asp:CheckBox:
<asp:CheckBox id="MyControl" name="MyControl" Text="MyControl" runat="server"/>
asp:RadioButton:
<asp:RadioButton id="MyControl" Text="My RadioButton" GroupName="aaa" runat="server"/>
注：屬性GroupName與htmlinputRadioButton控件的name屬性等同!!
asp:HyperLink:
<asp:HyperLink id="MyControl" Text="My HyperLink" NavigateUrl="asp_hyperlink.aspx"
runat="server"/>
注:1 此控件的NavigateUrl和Target屬性的區(qū)別???
2 另可以添加name屬性例:
<asp:HyperLink id="MyControl" Text="Paragraph One" name="para1" runat="server"/>
接著在該頁面其它部位利用下面html元素到達(dá)Paragraph:
<a href="thepage.aspx#para1">Go to Paragraph</a>
實(shí)現(xiàn)創(chuàng)建一個(gè)"錨".
3 使用Attributes屬性:
進(jìn)行設(shè)置和修改:
MyAnchor.Attributes("name") = strNewName ;'
訪問:
strNewName = MyAnchor.Attributes("name");
因此,即使沒有Name屬性也可以用此法添上一個(gè)name屬性.當(dāng)想要為一個(gè)元素添加非標(biāo)準(zhǔn)的屬性時(shí),這種方
法很有用.
4 還可以應(yīng)用ImageUrl屬性實(shí)現(xiàn)使用圖像作為超連接.
asp:LinkButton:
<asp:LinkButton id="MyControl" Text="My LinkButton" runat="server"/>
注:默認(rèn)下將使用AutoPostBack功能,點(diǎn)擊后表單將會被返回到生成Click事件的服務(wù)器中.(估計(jì)這就是命
名為LinkButton的原因吧!類似于button)
此外,不能選擇使用圖像而只能使用文本.
asp:Image:(用于需要在頁面中顯示圖像,并且在服務(wù)端代碼中對該控件進(jìn)行訪問)
<asp:Image id="MyControl" ImageUrl="bokk.gif" runat="server"/>
asp:Panel:(創(chuàng)建格式化<div>元素的一種途徑)
<asp:Panel id="mycontrol" Text="aaa" runat="server">
some text inside the Panel control!
</asp:Panel>
注:對于任何服務(wù)器控件,可以使用Style集合添加自己額外的樣式屬性:
MyControl.Style("slector-name")="value";
asp:Label:
<asp:Label id="MyControl" Text="My label" runat="server"/>
注:此控件能客服<asp:Panel>控件自動換行的問題,能將其中的內(nèi)容與其它元素和文本排列在一行中!
asp:Button:
<asp:Button id="aa" Text="value" runat="server"/>
asp:ImageButton:
<asp:ImageButton id="s" ImageUrl="bool.gif" runat="server"/>
asp:TextBox:
<asp:TextBox id="aa" Text="ss" runat="Server"/>
注:使用TextMode屬性可以設(shè)置單行,多行和密碼模式
asp:Table:
<asp:Table id="aa" runat="server"/>
注:(附服務(wù)端處理程序)
int intRows = Convert.ToInt32(selRows.Value);
int intCols = Convert.ToInt32(selCols.Value);
int intRowCount;
int intColCount;
TableRow objRow;
TableCell objCell;
for (intRowCount = 0; intRowCount <= intRows - 1; intRowCount++)
{
objRow = new TableRow();
for (intColCount = 0; intColCount <= intCols - 1; ++intColCount)
{
objCell = new TableCell();
objCell.Controls.Add(new LiteralControl("R" + intRowCount.ToString() + "C" +
intColCount.ToString()));
objRow.Cells.Add(objCell);
}
MyControl.Rows.Add(objRow);
}
//此處asp:Table與htmlTable的區(qū)別是:
asp:Table:
objCell.Controls.Add(new LiteralControl("R" + intRowCount.ToString() + "C" +
intColCount.ToString()));
而htmlTable:
objCell.InnerHtml = "R"+intRowCount+"c"+intColCount;
原因在于htmlTable控件的objCell是HtmlTableCell對象,而asp:Table中objCell則是TableCell對象
asp:Literal:(構(gòu)著函數(shù):new LiteralControl("String");)
<asp:Literal Text="Some" runat="server"/>
注:此控件只有一個(gè)Text屬性,它不會產(chǎn)生其他的輸出(例如不會生成html元素)因此當(dāng)所需的工作是將一
些文本放到頁面中的時(shí)候很有用.
例:
<asp:Literal Text="<gloop>A custom element</gloop>" runat="server"/>
產(chǎn)生輸出:
<gloop>A custom element</gloop>
asp:PlaceHolder:
<asp:PlaceHolder id="mycontrol" runat="server"/>
<script runat="server">
private void Page_Load()
{
int intLoop;
TextBox obj;
for(intLoop=0;intLoop<3;intLoop++)
{
obj = new TextBox();
mycontrol.Controls.Add(obj);
}
}
</script>
注:如果希望在頁面中動態(tài)的創(chuàng)建控件,而不是在頁面源代碼中對控件進(jìn)行顯示聲明時(shí)可以用此控件.
下面討論事件相應(yīng):(click事件和change事件)
<%@Page Language="C#" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<!-- #include file="style.inc" -->
</head>
<body>
<!--------------------------------------------------------------------------->
<span class="heading">The ASP Web Forms Control Events</span><p />
<form runat="server">
<table border="0" cellpadding="10"><tr><td nowrap="nowrap" colspan="2">
<asp:TextBox id="MyText" Text="OriginalValue" runat="server"
OnTextChanged="MyChangeCode" AutoPostBack="True" />
//事件:OnTextChanged="MyChangeCode"
<span class="cite">Press 'Tab' to submit Textbox value automatically</span>
</td></tr><tr><td nowrap="nowrap">
<asp:CheckBox id="MyCheckbox" Text="My CheckBox" runat="server"
OnCheckedChanged="MyChangeCode" AutoPostBack="True" />
//事件:OnCheckedChanged="MyChangeCode"
</td><td nowrap="nowrap">
<asp:DropDownList id="MyDropDownList" runat="server"
OnSelectedIndexChanged="MyListChangeCode" AutoPostBack="true">
//事件:OnSelectedIndexChanged="MyListChangeCode"
<asp:ListItem Text="Option 1" Value="Value 1" />
<asp:ListItem Text="Option 2" Value="Value 2" />
<asp:ListItem Text="Option 3" Value="Value 3" />
</asp:DropDownList>
</td></tr><tr><td nowrap="nowrap">
<asp:RadioButtonList id="MyRadioList" runat="server"
OnSelectedIndexChanged="MyListChangeCode" AutoPostBack="true">
//事件:OnSelectedIndexChanged="MyListChangeCode"
<asp:ListItem Text="Option 1" Value="Value 1" />
<asp:ListItem Text="Option 2" Value="Value 2" />
<asp:ListItem Text="Option 3" Value="Value 3" />
</asp:RadioButtonList>
</td><td nowrap="nowrap">
<asp:ImageButton id="MyImageButton" ImageUrl="ClickmeButton.gif" runat="server"
ImageAlign="absbottom" OnClick="MyImageCode" /><p />
//事件:OnClick="MyImageCode"
<asp:Button id="MyButton" Text="Submit" runat="server"
OnClick="MyClickCode" />
//事件:OnClick="MyClickCode"
</table>
</form>
<div id="divResult" runat="server" EnableViewState="False" />
<script runat="server">
//事件處理函數(shù):
void MyChangeCode(Object objSender, EventArgs objArgs)
{
Control c = (Control)objSender;
divResult.InnerHtml += "Change event detected for control '"
+ c.ID + "'<br />";
}
void MyListChangeCode(Object objSender, EventArgs objArgs)
{
ListControl c = (ListControl)objSender;
divResult.InnerHtml += "Change event detected for control '"
+ c.ID + "'<br />SelectedIndex is '"
+ c.SelectedIndex
+ "', selected item text is '"
+ c.SelectedItem.Text
+ "', selected item value is '"
+ c.SelectedItem.Value + "'<br />";
}
void MyClickCode(Object objSender, EventArgs objArgs)
{
Button c = (Button)objSender;
divResult.InnerHtml += "Click event detected for control '"
+ c.ID + "'<br />";
}
void MyImageCode(Object objSender, ImageClickEventArgs objArgs)
{
ImageButton c = (ImageButton)objSender;
divResult.InnerHtml += "Click event detected in control '"
+ c.ID + "' at X=" + objArgs.X
+ " Y=" + objArgs.Y + "<br />";
}
</script>
接著是命令控件:
Button,ImageButton,LinkButton有屬性CommandName和CommandArgument,當(dāng)按鈕被點(diǎn)擊后,在服務(wù)端生成
一個(gè)可被響應(yīng)的Command事件,例:
<asp:Button id="MyButton" OnCommand="MyCommandCode"
Text="Run Command" runat="server"
ToolTip="This is a Button control" />
<asp:ImageButton id="MyImageButton" OnCommand="MyCommandCode"
ImageUrl="ClickmeButton.gif" runat="server" ImageAlign="absbottom"
ToolTip="This is an ImageButton control" />
<asp:LinkButton id="MyLinkButton" OnCommand="MyCommandCode"
Text="Run Command" runat="server"
ToolTip="This is a LinkButton control" />
//事件處理函數(shù):
void MyCommandCode(Object objSender, CommandEventArgs objArgs)
{
Control c = (Control)objSender;
divResult.InnerHtml += "Command event detected for control '"
+ c.ID + "'<br />"
+ "CommandName is '"
+ objArgs.CommandName
+ "', CommandArgument is '"
+ objArgs.CommandArgument + "'";
}
優(yōu)點(diǎn):
1 當(dāng)一個(gè)表單上有多個(gè)按鈕控件時(shí)可以利用它來檢測是單擊哪個(gè)按鈕來提交表單.
以前版本中是通過對Request.Form集合進(jìn)行查詢(若表單的method設(shè)置為get那么就需要對
Request.QueryString檢查)以確定單擊了哪個(gè)按鈕.
2 對復(fù)雜的控件如datagrid進(jìn)行處理時(shí)通過對CommandName屬性設(shè)置預(yù)先定義好的值,那么當(dāng)在datagrid
控件中對數(shù)據(jù)進(jìn)行編輯的時(shí)候就可以利用這些按鈕來完成專有控件的任務(wù).
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