AJAX :: Executing Code From Js Pagemethods?
Jul 15, 2010I wrote a code to call some event...
[Code]....
and
[Code]....
js calls this code and I get object reference not set to an instance of an object
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Server side code
Imports System.Data.SqlClient
Partial Class Administrator_Calendar
Inherits System.Web.UI.Page
Protected Sub BtnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnAdd.Click
Try
Dim dbobj As New db
Dim i As Integer = 0
Dim rdr As SqlDataReader = dbobj.selectQuery("select max(srno) from calendar")
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rdr.Read()
i = rdr.Item(0)
End If
rdr.Close()
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Catch ex As Exception
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End Class
HTML CODE
<%@ Page Language="VB" MasterPageFile="~/MasterPages/Admin_AftrLogin.master" AutoEventWireup="false"
CodeFile="Calendar.aspx.vb" Inherits="Administrator_Calendar" Title="Excel Crop Care Ltd. / Administration Section / Manage Calendar..." %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit.HTMLEditor"
TagPrefix="cc2" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" runat="Server">
<div>
<cc1:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0">
<cc1:TabPanel runat="server" HeaderText="Selected Dates" ID="TabPanel1">
<ContentTemplate>
<asp:GridView ID="Gridview1" runat="server" AutoGenerateColumns="False" DataKeyNames="srno"
DataSourceID="SqlDataSource1">
<Columns>
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" ShowInsertButton="True">
<ItemStyle Width="20%" />
</asp:CommandField>
<asp:BoundField DataField="srno" HeaderText="No." ReadOnly="True" SortExpression="srno">
<ItemStyle Width="10%" />
</asp:BoundField>
<asp:BoundField DataField="date" HeaderText="Date" SortExpression="date">
<ItemStyle Width="30%" />
</asp:BoundField>
<asp:BoundField DataField="description" HeaderText="Description" SortExpression="description" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DataConnectionString %>"
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</cc1:TabPanel>
<cc1:TabPanel ID="TabPanel2" runat="server" HeaderText="Add New">
<ContentTemplate>
<table>
<tr>
<td width="30%">
Date :
</td>
<td>
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<asp:ImageButton runat="Server" ID="Image1" ImageUrl="../Images/Calendar_scheduleHS.png"
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<cc1:TextBoxWatermarkExtender ID="Txt_dt_TextBoxWatermarkExtender" runat="server"
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<cc1:MaskedEditExtender ID="Txt_dt_MaskedEditExtender" runat="server" MaskType="Date"
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</td>
</tr>
<tr>
<td colspan="2">
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</td>
</tr>
<tr>
<td colspan="2">
<cc2:Editor ID="Editor1" runat="server" Height="350px" />
</td>
</tr>
<tr>
<td colspan="2" align="center">
<asp:Button ID="BtnAdd" runat="server" Text="Add" OnClick="BtnAdd_Click" Width="75px"
CssClass="btn" />
<asp:Button ID="Btn_Rem" runat="server" Text="Remove" OnClick="BtnAdd_Click" Width="75px"
CssClass="btn" />
</td>
</tr>
</table>
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>
</div>
</asp:Content>
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[Code]....
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[Code]....
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P.S:
the function on the server is defined on the default.aspx.cs file as follows:
[System.Web.Services.WebMethodAttribute(), System.Web.Script.Services.ScriptMethodAttribute()]
public static string[] Foo(string s);
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[Code]....
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[Code]....
<input id="offcheckcid" type="button" value="بررسی کلوب آی دی" onclick="CheckCloobID('offline');" style="color: Black;"/>
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var id;
var email;
var button;
id = $get("ctl00_ctl00_cph1_cph1_offcid");
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var price = $get("offcut");
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var total = $get("offtotal");
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ActivateButtons();
}
}
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[Code]....
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Aug 13, 2010[Code]....
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DataSet dsEx = new DataSet();
SqlCommand testcommand = new SqlCommand();
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rest of the code follows
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