. Om du till exempel anger ett rött teckensnitt för ItemStyle egenskapen har alla andra objektformategenskaper i DataGrid kontrollen även ett rött teckensnitt. På så sätt kan du ge kontrollen ett gemensamt utseende genom att ange en egenskap för ett objektformat. Du kan åsidosätta de ärvda formatinställningarna för en objektformategenskap som är högre i hierarkin genom att ange dess formategenskaper. Du kan till exempel ange ett blått teckensnitt för AlternatingItemStyle egenskapen och åsidosätta det röda teckensnitt som anges i egenskapen ItemStyle . I följande tabell visas hierarkiordningen från högsta till lägsta.
| Precedence | Formategenskap |
|---|---|
| 1 | EditItemStyle |
| 2 | SelectedItemStyle |
| 3 | AlternatingItemStyle |
| 4 | ItemStyle |
| 5 | ControlStyle |
Om du vill ange ett anpassat format för de alternerande objekten placerar du taggarna <AlternatingItemStyle> mellan kontrollens DataGrid inledande och avslutande taggar. Du kan sedan lista formatattributen i den inledande <AlternatingItemStyle> taggen.