 
<form id="form1" runat="server"> 
<ul> 
<li id="li1" runat="server">初始值1</li> 
<li id="li2" runat="server">初始值2</li> 
<li id="li3" runat="server">初始值3</li> 
<li id="li4" runat="server">初始值4</li> 
<li id="li5" runat="server">初始值5</li> 
<li id="li6" runat="server">初始值6</li> 
<li id="li7" runat="server">初始值7</li> 
<li id="li8" runat="server">初始值8</li> 
</ul> 
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" /> 
</form> 

aspx.cs代碼：

復(fù)制代碼代碼如下:

 
protected void Button1_Click(object sender, EventArgs e) 
{ 
//單擊按鈕后批量改變li元素的內(nèi)聯(lián)文本值及樣式 
for (int i = 1; i <= 8; i++) 
{ 
HtmlGenericControl li = this.FindControl("li" + i) as HtmlGenericControl; 
li.InnerHtml = "新值" + i.ToString(); 
li.Attributes.CssStyle.Value = "color:red"; 
} 
} 

方法二，將ul、li元素做成html控件，用ul控件的Controls集合遍歷。

aspx代碼：

復(fù)制代碼代碼如下:

 
<form id="form1" runat="server"> 
<ul id="ul1" runat="server"> 
<li runat="server">初始值1</li> 
<li runat="server">初始值2</li> 
<li runat="server">初始值3</li> 
<li runat="server">初始值4</li> 
<li runat="server">初始值5</li> 
<li runat="server">初始值6</li> 
<li runat="server">初始值7</li> 
<li runat="server">初始值8</li> 
</ul> 
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /> 
</form> 

aspx.cs代碼：

復(fù)制代碼代碼如下:

 
private int counter = 1; 
protected void Button1_Click(object sender, EventArgs e) 
{ 
//單擊按鈕后批量改變li元素的內(nèi)聯(lián)文本值及樣式 
foreach (Control control in ul1.Controls) 
{ 
if (control is HtmlGenericControl) 
{ 
HtmlGenericControl li = control as HtmlGenericControl; 
li.InnerHtml = "新值" + (counter++).ToString(); 
li.Attributes.CssStyle.Value = "color:red"; 
} 
} 
} 

方法三，利用HtmlAgilityPack，對元素以Dom方式操作。

aspx代碼：

復(fù)制代碼代碼如下:

 
<form id="form1" runat="server"> 
<ul id="ul1" runat="server"> 
<li>初始值1</li> 
<li>初始值2</li> 
<li>初始值3</li> 
<li>初始值4</li> 
<li>初始值5</li> 
<li>初始值6</li> 
<li>初始值7</li> 
<li>初始值8</li> 
</ul> 
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /> 
<asp:Button ID="Button2" runat="server" Text="測試空回發(fā)" /> 
</form> 

aspx.cs代碼：

復(fù)制代碼代碼如下:

 
protected void Button1_Click(object sender, EventArgs e) 
{ 
//單擊按鈕后批量改變li元素的內(nèi)聯(lián)文本值及樣式 
HtmlDocument htmlDoc = new HtmlDocument(); 
htmlDoc.LoadHtml(ul1.InnerHtml); 
HtmlNodeCollection lis = htmlDoc.DocumentNode.SelectNodes("li"); 
for (int i = 0; i < lis.Count; i++) 
{ 
lis[i].InnerHtml = "新值" + (i + 1).ToString(); 
lis[i].Attributes.Add("style", "color:red"); 
} 
ul1.InnerHtml = htmlDoc.DocumentNode.InnerHtml; 
} 

以上三種方法各有優(yōu)缺點(diǎn)，可根據(jù)實(shí)際情況選用。

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