Get Current Item of DataList using Jquery on Button click

<asp:DataList ID="dtListOtherItems" runat="server" ClientIDMode="Static" RepeatDirection="Horizontal" DataKeyField="Price" RepeatColumns="4" OnItemCommand="dtListOtherItems_ItemCommand" OnItemDataBound="dtListOtherItems_ItemDataBound">
<ItemTemplate>

<asp:ImageButton ID="imgCategory" runat="server" ImageUrl='<%#Bind("Image") %>' Height="100px" Width="100px" CommandName="Select" CommandArgument='<%#Bind("ProductID") %>' />&nbsp;<br />

<asp:Label ID="lblProductName" runat="server" CssClass="control-label" Text='<%#Bind("ProductName") %>' Width="120px"></asp:Label><br />
<label class="control-label">S :</label><asp:Label ID="lblQuantity" runat="server" CssClass="control-label" Text='<%#Bind("QtyInHand") %>'></asp:Label><br />
<asp:TextBox ID="txtOrderQty" runat="server" onblur="checkDec(this);" ClientIDMode="Static" CssClass="form-control" Width="50px" Height="20px" ></asp:TextBox>
<asp:Button ID="btnAdd" runat="server" ClientIDMode="Static" OnClientClick="btnClick(this);" />
</ItemTemplate>
</asp:DataList>

I need to change the txtOrderQty  textbox value when btnAdd click event using jquery