我在更新面板中保留了2个asp面板控件（带有文本框和按钮），这样我一次只能显示1个。当我点击按钮时，下一个asp面板应该可见，隐藏旧的asp面板。我无法弄清楚..这是代码......
<asp:UpdatePanel ID="updatepnlSSN" ChildrenAsTriggers="false" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel ID="pnlSSNLookup" runat="server" BackColor="#EEE6DF" BorderColor="#274F73"
BorderStyle="Outset">
<table>
<tr>
<td colspan="3">
<asp:Label ID="lblMsg" runat="server" ForeColor="#713C2C"></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblStudentID" runat="server" Text="State Student ID:" ForeColor="#274F73" ToolTip="State Student ID Label"></asp:Label>
</td
<td>
<asp:TextBox ID="txtStudentID" runat="server" ToolTip="Enter the student's state ID number" AccessKey="i" TabIndex="1"></asp:TextBox>
</td>
<td>
<asp:RegularExpressionValidator ID="valStudentID" runat="server" ControlToValidate="txtStudentID" ErrorMessage="Please enter numeric only" ValidationExpression="[0-9]+" ForeColor="#713C2C" Display="Dynamic">
</asp:RegularExpressionValidator>
<asp:RequiredFieldValidator ID="valStdntID" runat="server" ControlToValidate="txtStudentID" Display="Dynamic" ErrorMessage="Please enter a State Student ID" ForeColor="#713C2C"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblFName" runat="server" Text="Student Legal First Name:" ForeColor="#274F73" ToolTip="First Name Label"></asp:Label>
<td>
<td>
<asp:TextBox ID="txtFName" runat="server" AccessKey="f" TabIndex="2" ToolTip="Enter the Student's First Name"></asp:TextBox>
</td>
<td>
<asp:RequiredFieldValidator ID="valFirstName" runat="server" ControlToValidate="txtFName" Display="Dynamic" ErrorMessage="Please enter the student's first name." ForeColor="#713C2C"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblDOB" runat="server" ForeColor="#274F73" Text="Student Date of Birth </br> (mm/dd/yyyy)" ToolTip="STudent's date of birth label"></asp:Label>
</td>
<td>
<div style="position: relative;">
<asp:TextBox ID="txtDOB" runat="server" AccessKey="d" TabIndex="3" ToolTip="Enter the student's date of birth"></asp:TextBox>
<cc1:CalendarExtender ID="txtDOB_CalendarExtender" runat="server" Enabled="True" TargetControlID="txtDOB" PopupPosition="Right" Format="MM/dd/yyyy">
</cc1:CalendarExtender>
</div>
</td>
<td>
<asp:RangeValidator ID="RangeValidator1" runat="server" ControlToValidate="txtDOB" ErrorMessage="Please enter a valid date: mm/dd/yyyy" ForeColor="#713C2C" MaximumValue="01/01/2075" MinimumValue="01/01/1970" Type="Date" Display="Dynamic"></asp:RangeValidator>
<asp:RequiredFieldValidator ID="valStudentDOB" runat="server" ControlToValidate="txtDOB" Display="Dynamic" ErrorMessage="Please enter the student's date of birth" ForeColor="#713C2C"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td>
<asp:Button ID="btnSearchSSN" runat="server" Text="Search" AccessKey="s" TabIndex="4" ToolTip="Begin student search" />
</td>
</tr>
</table>
</asp:Panel>
</td> </tr>
<tr>
<td>
</td>
</tr>
<tr>
<td style="padding: 0 10px 0 10px">
<asp:Panel ID="pnlSSNEntry" runat="server" BackColor="#EEE6DF" BorderColor="#274F73" BorderStyle="Outset" Visible="False" Height="110px">
<table align="left">
<tr>
<td colspan="3">
<asp:Label ID="lblSSnText" runat="server" ForeColor="#274F73" Text="Please enter the SSN for: "></asp:Label>
<asp:Label ID="lblSSNName" runat="server" ForeColor="#274F73"></asp:Label>
</td>
</tr>
<tr>
<td colspan="3">
<asp:Label ID="lblSSNSubmitMsg" runat="server" ForeColor="#713C2C"></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblSSN0" runat="server" ForeColor="#274F73" Text="Social Security Number: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtArea" runat="server" AccessKey="a" MaxLength="3" TabIndex="5" ToolTip="Enter the student's SSN area number" Width="29px"></asp:TextBox>
<asp:TextBox ID="txtGroup" runat="server" AccessKey="g" MaxLength="2" TabIndex="6" ToolTip="Enter the student's SSN group number" Width="22px"></asp:TextBox>
<asp:TextBox ID="txtSerial" runat="server" AccessKey="r" MaxLength="4" TabIndex="7" ToolTip="Enter the student's SSN serial number" Width="35px"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblSSNError" runat="server" ForeColor="#713C2C" Text="Please enter a valid Social Security Number" Visible="False"></asp:Label>
</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td>
<asp:Button ID="btnSSN" runat="server" Text="Submit SSN" AccessKey="n" TabIndex="8" ToolTip="Submit the student's SSN" />
</td>
</tr>
</table>
</asp:Panel>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnSearchSSN" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="btnSSN" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
答案 0 :(得分：0)
最好在UpdatePanel中使用MultiView并根据按钮点击设置ActiveView。这是tutorial
简而言之，MultiView是面板的包装。它包含可以激活的View对象的集合。在任何给定时间只能看到一个视图。
答案 1 :(得分：0)
使用ASP:MultiView会不会更好。然后，您一次显示一个视图，它带有与之关联的互斥绑定。
<asp:MultiView>
<asp:View>
View 1
</asp:View>
<asp:View>
View 2
</asp:View>
</asp:MultiView>
答案 2 :(得分：0)
上面的答案提出了解决上述问题的一种很好的方法，但是如果你真的想这样做，那就试着在按钮点击事件上添加代码，比如
protected void btnSearchSSN_Click(object sender, EventArgs e)
{
pnlSSNLookup.Visible = false;
this.pnlSSNEntry.Visible = true;
}
protected void btnSSN_Click(object sender, EventArgs e)
{
pnlSSNEntry.Visible = false;
this.pnlSSNLookup.Visible = true;
}
希望它能为您提供所需的结果。