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【ASP.NET】服务器控件大演练与实例分析

發(fā)布時(shí)間：2024/4/15 asp.net 32 豆豆

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asp服務(wù)器控件

簡(jiǎn)介（特點(diǎn)）：保存視圖狀態(tài)，公共對(duì)象模型，簡(jiǎn)單，用戶定制，創(chuàng)建瀏覽器特定HTML

?web服務(wù)器控件：文本控件（2個(gè)）

??? 1）?TextBox控件

<asp:TextBox ID="TextBox5" runat="server" AutoPostBack="True"?? BackColor="#CCCCCC" BorderColor="#FF0080" BorderStyle="Solid" BorderWidth="3px"? Font-Bold="True" Font-Overline="True" Font-Size="Larger" Font-Strikeout="False"? ForeColor="Red" Height="79px" MaxLength="12"? ontextchanged="TextBox5_TextChanged" ReadOnly="True" TextMode="MultiLine" ToolTip="這是一個(gè)文本控件" ViewStateMode="Enabled" Width="282px">文本控件屬性事件</asp:TextBox>
??????2） Label控件

控制權(quán)轉(zhuǎn)移控件（4個(gè)）1）Button 2）ImageButton3）LinkButton4）HyperLink

2?? 選擇控件，（4）

1）DropDownList控件

代碼如下：

View Code 1 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) 2 { 3 dlbl.Text = "你選擇的是" +DropDownList1.SelectedItem.Value +"."; 4 }

2）CheckBoxList控件

代碼如下：

View Code 1 protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e) 2 { 3 string str = ""; 4 foreach (ListItem item in CheckBoxList1.Items) 5 { 6 if (item.Selected) 7 { 8 str+=item.Value+""; 9 } 10 } 11 chlbl.Text = "你選擇的是：" + str + "."; 12 }

3）RadioButtonList控件

代碼如下：

View Code 1 protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e) 2 { 3 string str = ""; 4 foreach (ListItem item in RadioButtonList1.Items) 5 { 6 if (item.Selected) 7 { 8 str = item.Value + ""; 9 } 10 } 11 rlbl.Text = "你選擇的是：" + str + "."; 12 }

4）ListBox控件

View Code <asp:ListBox ID="ListBox1" runat="server" AutoPostBack="True" onselectedindexchanged="ListBox1_SelectedIndexChanged" SelectionMode="Multiple"><asp:ListItem>唱歌</asp:ListItem><asp:ListItem>寫(xiě)代碼</asp:ListItem><asp:ListItem>游戲</asp:ListItem></asp:ListBox><br /><br /><asp:Label ID="lbrlbl" runat="server" /> View Code 1 protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e) 2 { 3 string str = ""; 4 foreach (ListItem item in ListBox1.Items) 5 { 6 if (item.Selected) 7 { 8 str += item.Value + ""; 9 } 10 } 11 lbrlbl.Text = "你選擇的是：" + str + "."; 12 }

3? 容器控件

1）Panel控件

panel.aspx:

View Code <asp:Panel ID="Panel1" runat="server" BorderColor="Blue" BorderStyle="Solid" BorderWidth="4px" Height="45px" οnlοad="Panel1_Load" Width="543px"></asp:Panel>

panel.aspx.cs

View Code 1 protected void Panel1_Load(object sender, EventArgs e) 2 { 3 TextBox text = new TextBox(); 4 text.BorderColor = System.Drawing.Color.Red; 5 text.BorderStyle = BorderStyle.Solid; 6 text.BorderWidth = 2; 7 text.Text = "this is panel test page."; 8 this.Panel1.Controls.Add(text); 9 }

2）PlaceHolder控件

placeholder.aspx:

View Code <asp:PlaceHolder ID="PlaceHolder1" runat="server" οnlοad="PlaceHolder1_Load"></asp:PlaceHolder>

placeholder.aspx.cs:

View Code 1 protected void PlaceHolder1_Load(object sender, EventArgs e) 2 { 3 TextBox text = new TextBox(); 4 text.BorderColor = System.Drawing.Color.Red; 5 text.BorderStyle = BorderStyle.Solid; 6 text.BorderWidth = 2; 7 text.Text = "this is panel test page."; 8 this.PlaceHolder1.Controls.Add(text); 9 }

? 4 ?HTML服務(wù)器控件：

HtmlFrom控件，

?<form id="form1" runat="server" method="post" action="目標(biāo)頁(yè)面的URL"></form>

5 HtmlImage控件

? 6 驗(yàn)證控件：

通過(guò)一個(gè)實(shí)例驗(yàn)證所有控件

前臺(tái)代碼：

View Code 1 <asp:Panel ID="Panel2" runat="server" Height="382px" style=" margin-left:300px" Width="440px" BackColor="#99CCFF" BorderColor="Red" BorderWidth="4px"> 2 <div id="div1"> 3 <ul style="font-size:small; vertical-align:middle;"> 4 <li style=" font-size:large; text-align: center;">用戶注冊(cè)</li> 5 <li>用戶名：  <asp:TextBox ID="txtname" runat="server"/> 6 <asp:RequiredFieldValidator ID="rfvname" runat="server" ErrorMessage="用戶名不能為空" ForeColor="red" ControlToValidate="txtname"></asp:RequiredFieldValidator> 7 <asp:CustomValidator ID="CustomValidator1" runat="server" ControlToValidate="txtname" ForeColor="Red" ErrorMessage="必須包含a" onservervalidate="CustomValidator1_ServerValidate"></asp:CustomValidator> 8 </li> 9 <li>密碼：   <asp:TextBox ID="txtpass" runat="server"/> 10 <asp:RequiredFieldValidator ID="rfvpwd" runat="server" ControlToValidate="txtpass" ForeColor="red" ErrorMessage="密碼不能為空"></asp:RequiredFieldValidator> 11 </li> 12 <li>確認(rèn)密碼：  <asp:TextBox ID="txtrepass" runat="server"/> 13 <asp:CompareValidator ID="cvpwd" runat="server" ControlToCompare="txtpass" ForeColor="red" ControlToValidate="txtrepass" ErrorMessage="確認(rèn)密碼和密碼必須相同"></asp:CompareValidator> 14 </li> 15 <li> 16 出生日期：   <asp:TextBox ID="txtbirthday" runat="server" /> 17 <asp:CompareValidator ID="cvbri" runat="server" ControlToValidate="txtbirthday" ForeColor="red" ErrorMessage="輸入必須是日期" Operator="DataTypeCheck" Type="Date"></asp:CompareValidator> 18 <asp:RangeValidator ID="rvBrithday" runat="server" ControlToValidate="txtbirthday" MaximumValue="2012/12/31" MinimumValue="2012/1/1" ForeColor="Red" ErrorMessage="日期超出范圍"></asp:RangeValidator> 19 </li> 20 <li> 21 郵箱：    <asp:TextBox ID="txtem" runat="server" /> 22 <asp:RegularExpressionValidator ID="revEmail" runat="server" ErrorMessage="請(qǐng)輸入正確的E-mail地址！" ControlToValidate="txtem" ForeColor="Red" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator> 23 </li> 24 <li>性別： 25 <asp:RadioButtonList ID="RadioButtonList2" runat="server" RepeatDirection="Horizontal"> 26 <asp:ListItem Selected="True">男</asp:ListItem> 27 <asp:ListItem>女</asp:ListItem> 28 </asp:RadioButtonList> 29 </li> 30 <li> 31 愛(ài)好： 32 <asp:CheckBoxList ID="CheckBoxList2" runat="server" RepeatDirection="Horizontal"> 33 <asp:ListItem>睡覺(jué)</asp:ListItem> 34 <asp:ListItem>聊天</asp:ListItem> 35 <asp:ListItem>寫(xiě)代碼</asp:ListItem> 36 </asp:CheckBoxList> 37 </li> 38 <li> 39 省份： 40 <asp:DropDownList ID="DropDownList2" runat="server"> 41 <asp:ListItem >河南省</asp:ListItem> 42 <asp:ListItem >安徽省</asp:ListItem> 43 <asp:ListItem >河北省</asp:ListItem> 44 </asp:DropDownList> 45 </li> 46 <li> 47 <asp:Button ID="Button4" runat="server" Text="注冊(cè)" οnclick="Button4_Click" /> 48 <asp:Button ID="Button5" runat="server" Text="取消" /> 49 </li> 50 <li> 51 <asp:TextBox TextMode="MultiLine" ID="zhucetxt" runat="server" Height="44px" Width="378px"></asp:TextBox> 52 </li> 53 <li> 54 <asp:ValidationSummary ID="ValidationSummary1" runat="server" /> 55 </li> 56 </ul> 57 </div> 58 </asp:Panel>

后臺(tái)代碼：

View Code 1 protected void Button4_Click(object sender, EventArgs e) 2 { 3 string name = txtname.Text; 4 string pass = txtpass.Text; 5 string repass = txtrepass.Text; 6 string birthday = txtbirthday.Text; 7 if (repass != pass) 8 { 9 Response.Write("<script>alert('密碼必須相同！')</script>"); 10 } 11 string sex=RadioButtonList2.SelectedItem.Value; 12 string str = ""; 13 foreach(ListItem item in CheckBoxList2.Items) 14 { 15 if(item.Selected) 16 { 17 str+=item.Value; 18 } 19 } 20 string like = str; 21 string pro = DropDownList2.SelectedItem.Value; 22 zhucetxt.Text = "姓名：" + name + ""+ "密碼：" + pass + "" +"生日："+birthday + "性別：" + sex + ""+ "愛(ài)好：" + like + ""+ "省份：" + pro; 23 }

??1）RequiredFiledValidator控件:用于驗(yàn)證必填字段中是否輸入了值。

用戶名：  <asp:TextBox? ID="txtname" runat="server"/>
<asp:RequiredFieldValidator ID="rfvname" runat="server" ErrorMessage="用戶名不能為空" ForeColor="red"ControlToValidate="txtname"/>???????????????

<asp:CustomValidator ID="CustomValidator1" runat="server"? ControlToValidate="txtname" ForeColor="Red" ErrorMessage="必須包含a" onservervalidate="CustomValidator1_ServerValidate"></asp:CustomValidator>?????????????

?2）CompareValidator控件：將用戶輸入的值和另一個(gè)控件值進(jìn)行比較，或固定值比較。

確認(rèn)密碼：  <asp:TextBox ID="txtrepass" runat="server"/>

?<asp:CompareValidator ID="cvpwd" runat="server" ControlToCompare="txtpass"ForeColor="red"ControlToValidate="txtrepass"?? ErrorMessage="確認(rèn)密碼和密碼必須相同"/>???????

3）RangeValidator控件：驗(yàn)證用戶輸入的值是否在指定范圍

? 出生日期：   <asp:TextBox ID="txtbirthday" runat="server" />
?<asp:CompareValidator ID="cvbri" runat="server"? ControlToValidate="txtbirthday" ForeColor="red" ErrorMessage="輸入必須是日期" Operator="DataTypeCheck" Type="Date"/>?

<asp:RangeValidator ID="rvBrithday" runat="server" ControlToValidate="txtbirthday" MaximumValue="2012/12/31" MinimumValue="2012/1/1" ForeColor="Red" ErrorMessage="日期超出范圍"/>

4）RegularExpressionValidator控件：驗(yàn)證輸入的值是否與正則表達(dá)式匹配

?郵箱：    <asp:TextBox ID="txtem" runat="server" />
?<asp:RegularExpressionValidator ID="revEmail" runat="server"? ErrorMessage="請(qǐng)輸入正確的E-mail地址！" ControlToValidate="txtem" ForeColor="Red"? ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"/>

5）CustomValidator控件：用于創(chuàng)建自定義驗(yàn)證?????

用戶名???? <asp:TextBox? ID="txtname" runat="server"/>
?<asp:CustomValidator ID="CustomValidator1" runat="server"? ControlToValidate="txtname" ForeColor="Red" ErrorMessage="必須包含? ?a" onservervalidate="CustomValidator1_ServerValidate"/>????

CustomValidator1_ServerValidate事件：

protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
??????? {
??????????? args.IsValid = args.Value.Contains("a");
??????? }

6）ValidationSummar控件：用于概括所有錯(cuò)誤提示

? <asp:ValidationSummary ID="ValidationSummary1" runat="server" />

==》滿足所有條件，運(yùn)行正確結(jié)果：

?自定義控件：

常見(jiàn)自定義服務(wù)器控件分4種：復(fù)合控件，驗(yàn)證控件，模板控件和數(shù)據(jù)綁定控件

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