DataSource Controls :: Implementation Of A Find Method To Get Data From The Database
Mar 8, 2010I'm using Postgresql/Npgsql in my asp.net application, so I can't use LINQ to SQL. I implemented the following method of User class:
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here's my edit function
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I used the method "ModeChanged" to select the current product category like this:
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Forms Data Controls :: ObjectDataScource Not Working / ObjectDataSource1' Could Not Find A Non-generic Method?
Jan 8, 2010Most likely the later, I think. In my page I have a GridView, DatailsView, and the ODS. None of my commands work. For the Udate command I get a an error "ObjectDataSource 'ObjectDataSource1' could not find a non-generic method 'UpdateVirtual' that has parameters: name, notes, active, original_ident." For the Delete command I get "ObjectDataSource 'ObjectDataSource1' could not find a non-generic method 'DeleteVirtual' that has parameters: ident, original_ident." Yet the Insert command in the DetailsView works fine. Originally I've copied a file that performs virtually identical task, the only difference is a different database and the Select command. I had the Delete command working for for while but that one too broke. Can someone point out what I'm doing wring?
Below is the code:
The *.aspx file:
<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true"
CodeFile="Maintain_Virtual_Users.aspx.cs" Inherits="Maintain_Virtual_Users" Title="Maintain Accounts" StylesheetTheme="Master" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<h2>
Maintain Virtual Users</h2>
<p>
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" DataKeyNames="ident"
DataSourceID="ObjectDataSource1" AutoGenerateDeleteButton="false"
AutoGenerateEditButton="False">
<Columns>
<asp:BoundField DataField="ident" HeaderText="ident" SortExpression="ident"
ReadOnly="True" />
<asp:BoundField DataField="name" HeaderText="name" SortExpression="name" />
<asp:BoundField DataField="notes" HeaderText="notes" SortExpression="notes" />
<asp:CheckBoxField DataField="active" HeaderText="active"
SortExpression="active" />
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
</Columns>
</asp:GridView>
</p>
<p>
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataKeyNames="ident"
DataSourceID="ObjectDataSource1" Height="50px" Width="393px"
DefaultMode="Insert" AutoGenerateInsertButton="False">
<Fields>
<asp:BoundField DataField="ident" HeaderText="ident" ControlStyle-Width="250"
SortExpression="ident" ReadOnly="True" >
</asp:BoundField>
<asp:BoundField DataField="name" HeaderText="name" SortExpression="name" />
<asp:BoundField DataField="notes" HeaderText="notes" SortExpression="notes" />
<asp:CheckBoxField DataField="active" HeaderText="active"
SortExpression="active" />
<asp:CommandField ShowInsertButton="True" />
</Fields>
</asp:DetailsView>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
DeleteMethod="DeleteVirtual" InsertMethod="AddVirtual"
OldValuesParameterFormatString="original_{0}" SelectMethod="GetVirtual"
TypeName="VirtualPeopleBLL" UpdateMethod="UpdateVirtual">
<DeleteParameters>
<asp:Parameter Name="ident" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="ident" Type="Int32" />
<asp:Parameter Name="name" Type="String" />
<asp:Parameter Name="notes" Type="String" />
<asp:Parameter Name="active" Type="Boolean" />
</UpdateParameters>
<InsertParameters>
<asp:Parameter Name="ident" Type="Int32" />
<asp:Parameter Name="name" Type="String" />
<asp:Parameter Name="notes" Type="String" />
<asp:Parameter Name="active" Type="Boolean" />
</InsertParameters>
</asp:ObjectDataSource>
</p>
</asp:Content>
the .BLL:
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.ComponentModel;
using dsVirtualPeopleTableAdapters;
[System.ComponentModel.DataObject]
public class VirtualPeopleBLL
{
private VirtualPeopleTableAdapter _virtualPeopleAdapter = null;
protected VirtualPeopleTableAdapter Adapter
{
get
{
if (_virtualPeopleAdapter == null)
_virtualPeopleAdapter = new VirtualPeopleTableAdapter();
return _virtualPeopleAdapter;
}
Data Controls :: Find Control Method In Details View Returns Null
Nov 29, 2013I have detailsview control with bound fields...some using Templatefields. I am trying to access values in those fields but i get nulls....i really dont know why..I am proving all my code....
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Projects.aspx.vb" Inherits="Projects" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Projects Statuses</title>
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I guess something might be getting messy with the mode changing event... a postback? But if i remove the databinding code, i get an error! why find control returns null??
DataSource Controls :: Implementing A BLL / Contacts Table, The Select Method Is A Sql Query Against A Sql Server 2000 Database?
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The BLL method is built like so
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When using the BLL method to a gridview, the results of the subquery are not displayed. There are also other methods, each having a different where clause for ContactRole_ID and each is having the same issue of not displaying the subquery reult in the gridview. No error, but no data is displayed for the subquery either. Here is the templatefield of the gridview
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Another item that is causing an error is in trying to update a record. Here is the DAL update method
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And the BLL update method
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The error says i have extra parameters, but have no clue where the extra parameters are being picked up. The error isObjectDataSource 'odsContacts' could not find a non-generic method 'UpdateContact' that has parameters: _ContactID, _Active, _ContactName, _Office, _VirtualOffice, _Pager, _Fax, _Home, _Cellular, _Email, _ContactRole_ID, Active, ContactRole_ID, ContactName, Office, Email, VirtualOffice, Pager, FAX, Home, Cellular.And the objectdatasource
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Protected Sub MasterDataSource_Updating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ObjectDataSourceMethodEventArgs) Handles MasterDataSource.Updating
Dim entity As New Login()
Dim accountControl As AccountInfo = TryCast(Session("AccountCtrl"), AccountInfo)
entity = accountControl.Entity
e.InputParameters.Add("entity", entity)
End Sub
And here's the markup for the datasource:
<asp:ObjectDataSource ID="MasterDataSource" runat="server" EnableCaching="true" CacheDuration="10"
SelectMethod="SelectAll" UpdateMethod="Update" TypeName="Data.DAL.LoginDAL">
</asp:ObjectDataSource>
My question is, how can I get the update method to pass this entity to the update method in my BLL class? It seems the Update method requires an ID or reference to the original object to use in determining whether any changes have taken place, but I don't really want to do this. In other words, I just want to use the Update event on my ObjectDataSource to pass my entity to the method ("Update") I set as a property and then let this business method handle the update of the data. Shown below, is the BLL update method I want to call:
Public Overloads Function Update(ByVal entity As Login)
If entity Is Nothing Then
Throw New ArgumentNullException("entity")
End If
MyBase.Update("UpdateLogin", entity.Username, entity.Password, entity.FirstName, entity.LastName, entity.Role, entity.Region, _
entity.Email, entity.Title, entity.TierID, entity.Street, entity.City, entity.State, entity.Zip, entity.Mobile, entity.Phone, entity.Fax)
End Function
When I try to call this as it stands now, I get an error: ObjectDataSource 'MasterDataSource' could not find a non-generic method 'Update' that has parameters: ID, entity. Previously, I'd set up a long list of parameters of basic data types (string, int, boolean), but this is rather cumbersome and I was hoping to use an entity for this (FYI, I also got the same type of error when I tried this approach, but with the ID as the
last parameter in the list). Perhaps what I'm doing here is atypical to how the ODS is normally used?? Has anyone done something like this successfully?
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Follwing code
Jquery
<script type="text/javascript">
$(function () {
$("[id*=btnSubmit]").bind("click", function () {
var Customer = {};
[code]....
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DataSource Controls :: How To Execute Object Data Source Method On Postback Only
Aug 10, 2010When my page is first loaded i receive error message stating to the effect
cant find Email for GetInvoicesByVendor.
this refers to a function in another class file:
Public Shared Function GetInvoicesByVendor(ByVal Email As String, ByVal vendorid As Integer) _
As IEnumerable
yet i only want to execute this function during the button click event and not when page is first loaded with the following parameters:
vendorid.Text = 1
txtcustomerid.Text = test@yahoo.co.uk
My objectdatasource is declared as follows:
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
OldValuesParameterFormatString="original_{0}"
SelectMethod="GetInvoicesByVendor" TypeName="InvoiceDB">
<SelectParameters>
<asp:ControlParameter ControlID="txtcustomerid" Name="Email"
PropertyName="Text" Type="String" />
<asp:ControlParameter ControlID="vendorid" Name="vendorid" PropertyName="Text"
Type="Int32" />
</SelectParameters>
</asp:ObjectDataSource>
