javascript - 如何隐藏/取消隐藏表单？

Question

我正在玩 jquery 并制作了一个无需刷新页面即可提交信息的表单，但在我遵循的教程中，它必须首先显示一个供人们编辑的表单，但我想做的略有不同。

我想显示一个用户个人资料页面，然后在每个项目旁边有一个小编辑链接，如果他们单击编辑，则会出现一个文本字段。我相信我可以在不刷新的情况下提交表单，但是当单击“编辑”按钮而不刷新时如何显示表单？

知道如何实现这一点，甚至更好的是我应该寻找什么来学习如何做到这一点？我浏览了 jquery 网站上的示例项目，它们似乎都没有通过单击隐藏/取消隐藏。

Answer 1

不刷新页面就无法提交 HTML 表单。但是，JavaScript（以及扩展的 jQuery）可用于提交类似的 GET 或 POST 请求。您还可以使用 jQuery 的.append方法插入必要的标记以即时创建输入。jQuery 也可用于访问已输入到字段中的值（通常由 id 完成）。

我正在做的事情与您需要的相似：

（此特定代码从可见表单中获取一些输入，并将其聚合为不可见表单以供以后使用）

jQuery('#submitButton').click(function(){

  jQuery('#prev_request').append('<input type="hidden" name="sort_order" value="'+jQuery("input[@name=sort_order]:checked").val()+'" />');
  jQuery('#prev_request').append('<input type="hidden" name="sort_by" value="'+ jQuery("#sort_by option:selected").val() +'" />');


});

Answer 2

我认为最简单的事情是这样的：

HTML

<form id="form1" style="display: none;">
</form>
<a id="editButton" href="javascript:void(0)">Edit</a>
<a id="closeButton" href="javascript:void(0)" style="display: none;">Close</a>

JavaScript（一定要在你的页面上包含 jQuery）

$(function() {
    $("#editButton").click(function() {
        $("#form1").show();
        $("#editButton").hide();
        $("#closeButton").show();
    });

    $("#closeButton").click(function() {
        $("#form1").hide();
        $("#editButton").show();
        $("#closeButton").hide();
    });
});

It's also easy to add an expanding transition effect with the show() and hide() methods. Simply pass the desired transition duration to the function (in milliseconds) like this:

$("#form1").show(500);

Answer 3

Here is a quick example of how I'd handle the concept, I'd follow it up with posting and validation and all else a little server-side scripting etc, but this can act as your stepping stone overall. Pretty much all you got to remember is javascript/jquery is all smoke and mirrors since its all handled client-side you essentially need to work with what you have on screen be it hidden or otherwise. In this case you have 2 elements one showing by default while the other hides, you make a logic that hides one over the other when one is chosen, and do what you need to respectively with either.

<div id="wrapper">
   <div id="container">
      <div id="storedvalue"><span>Hello</span> [<a href="javascript:void(0);" id="editvalue">edit</a>]</div>
      <div id="altervalue" style="display:none;"><input type="text" name="changevalue" id="changevalue" value="Hello"> [<a href="javascript:void(0);" id="savevalue">save</a>]</div>
   </div>
</div>


<script type="text/javascript">
$('#editvalue').click(function(e){$('#storedvalue').hide();$('#altervalue').show();});
$('#savevalue').click(function(e){
   var showNew = $('#changevalue').val();
   $('#altervalue').hide();
   $('#storedvalue').show();
   $('#storedvalue span').text(showNew);
});
</script>

DEMO

Answer 4

Lostsoul,

I would utilize an asp DataGrid inside of an UpdatePanel control:

.ascx:

<asp:UpdatePanel ID="yourUPpanel" runat="server" UpdateMode="Conditional">
<ContentTemplate>
       <asp:DataGrid ID="yourDG" runat="server" AutoGenerateColumns="False" CellPadding="2" AllowSorting="False" AllowPaging="False" EnableViewState="false" onItemCommand="yourDG_CellClick">
          <FooterStyle CssClass="cssFooter"></FooterStyle>
          <AlternatingItemStyle CssClass="CssAltItem"></AlternatingItemStyle>
          <ItemStyle CssClass="cssGridItem"></ItemStyle>
          <HeaderStyle CssClass="GridHeader"></HeaderStyle>
       </asp:DataGrid>
       <asp:Panel ID="yourAdditionalStuff" runat="server" Visible="false">
         <table>
           <tr>
             <td>
               <asp:TextBox ID="yourTXT" runat="server" Width="100px"/>
             </td>
           </tr>
         </table>
       </asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>

.vb

Public Sub yourUPpanel_Load(ByVal sender As Object, ByVal e As EventArgs) Handles yourUPpanel.Load

        If cnADO Is Nothing Then blahblah.getConnection("yourserver", cnADO) 'whatever the case may be here
        Try

            Dim da As SqlDataAdapter

            Dim cmd3 As New SqlCommand
            cmd3.Connection = cnADO
            cmd3.CommandType = CommandType.StoredProcedure
            cmd3.CommandText = "SP to populate GRID"     'whatever the case may be here
            daPeople = New SqlClient.SqlDataAdapter
            daPeople.SelectCommand = cmd3

            If yourDG.Columns.Count <= 0 Then
                Dim btnc As New ButtonColumn
                btnc.ButtonType = ButtonColumnType.LinkButton
                btnc.HeaderText = "Edit"
                btnc.DataTextField = "primarykey"
                btnc.DataTextFormatString = "<img border='0' src=" & ResolveUrl("~/images/edit.gif") & ">"         'whatever the case may be here
                btnc.CommandName = "Edit"
                btnc.ItemStyle.HorizontalAlign = HorizontalAlign.Center
                yourDG.Columns.Add(btnc)

                Dim bc As New BoundColumn

                bc = New BoundColumn
                bc.DataField = "sqlColumnName"
                bc.HeaderText = "First"
                yourDG.Columns.Add(bc)

            End If

            Dim dt As New DataTable
            yourDG.Fill(dt)
            yourDG.DataSource = dt
            yourDG.DataBind()

            'lbtnEditAddPerson.Visible = True
        Catch ex As Exception

        Finally
            If Not cnADO Is Nothing Then
                If cnADO.State = ConnectionState.Open Then
                    cnADO.Close()
                End If
            End If
        End Try
    End Sub



 Protected Sub yourDG_CellClick(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs)

        Dim cmd As String = e.CommandName.ToString.ToUpper
        If cmd.ToUpper = "EDIT" Then
            Using cnADO As SqlConnection = New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("yourserver").ToString) 'whatever the case may be here
                Using scmd As New SqlCommand("", cnADO)
                    scmd.CommandText = "YOURTEXTHERE"

                    Using dr As SqlDataReader = scmd.ExecuteReader()
                        If dr.Read Then
                            'fill textbox for load
                        End If
                    End Using
                End Using
            End Using

            yourAdditionalStuff.Visible = True


        ElseIf cmd.ToUpper = "ANOTHERCOMMAND" Then 'if you want to...allows for extensibility (would need another column tho)

        End If
End Sub

Note that this is a framework, but should be very close to what you need (or at least give you things to search on). I've actually used this approach, so I can confirm that it does work. If you aren't using a database (i.e. if you won't need to save/load what the user puts in your appearing textbox) then it should simplify down. This should get you Googling though. Hope it helps!

-sf

EDIT: Per Chris' comment, I think:

function hideOnClick(){
  var d =  document.getElementById('<% =yourtextbox.ClientID %>');
  if(d.style.display == "none"){
     d.style.display = "inline";
  }else{
     d.style.display = "none";
  }
 }

might help you if all you need is the client-side javascript to toggle show/hide. All you'd need to do is attach it to your edit button.