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  1. #1
    SitePoint Enthusiast
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    Onclient and OnClientClickt events not working friendly...help needed...thanks

    Howdy folks,

    I tried whole day...but couldn't figure this out.

    There is a <asp> button control. When it is clicked, I have two handlers on it. One is client side and other is server side.

    I want the client side (javascript) to be fired before the server side code is fired. So I made the client side javascript code to return false on a conditional statement and return true if the condition is successfull. From my samples, I learnt that if the javascript funtion returns false the server side code doesn't get fired. But, for some reason, it doesn't behave like that. So I had to use UseSubmitBehaviour='false" on the button control. This way, the server side event is not getting fired. But I want the server side event to get fired when the client side script returns false. How can i do this? I tired whole day...any help is greatly appreciated.

    Code:
    <%@ Page Title="" Language="C#" MasterPageFile="~/QRMDMS.Master" trace="true" AutoEventWireup="true" CodeBehind="WebForm7.aspx.cs" Inherits="FHLBSF.QRMDMS.WebUI.WebForm7" %> 
    <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> 
    </asp:Content> 
    <asp:Content ID="Content2" ContentPlaceHolderID="MainContentPlaceHolder" runat="server"> 
     
    <div style="height: 25px"> 
     
    </div> 
     
    <div style="table-layout: fixed; width: 600px; height: 65px; position: fixed; z-index: auto;"> 
     
        <fieldset style="width: 382px; height: 47px;"> 
            <legend style="font-weight: bold">BS-IS Types</legend> 
            <asp:DropDownList ID="DropDownListBSISTypes" AutoPostBack="false" runat="server" 
                Height="23px" Width="362px"> 
             
             </asp:DropDownList> 
                
        </fieldset> 
         
        <asp:Button ID="ButtonAdd" UseSubmitBehavior="true" OnClick="ButtonAddClick" OnClientClick="return AddClientSide();" Text="Add" runat="server" /> 
        <asp:Button ID="ButtonEdit" runat="server" Text="Button" /> 
        <asp:Button ID="ButtonRemove" runat="server" Text="Remove" /> 
     
     <div> 
            <asp:Label ID="LabelBSISType" runat="server" Text="BS-IS Type"></asp:Label> 
            <asp:TextBox ID="TextBoxBSISType" runat="server" Width="282px"></asp:TextBox> 
        </div> 
     
      <script  type="text/javascript"> 
          function AddClientSide() { 
     
              alert("started the client side script"); 
     
              var varButtonAdd = document.getElementById("<%=ButtonAdd.ClientID%>"); 
     
              var varproperty = varButtonAdd.getAttribute("value"); 
     
              if (varproperty == "Save") { 
                  alert("button now is in save mode"); 
     
                  varButtonAdd.setAttribute("value", "Add"); 
                  return false; 
              } 
              else { 
                  alert("button now is in add mode"); 
                  varButtonAdd.setAttribute("value", "Save"); 
                 return true; 
              }      } 
     
    </script> 
    </asp:Content>
    Code:
    protected void ButtonAddClick(object sender, EventArgs e) 
            { 
     
                Loggers.AssemblyLogger.Debug("Button Add click"); 
     
                try 
                { 
                    string a = ""; 
                } 
                catch (Exception ex) 
                { 
                    Loggers.AssemblyLogger.Error(ex); 
                    throw; 
                } 
     
     
            }

  2. #2
    SitePoint Wizard webcosmo's Avatar
    Join Date
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    This might probably work, i havent tested though:

    OnClientClick="return !AddClientSide();"

  3. #3
    SitePoint Enthusiast
    Join Date
    Jan 2012
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    what does "!" mean in Javascript if you put it before a function?


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