'generate onclick event in image control in asp.net

i am have one datalist in asp.net

i m using vb with asp

now my code is just as follow

<table border="0" cellpadding="0" cellspacing="0" >


<tr>

    <br />

   <td>

   Question Number:

        <asp:Label ID="Label3" runat="server" Text='<%# Eval("Question_no") %>' />

        <br />

   Cust_id:

        <asp:Label ID="Cust_idLabel" runat="server" Text='<%# Eval("Cust_id") %>' />

        <br />

        Question:

        <asp:Label ID="Label1" runat="server" Text='<%# Eval("Question") %>' />

        <br />

        Time:

        <asp:Label ID="Label2" runat="server" Text='<%# Eval("Date_time") %>' />

        <asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/ImagesFolde/Chrysanthemum.jpg" Height="50" Width="50" **OnClientClick="s()"**/>

all this in datalist as you can see

so it will be repeated..

i have put one image in it

now i want call a method when any image will be clicked

i make one sub called s() in vb

i want to call it

i use on clientclick() event but doesn't work

what to do?

asp.nethtmlvb.net


Solution 1:[1]

you use onclientclick - have you made your functions with javascript/jquery ? ( the server side won't be fired)

for instance : if you call you client method like this :

OnClientClick="return myFunction();"

then your function should be in the header as follows:

<script type=text/javascript>
   function myFunction()
   {
       alert("activated here");
   }
</script>

Solution 2:[2]

Suppose you have a datalist:

ASPX: 

<asp:DataList id="ItemsList" OnItemCommand="Item_Command" runat="server">
   <ItemTemplate>
      <asp:LinkButton id="SelectButton" Text="Select" CommandName="ModifyRow" 
      runat="server" CommandArgument='<%#Eval("Id")%>' />
   </ItemTemplate>
  </asp:DataList>

VB (Code Behind) : Here I am taking the id from '<%#Eval("Id")%>' and binding some products in bulleted list:

Protected Sub ItemsList_ItemCommand _
    (source As Object, e As RepeaterCommandEventArgs) _
    Handles Categories.ItemCommand
    If e.CommandName = "ModifyRow" Then
        ' Determine the CategoryID
        Dim categoryID As Integer = Convert.ToInt32(e.CommandArgument)
        ' Get the associated products from the ProudctsBLL and
        ' bind them to the BulletedList
        Dim products As BulletedList = _
            CType(e.Item.FindControl("ProductsInCategory"), BulletedList)
        Dim productsAPI As New ProductsBLL()
        products.DataSource = productsAPI.GetProductsByCategoryID(categoryID)
        products.DataBind()
    End If
End Sub

Solution 3:[3]

<asp:ImageButton  ID="imgexpand" runat="server" ImageAlign="Bottom" ImageUrl="~/img/plus.png" OnClick="s" />

you do not need the () in the control onclick statement this will fire the sub s() procedure in the vb code

Sources

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Source: Stack Overflow

Solution Source
Solution 1
Solution 2
Solution 3 TheConstructor

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