请帮我理解这一点。
我创建了一个 ListView，显示来自 SQL 数据库的数据。我已经启用了插入、编辑和删除功能，一切正常。
我想要什么？
我想用SweetAlert http://t4t5.github.io/sweetalert/提示用户确认yes/no他们是否想要从 ListView 中删除条目。
我做了什么？
First我尝试使用我添加的“内置”功能OnClientClick="return confirm('are you sure')" to the <asp:Button/>调用给定 ListView 条目的删除。成功了！当我单击“是”时，它删除了，“否”则没有。除了添加上述内容之外，我不需要做任何事情。But这不是我想要的。我想要鸽友SweetAlert显示出来，问题就开始了。
Second我以为我可以简单地创建SweetAlert脚本并从按钮调用其函数名称。但是，这样做时，它确实会打开SweetAlert但在我有机会单击“是”和“否”之前，它已经删除了该项目并关闭了该框。
<script>
function deletealert()
{
swal({
title: "Are you sure?",
text: "You will not be able to recover this imaginary file!",
type: "warning",
showCancelButton: true,
confirmButtonColor: "#DD6B55",
confirmButtonText: "Yes, delete it!",
cancelButtonText: "No, cancel plx!",
closeOnConfirm: false,
closeOnCancel: false
},
function (isConfirm) {
if (isConfirm) {
swal("Deleted!", "Your imaginary file has been deleted.", "success");
} else {
swal("Cancelled", "Your imaginary file is safe :)", "error");
}
});
}
</script>
现在我知道上面没有任何功能，但我什至没有机会转向是和否，它自行关闭了脚本。然后我发现我可以通过设置来停止删除CausesValidation=false关于删除<asp:Button />但后来什么也没发生。
Third我想我已经有了突破，但我不知道如何完成它。我发现在ListView上，有一个事件叫做项目删除。该事件在执行删除之前触发。我测试了一下，它有效。
protected void ListView1_ItemDeleting(object sender, ListViewDeleteEventArgs e)
{
ClientScript.RegisterStartupScript(GetType(), "hwa", "deletealert();", true); //Calls the sweetalert
e.Cancel = true;
//e.Cancel = false;
}
如果我使用e.Cancel = true;那么该项目不会被删除并且操作会被取消。如果我使用e.Cancel = false;然后该项目被删除。所以我想我可能必须将该功能与上面的 jQuery 结合起来。我不知道是否可以将 jQuery 放入受保护的 void 中并从那里使用它？
更新以包括haraman建议的解决方案这也是整个 .aspx 页面：
<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="forum-front.aspx.cs" Inherits="initial.site.forum_front" EnableViewState="true" EnableEventValidation="true" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css">
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="Content/sweetalert.min.js"></script>
<%--CSS Style Sheets--%>
<link href="Content/Styles.css" rel="stylesheet" />
<link href="Content/StylesPanel.css" rel="stylesheet" />
<link href="Content/sweetalert.css" rel="stylesheet" />
<%--Java Scripts--%>
<script>
function deletealert(ctl) {
// STORE HREF ATTRIBUTE OF LINK CTL (THIS) BUTTON
var defaultAction = $(ctl).prop("href");
// CANCEL DEFAULT LINK BEHAVIOUR
event.preventDefault();
swal({
title: "Are you sure?",
text: "You will not be able to recover this imaginary file!",
type: "warning",
showCancelButton: true,
confirmButtonColor: "#DD6B55",
confirmButtonText: "Yes, delete it!",
cancelButtonText: "No, cancel plx!",
closeOnConfirm: false,
closeOnCancel: false
}, function(isConfirm) {
if (isConfirm) {
swal("Deleted!", "Your imaginary file has been deleted.", "success");
// RESUME THE DEFAULT LINK ACTION
eval(defaultAction);
return true;
} else {
swal("Cancelled", "Your imaginary file is safe :)", "error");
return false;
}
});
}
</script>
<asp:Panel ID="Panel1" runat="server" Height="1401px">
<center>
<table>
<tr>
<td>
<asp:Button ID="TilForsiden" runat="server" OnClick="TilForsiden_Click" Text="Forsiden" CssClass="button" />
</td>
<td>
<asp:Panel ID="Panel2" runat="server" CssClass="panel panel-default">
<h1><asp:Label ID="ForumOverskrift" runat="server" CssClass=""></asp:Label></h1>
</asp:Panel>
</td>
</tr>
</table>
</center>
<center>
<asp:ListView ID="ListView1" runat="server" DataSourceID="SqlDataSource1" InsertItemPosition="LastItem" DataKeyNames="OpslagsID" OnDataBound="SkrivOpslag_Click">
<AlternatingItemTemplate>
<tr style="">
<td>
<asp:LinkButton OnClientClick="return deletealert(this);" ID="LinkButton1" runat="server" CommandName="Delete" Text="Slet" CssClass="btn btn-default btn-xs" Visible='<%# (string)Eval("BrugerNavn") == "testuser" ? true : false %>' />
<asp:Button ID="EditButton" runat="server" CommandName="Edit" Text="Rediger" CssClass="btn btn-default btn-xs" Visible='<%# (string)Eval("BrugerNavn") == "testuser" ? true : false %>' />
<asp:Button ID="AnswerButton" runat="server" CommandName="Answer" Text="Svar" CssClass="btn btn-default btn-xs" OnClick="AnswerButton_Click" />
</td>
<td>
<asp:Label ID="IndholdLabel" runat="server" Text='<%# Eval("Indhold") %>' />
</td>
<td>
<asp:Label ID="BrugerNavnLabel" runat="server" Text='<%# Eval("BrugerNavn") %>' />
</td>
<td>
<asp:Label ID="PostnummerLabel" runat="server" Text='<%# Eval("Postnummer") %>' />
</td>
<td>
<asp:Label ID="EmneLabel" runat="server" Text='<%# Eval("Emne") %>' />
</td>
</tr>
<tr>
<td></td>
<td>
<asp:TextBox ID="AnswerTextBox" Placeholder="Svar..." runat="server" CssClass="form-control" ToolTip="Skriv dit emne her" Width="500px" Visible="false" TextMode="MultiLine" Rows="3" />
</td>
</tr>
</AlternatingItemTemplate>
<EditItemTemplate>
<tr style="">
<td>
<asp:Button ID="UpdateButton" runat="server" CommandName="Update" Text="Update" CssClass="btn-info" />
<asp:Button ID="CancelButton" runat="server" CommandName="Cancel" Text="Cancel" CssClass="btn-default" />
</td>
<td>
<asp:TextBox ID="IndholdTextBox" runat="server" Text='<%# Bind("Indhold") %>' />
</td>
<td>
<asp:TextBox ID="EmneTextBox" runat="server" Text='<%# Bind("Emne") %>' />
</td>
</tr>
</EditItemTemplate>
<EmptyDataTemplate>
<table runat="server" style="">
<tr>
<td>No data was returned.</td>
</tr>
</table>
</EmptyDataTemplate>
<InsertItemTemplate>
<table>
<tr>
<td>
<asp:TextBox ID="EmneTextBox" Placeholder="Emne..." runat="server" Text='<%# Bind("Emne") %>' CssClass="form-control" ToolTip="Skriv dit emne her" Width="500px" />
</td>
</tr>
<tr>
<td>
<asp:TextBox ID="IndholdTextBox" Placeholder="Skriv her..." runat="server" Text='<%# Bind("Indhold") %>' CssClass="form-control" ToolTip="Skriv dit indhold her" TextMode="MultiLine" Rows="8" Width="500px" />
</td>
</tr>
</table>
<tr style="">
<td>
<asp:Button ID="InsertButton" runat="server" CommandName="Insert" Text="Udgiv" CssClass="btn-info" />
<asp:Button ID="CancelButton" runat="server" CommandName="Cancel" Text="Ryd" CssClass="btn-default" />
</td>
<td></td>
</tr>
</InsertItemTemplate>
<ItemTemplate>
<tr style="">
<td>
<asp:LinkButton OnClientClick="return deletealert(this);" ID="LinkButton2" runat="server" CommandName="Delete" Text="Slet" CssClass="btn btn-default btn-xs" Visible='<%# (string)Eval("BrugerNavn") == "testuser" ? true : false %>' />
<asp:Button ID="EditButton" runat="server" CommandName="Edit" Text="Edit" CssClass="btn btn-default btn-xs" Visible='<%# (string)Eval("BrugerNavn") == "testuser" ? true : false %>' />
<asp:Button ID="AnswerButton" runat="server" CommandName="Answer" Text="Svar" CssClass="btn btn-default btn-xs" OnClick="AnswerButton_Click" />
</td>
<td>
<asp:Label ID="IndholdLabel" runat="server" Text='<%# Eval("Indhold") %>' />
</td>
<td>
<asp:Label ID="BrugerNavnLabel" runat="server" Text='<%# Eval("BrugerNavn") %>' />
</td>
<td>
<asp:Label ID="PostnummerLabel" runat="server" Text='<%# Eval("Postnummer") %>' />
</td>
<td>
<asp:Label ID="EmneLabel" runat="server" Text='<%# Eval("Emne") %>' />
</td>
</tr>
<tr>
<td></td>
<td>
<asp:TextBox ID="AnswerTextBox" Placeholder="Svar..." runat="server" CssClass="form-control" ToolTip="Skriv dit emne her" Width="500px" Visible="false" TextMode="MultiLine" Rows="3" />
</td>
</tr>
</ItemTemplate>
<LayoutTemplate>
<table runat="server">
<tr runat="server">
<td runat="server">
<table id="itemPlaceholderContainer" runat="server" border="0" style="" class="table table-striped">
<tr runat="server" style="">
<th runat="server"></th>
<th runat="server">Indhold</th>
<th runat="server">BrugerNavn</th>
<th runat="server">Postnummer</th>
<th runat="server">Emne</th>
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</td>
</tr>
<tr>
<td>
<asp:Button ID="SkrivOpslag" runat="server" CommandName="SkrivOpslag" Text="Skriv Opslag" CssClass="btn btn-default btn-xs" OnClick="SkrivOpslag_Click" />
</td>
</tr>
<tr runat="server">
<td runat="server" style="">
<asp:DataPager ID="DataPager1" runat="server">
<Fields>
<asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="True" FirstPageText="Første Side" ShowLastPageButton="True" LastPageText="Sidste Side" PreviousPageText="Forrige" NextPageText="Næste" ButtonCssClass="btn btn-default" />
</Fields>
</asp:DataPager>
</td>
</tr>
</table>
</LayoutTemplate>
<SelectedItemTemplate>
<tr style="">
<td>
<asp:Button ID="DeleteButton" runat="server" CommandName="Delete" Text="Delete" CssClass="btn btn-default btn-xs" />
<asp:Button ID="EditButton" runat="server" CommandName="Edit" Text="Edit" CssClass="btn btn-default btn-xs" />
</td>
<td>
<asp:Label ID="IndholdLabel" runat="server" Text='<%# Eval("Indhold") %>' />
</td>
<td>
<asp:Label ID="BrugerNavnLabel" runat="server" Text='<%# Eval("BrugerNavn") %>' />
</td>
<td>
<asp:Label ID="PostnummerLabel" runat="server" Text='<%# Eval("Postnummer") %>' />
</td>
<td>
<asp:Label ID="EmneLabel" runat="server" Text='<%# Eval("Emne") %>' />
</td>
</tr>
</SelectedItemTemplate>
</asp:ListView>
</center>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" EnableViewState="True" ConnectionString="<%$ ConnectionStrings:foradbConnectionString %>" DeleteCommand="DELETE FROM [testOpslagstabel] WHERE [OpslagsID] = @OpslagsID" InsertCommand="INSERT INTO [testOpslagstabel] ([Indhold], [DatoTid], [Reference], [BrugerNavn], [Emne], [Postnummer]) VALUES (@Indhold, GetDate(), @Reference, 'testuser', @Emne, @Postnummer)"
SelectCommand="SELECT * FROM [testOpslagstabel] WHERE ([Postnummer] = @Postnummer)" UpdateCommand="UPDATE [testOpslagstabel] SET [Indhold] = @Indhold, [DatoTid] = @DatoTid, [Reference] = @Reference, [BrugerNavn] = 'testuser', [Postnummer] = @Postnummer, [Emne] = @Emne WHERE [OpslagsID] = @OpslagsID"
InsertCommandType="Text">
<DeleteParameters>
<asp:Parameter Name="OpslagsID" Type="Int32" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="Indhold" Type="String" />
<asp:Parameter Name="DatoTid" Type="DateTime" />
<asp:Parameter Name="Reference" Type="Int32" />
<asp:Parameter Name="BrugerNavn" Type="String" />
<asp:QueryStringParameter Name="Postnummer" QueryStringField="Postnummer" Type="Int32" />
<asp:Parameter Name="Emne" Type="String" />
</InsertParameters>
<SelectParameters>
<asp:QueryStringParameter Name="Postnummer" QueryStringField="Postnummer" Type="Int32" />
</SelectParameters>
<UpdateParameters>
<asp:Parameter Name="Indhold" Type="String" />
<asp:Parameter Name="DatoTid" Type="DateTime" />
<asp:Parameter Name="Reference" Type="Int32" />
<asp:Parameter Name="BrugerNavn" Type="String" />
<asp:QueryStringParameter Name="Postnummer" QueryStringField="Postnummer" Type="Int32" />
<asp:Parameter Name="Emne" Type="String" />
<asp:Parameter Name="OpslagsID" Type="Int32" />
</UpdateParameters>
</asp:SqlDataSource>
</asp:Panel>
</asp:Content>
为了让一切更清楚，我正在使用 aspx 后面的代码中的完整代码更新帖子。另外，如果它能让理解更好，我正在尝试创建一个论坛。
using System;
using System.Configuration;
using System.Data.SqlClient;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace initial.site
{
public partial class forum_front : System.Web.UI.Page
{
string qbynavn;
object objbynavn;
// Makes the SQL connection string
String CS = ConfigurationManager.ConnectionStrings["FORADB"].ConnectionString;
protected void Page_Load(object sender, EventArgs e)
{
string qpostnr = Request.QueryString["Postnummer"];
if (qpostnr != null)
{
try
{
using (SqlConnection con = new SqlConnection(CS))
{
// specifies the command to check for zipcode
SqlCommand cmd = new SqlCommand("SELECT Bynavn FROM Postnummertabel WHERE Postnr = " + qpostnr, con);
// Opens the connection
con.Open();
objbynavn = cmd.ExecuteScalar();
qbynavn = objbynavn.ToString();
ForumOverskrift.Text = " Velkommen til " + qbynavn;
}
}
catch (Exception ex)
{
Response.Write("Der opstod en fejl! " + ex.Message);
}
}
else
{
ForumOverskrift.Text = " Velkommen!";
}
}
public void AnswerButton_Click(object sender, EventArgs e)
{
// Tries to bind the sender to the right button.
Button originator = sender as Button;
// Checks if it has been found
if (originator != null)
{
// Goes throug the control hierachy to find the right item.
var parentItem = originator.Parent as ListViewItem;
if (parentItem != null
&& parentItem.ItemType == ListViewItemType.DataItem)
{
// Binds the textbox and button to variables
var textBox = parentItem.FindControl("AnswerTextBox") as TextBox;
var btn = parentItem.FindControl("AnswerButton") as Button;
if (textBox != null)
{
// Changes the textbox to being visible and changes the buttons text.
if (textBox.Visible == false)
{
textBox.Visible = true;
btn.Text = "Fortryd";
}
// Changes the textbox to invisible and changes the buttons text.
else if (textBox.Visible == true)
{
textBox.Visible = false;
btn.Text = "Svar";
}
}
}
}
}
// Makes the Skriv Opslag field either visible or invisible
protected void SkrivOpslag_Click(object sender, EventArgs e)
{
if (ListView1.InsertItem.Visible == true)
{
// Makes the Skriv Opslag field invisible
ListView1.InsertItem.Visible = false;
// Changes the buttons name to Skriv Opslag
Button btn = (Button) ListView1.FindControl("SkrivOpslag");
btn.Text = "Skriv Opslag";
}
else if (ListView1.InsertItem.Visible == false)
{
// Makes the Skriv Opslag field visible
ListView1.InsertItem.Visible = true;
// Changes the Buttons name to Skriv Opslag
Button btn = (Button)ListView1.FindControl("SkrivOpslag");
btn.Text = "Fortryd";
}
}
protected void TilForsiden_Click(object serder, EventArgs e)
{
Response.Redirect("~/welcomepage.aspx");
}
protected void ListView1_ItemDeleting(object sender, ListViewDeleteEventArgs e)
{
ClientScript.RegisterStartupScript(GetType(), "hwa", "deletealert();", true);
//e.Cancel = true;
//Response.Write("<script>deletealert();</script>");
//ScriptManager.RegisterClientScriptBlock(this, GetType(), "mykey", "deletealert();", true);
}
}
}
