javascript - 确认回发 OnClientClick 按钮 ASP.NET

Question

<asp:Button runat="server" ID="btnUserDelete" Text="Delete" CssClass="GreenLightButton"
                           OnClick="BtnUserDelete_Click"
                           OnClientClick="return UserDeleteConfirmation();" 
 meta:resourcekey="BtnUserDeleteResource1" />

我试过了：

function UserDeleteConfirmation() {
        if (confirm("Are you sure you want to delete this user?"))
            return true;
        else
            return false;
}

和

function UserDeleteConfirmation() {
    if (confirm("Are you sure you want to delete this user?")) {
            __doPostBack(btnUserDelete, '');
    }

    return false;
 }

而且它们都不起作用。

score 85 · Accepted Answer

试试这个：

<asp:Button runat="server" ID="btnUserDelete" Text="Delete" CssClass="GreenLightButton"
                       OnClick="BtnUserDelete_Click"
                       OnClientClick="if ( ! UserDeleteConfirmation()) return false;" 
 meta:resourcekey="BtnUserDeleteResource1" />

这样，“返回”仅在用户单击“取消”时执行，而不是在他单击“确定”时执行。

顺便说一句，您可以将 UserDeleteConfirmation 函数缩短为：

function UserDeleteConfirmation() {
    return confirm("Are you sure you want to delete this user?");
}

score 37 · Accepted Answer

这里有一些可行的解决方案，但我没有看到任何人解释这里实际发生的事情，所以即使这是 2 岁，我也会解释它。

您添加的 onclientclick javascript 没有任何“错误”。问题是 asp.net 将它添加到 onclick 的东西上，以便在你放在那里的任何代码运行之后运行。

例如这个 ASPX：

<asp:Button ID="btnDeny" runat="server" CommandName="Deny" Text="Mark 'Denied'" OnClientClick="return confirm('Are you sure?');" />

渲染时变成这个 HTML：

<input name="rgApplicants$ctl00$ctl02$ctl00$btnDeny" id="rgApplicants_ctl00_ctl02_ctl00_btnDeny" 
onclick="return confirm('Are you sure?');__doPostBack('rgApplicants$ctl00$ctl02$ctl00$btnDeny','')" type="button" value="Mark 'Denied'" abp="547">

如果您仔细观察，将永远无法到达 __doPostBack 内容，因为“确认”将始终在到达 __doPostBack 之前返回 true/false。

这就是为什么您需要确认仅返回 false 而在值为 true 时不返回的原因。从技术上讲，它返回 true 还是 false 都没有关系，这种情况下的任何返回都会产生阻止调用 __doPostBack 的效果，但是为了约定，我会保留它，以便它在 false 时返回 false 并且对 true 不执行任何操作.

score 15 · Accepted Answer

您可以像这样将上述答案放在一行中。而且你不需要编写函数。

    <asp:Button runat="server" ID="btnUserDelete" Text="Delete" CssClass="GreenLightButton"
         OnClick="BtnUserDelete_Click" meta:resourcekey="BtnUserDeleteResource1"
OnClientClick="if ( !confirm('Are you sure you want to delete this user?')) return false;"  />

score 12 · Accepted Answer

使用 jQuery UI 对话框：

脚本：

<link rel="stylesheet" href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css" />
<script src="http://code.jquery.com/jquery-1.8.3.js"></script>
<script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
<script>
 $(function () {

            $("#<%=btnUserDelete.ClientID%>").on("click", function (event) {
                event.preventDefault();
                $("#dialog-confirm").dialog({
                    resizable: false,
                    height: 140,
                    modal: true,
                    buttons: {
                        Ok: function () {
                            $(this).dialog("close");
                            __doPostBack($('#<%= btnUserDelete.ClientID %>').attr('name'), '');
                        },
                        Cancel: function () {
                            $(this).dialog("close");
                        }
                    }
                });
            });
 });
</script>

HTML：

<div id="dialog-confirm" style="display: none;" title="Confirm Delete">
    <p><span class="ui-icon ui-icon-alert" style="float: left; margin: 0 7px 20px 0;"></span>Are you sure you want to delete this user?</p>
</div>

score 5 · Accepted Answer

试试这个：

<asp:Button runat="server" ID="btnUserDelete" Text="Delete" CssClass="GreenLightButton" 
   onClientClick=" return confirm('Are you sure you want to delete this user?')" 
   OnClick="BtnUserDelete_Click"  meta:resourcekey="BtnUserDeleteResource1"  />

score 5 · Accepted Answer

代码是这样的：

在 Aspx 中：

<asp:Button ID="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" CausesValidation=true />

在 CS 中：

protected void Page_Load(object sender, System.EventArgs e)
{
     if (!IsPostBack)
     {
         btnSave.Attributes["Onclick"] = "return confirm('Do you really want to save?')";          
     }
}

protected void btnSave_Click(object sender, EventArgs e){
    Page.Validate();
    if (Page.IsValid)
    {
       //Update the database
         lblMessage.Text = "Saved Successfully";
    }
}

score 4 · Accepted Answer

试试这个： OnClientClick="return confirm('Are you sure ?');" 还设置：CausesValidation="False"

score 3 · Accepted Answer

试试这个：

<asp:Button runat="server" ID="btnDelete" Text="Delete"
   onClientClick="javascript:return confirm('Are you sure you want to delete this user?');" OnClick="BtnDelete_Click" />

score 1 · Accepted Answer

这是在确认之前进行客户端验证的简单方法。它利用内置的 ASP.NET 验证 javascript。

<script type="text/javascript">
    function validateAndConfirm() {
        Page_ClientValidate("GroupName");  //'GroupName' is the ValidationGroup
        if (Page_IsValid) {
            return confirm("Are you sure?");
        }
        return false;
    }
</script>

<asp:TextBox ID="IntegerTextBox" runat="server" Width="100px" MaxLength="6" />
<asp:RequiredFieldValidator ID="reqIntegerTextBox" runat="server" ErrorMessage="Required"
    ValidationGroup="GroupName"  ControlToValidate="IntegerTextBox" />
<asp:RangeValidator ID="rangeTextBox" runat="server" ErrorMessage="Invalid"
    ValidationGroup="GroupName" Type="Integer" ControlToValidate="IntegerTextBox" />
<asp:Button ID="SubmitButton" runat="server" Text="Submit"  ValidationGroup="GroupName"
    OnClick="SubmitButton_OnClick" OnClientClick="return validateAndConfirm();" />

来源：使用来自 Javascript 的 ASP.Net 验证器控件的客户端验证

score 0 · Accepted Answer

试试这个：

function Confirm() {
    var confirm_value = document.createElement("INPUT");
    confirm_value.type = "hidden";
    confirm_value.name = "confirm_value";

        if (confirm("Your asking")) {
            confirm_value.value = "Yes";
            document.forms[0].appendChild(confirm_value);
        }
    else {
        confirm_value.value = "No";
        document.forms[0].appendChild(confirm_value);
    }
}

在按钮调用功能中：

<asp:Button ID="btnReprocessar" runat="server" Text="Reprocessar" Height="20px" OnClick="btnReprocessar_Click" OnClientClick="Confirm()"/>

在类 .cs 调用方法中：

        protected void btnReprocessar_Click(object sender, EventArgs e)
    {
        string confirmValue = Request.Form["confirm_value"];
        if (confirmValue == "Yes")
        {

        }
    }

score 0 · Accepted Answer

我知道这是旧的，有很多答案，有些真的很复杂，可以快速和内联：

<asp:Button runat="server" ID="btnUserDelete" Text="Delete" CssClass="GreenLightButton" OnClick="BtnUserDelete_Click" OnClientClick="return confirm('Are you sure you want to delete this user?');" meta:resourcekey="BtnUserDeleteResource1" />

javascript - 确认回发 OnClientClick 按钮 ASP.NET

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