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我在asp.net中使用模態彈出式擴展器來顯示模態彈出窗口。當我點擊目標按鈕模式彈出顯示成功，如果點擊取消按鈕它也會成功關閉。但我的問題是，當我點擊瀏覽器的後退按鈕再次模式彈出按鈕將顯示，但我不希望顯示模式彈出，請救我出這problem.Code的低於使用asp.net的模態彈出式擴展器
<asp:Button ID="Button1" runat="server" Text="Edit" CssClass="btndesign" Style="display: none" />
<asp:ModalPopupExtender ID="modalpopup" runat="server" TargetControlID="Button1" CancelControlID="cancel" PopupControlID="panel" BackgroundCssClass="modalBackground"></asp:ModalPopupExtender>
<asp:Panel ID="panel" runat="server" Style="background: linear-gradient(to top,#ffffff 0%, #f1f6f9 50%); width: 31%; display: none">
<asp:Button ID="cancel" runat="server" Text="X" Style="float: right; margin-top: 9px; margin-right: 3px; background: #ef5350; border-color: #ef5350; color: #fff; font-size: 11px; padding-top: 3px; padding-bottom: 3px;" />
<h4 style="text-align: left; background-color: #fff; padding: 2%; margin-top: 5px;">Business</h4>
<table>
<tbody>
<tr>
<td>EIN</td>
<td>
<asp:TextBox ID="editein" runat="server" MaxLength="9" ValidationGroup="editgroup" Style="margin-bottom: 10px;"></asp:TextBox>
<asp:FilteredTextBoxExtender ID="editfteein" runat="server" TargetControlID="editein" ValidChars=""></asp:FilteredTextBoxExtender>
<asp:RequiredFieldValidator ID="editrequired" runat="server" SetFocusOnError="true" ControlToValidate="editein" ErrorMessage="Please Enter EIN Number" Display="None" ValidationGroup="editgroup"></asp:RequiredFieldValidator>
<asp:ValidatorCalloutExtender ID="editvce" runat="server" TargetControlID="editrequired" PopupPosition="Right"></asp:ValidatorCalloutExtender>
<asp:RegularExpressionValidator ID="editexpression" runat="server" SetFocusOnError="true" ControlToValidate="editein" ErrorMessage="EIN Must be of 9 digits" ValidationExpression="^\d{9}$" ValidationGroup="editgroup"></asp:RegularExpressionValidator>
<asp:ValidatorCalloutExtender ID="editexpvce" runat="server" TargetControlID="editexpression" PopupPosition="Right"></asp:ValidatorCalloutExtender>
</td>
</tr>
<tr>
<td>Business Name</td>
<td>
<asp:TextBox ID="editname" runat="server" MaxLength="50" ValidationGroup="editgroup" Style="margin-bottom: 10px;"></asp:TextBox>
<asp:FilteredTextBoxExtender ID="editftebusinessname" runat="server" TargetControlID="editname" ValidChars="&#()' -" FilterType="LowercaseLetters,UppercaseLetters,Numbers,Custom"></asp:FilteredTextBoxExtender>
<asp:RequiredFieldValidator ID="editrfvbusinessname" runat="server" SetFocusOnError="true" ControlToValidate="editname" ErrorMessage="Please enter business name here" Display="None" ValidationGroup="editgroup"></asp:RequiredFieldValidator>
<asp:ValidatorCalloutExtender ID="editvcebusinessname" runat="server" TargetControlID="editrfvbusinessname" PopupPosition="Right"></asp:ValidatorCalloutExtender>
<asp:RegularExpressionValidator ID="editrevbusninessname" runat="server" SetFocusOnError="true" ControlToValidate="editname" ErrorMessage="Please enter valid business name" ValidationExpression="^[a-zA-Z0-9#&()'\s-]{4,75}$" Display="None" ValidationGroup="editgroup"></asp:RegularExpressionValidator>
<asp:ValidatorCalloutExtender ID="editvcerevbusninessname" runat="server" TargetControlID="editrevbusninessname" PopupPosition="Right"></asp:ValidatorCalloutExtender>
</td>
</tr>
<tr>
<td></td>
<td>
<asp:CheckBox ID="changeaddress" runat="server" Text="Address changed from last filing" Style="margin-bottom: 10px;" />
</td>
</tr>
<tr>
<td>Address Line</td>
<td>
<asp:TextBox ID="editaddress" runat="server" MaxLength="50" Style="margin-bottom: 10px;"></asp:TextBox>
<asp:FilteredTextBoxExtender ID="editfteaddress" runat="server" TargetControlID="editaddress" FilterType="LowercaseLetters,UppercaseLetters,Numbers,Custom" ValidChars=" -/"></asp:FilteredTextBoxExtender>
<asp:RequiredFieldValidator ID="editrfvaddress" runat="server" ControlToValidate="editaddress" SetFocusOnError="true" ErrorMessage="Please enter address" Display="None" ValidationGroup="editgroup"></asp:RequiredFieldValidator>
<asp:ValidatorCalloutExtender ID="editvceaddress" runat="server" TargetControlID="editrfvaddress" PopupPosition="Right"></asp:ValidatorCalloutExtender>
<asp:RegularExpressionValidator ID="editrevaddress" runat="server" ControlToValidate="editaddress" SetFocusOnError="true" ErrorMessage="Please enter valid address" Display="None" ValidationExpression="[A-Za-z0-9](?[A-Za-z0-9\-/])*" ValidationGroup="editgroup"></asp:RegularExpressionValidator>
<asp:ValidatorCalloutExtender ID="editrevvceaddress" runat="server" TargetControlID="editrevaddress" PopupPosition="Right"></asp:ValidatorCalloutExtender>
</td>
</tr>
<tr>
<td>Address Line 2</td>
<td>
<asp:TextBox ID="editadd2" runat="server" MaxLength="50" Style="margin-bottom: 10px;"></asp:TextBox>
<asp:FilteredTextBoxExtender ID="editfteaddress2" runat="server" TargetControlID="editadd2" FilterType="LowercaseLetters,UppercaseLetters,Numbers,Custom" ValidChars=" -/"></asp:FilteredTextBoxExtender>
</td>
</tr>
<tr>
<td>City</td>
<td>
<asp:TextBox ID="editcity" runat="server" MaxLength="30" Style="margin-bottom: 10px;"></asp:TextBox>
<asp:FilteredTextBoxExtender ID="editftecity" runat="server" TargetControlID="editcity" FilterType="LowercaseLetters,UppercaseLetters,Numbers,Custom" ValidChars=" "></asp:FilteredTextBoxExtender>
<asp:RequiredFieldValidator ID="editrfvcity" runat="server" ControlToValidate="editcity" ErrorMessage="Please enter city name" SetFocusOnError="true" ValidationGroup="editgroup" Display="None"></asp:RequiredFieldValidator>
<asp:ValidatorCalloutExtender ID="editvcecity" runat="server" TargetControlID="editrfvcity" PopupPosition="Right"></asp:ValidatorCalloutExtender>
</td>
</tr>
<tr>
<td>State</td>
<td>
<asp:TextBox ID="txtState" runat="server" CssClass="txtbox" ValidationGroup="BusinessDetails"
Visible="false" MaxLength="30"></asp:TextBox>
<asp:FilteredTextBoxExtender ID="fteState" runat="server" TargetControlID="txtState"
FilterType="LowercaseLetters,UppercaseLetters,Custom" ValidChars=" ">
</asp:FilteredTextBoxExtender>
<asp:RequiredFieldValidator ID="rfvState" runat="server" ControlToValidate="txtState"
ErrorMessage="Please enter your state here" Display="None" ValidationGroup="BusinessDetails">
</asp:RequiredFieldValidator>
<asp:ValidatorCalloutExtender ID="vce_rfvState" runat="server" PopupPosition="Right"
TargetControlID="rfvState" HighlightCssClass="errorField">
</asp:ValidatorCalloutExtender>
<asp:RegularExpressionValidator ID="revState" runat="server" ControlToValidate="txtState"
SetFocusOnError="True" Display="None" ErrorMessage="Please enter valid state name"
ValidationExpression="[A-Z,a-z ]{1,50}" ValidationGroup="BusinessDetails">
</asp:RegularExpressionValidator>
<asp:ValidatorCalloutExtender ID="vce_revState" runat="server" PopupPosition="Right"
TargetControlID="revState" HighlightCssClass="errorField">
</asp:ValidatorCalloutExtender>
<asp:DropDownList ID="ddlState" runat="server" CssClass="txtbox" Style="width: 300px">
</asp:DropDownList>
<asp:RequiredFieldValidator ID="rfvStateddl" runat="server" ControlToValidate="ddlState"
ErrorMessage="Please select state" InitialValue="0" Display="None" ValidationGroup="BusinessDetails">
</asp:RequiredFieldValidator>
<asp:ValidatorCalloutExtender ID="vce_rfvStateddl" runat="server" PopupPosition="Right"
TargetControlID="rfvStateddl" HighlightCssClass="errorField">
</asp:ValidatorCalloutExtender>
</td>
</tr>
<tr>
<td>Country</td>
<td>
<asp:DropDownList ID="editcontry" runat="server" CssClass="txtbox" Style="margin-bottom: 10px; width: 300px"
AutoPostBack="true" OnSelectedIndexChanged="ddlCountry_SelectedIndexChanged">
<asp:ListItem Text="United States of America" Value="US"></asp:ListItem>
<asp:ListItem Text="Canada" Value="CA"></asp:ListItem>
<asp:ListItem Text="Mexico" Value="MX"></asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td>Zip</td>
<td>
<asp:TextBox ID="txtZip" runat="server" CssClass="txtbox" ValidationGroup="BusinessDetails"
MaxLength="12"></asp:TextBox>
<asp:FilteredTextBoxExtender ID="fteZip" runat="server" TargetControlID="txtZip"
FilterType="LowercaseLetters,UppercaseLetters,Numbers,Custom" ValidChars=" "
Enabled="false">
</asp:FilteredTextBoxExtender>
<asp:FilteredTextBoxExtender ID="fteZipUS" runat="server" TargetControlID="txtZip"
FilterType="Numbers" Enabled="false">
</asp:FilteredTextBoxExtender>
<asp:RequiredFieldValidator ID="rfvZip" runat="server" ControlToValidate="txtZip"
ErrorMessage="Please enter your zip code here" Display="None" ValidationGroup="BusinessDetails">
</asp:RequiredFieldValidator>
<asp:ValidatorCalloutExtender ID="vce_rfvZip" runat="server" PopupPosition="Right"
TargetControlID="rfvZip" HighlightCssClass="errorField">
</asp:ValidatorCalloutExtender>
<asp:RegularExpressionValidator ID="revZip" runat="server" ControlToValidate="txtZip"
SetFocusOnError="True" Display="None" ErrorMessage="Please enter valid zip code"
ValidationExpression="[0-9]{5}(([0-9]{4}))?" ValidationGroup="BusinessDetails">
</asp:RegularExpressionValidator>
<asp:ValidatorCalloutExtender ID="vce_revZip" runat="server" PopupPosition="Right"
TargetControlID="revZip" HighlightCssClass="errorField">
</asp:ValidatorCalloutExtender>
</td>
</tr>
</tbody>
</table>
<div style="background: #5f9fa1; padding: 2%;">
<asp:CheckBox ID="updatemaster" runat="server" Text="Also Update Master Business Info" required=""></asp:CheckBox>
<asp:Button ID="updateprocess" runat="server" Text="Update & Process" />
</div>
</asp:Panel>
我試過，但沒有工作.........問題是，後面的代碼甚至不會運行時點擊後退按鈕，頁面從緩存中加載。如果最後一頁加載（回發或不）有一個彈出窗口，它會再次顯示該彈出窗口 –