I am using VB.Net 2010, and when I run the following code, I get System.Data.DataViewManagerListItemTypeDescriptor displaying in the dropdownlist box
cmbProdType.DataSource = ds
cmbProdType.DisplayMember = "ProductType"
cmbProdType.ValueMember = "ProductCode"
When I hover over the datasource, I can see the correct records. But its not displaying in the dropdownlist control.
How to query a record in vb.net using combo or textbox via linq to sql like the search engine? Just like when you search in google or youtube, once you typed in the initial string on the textbox or combo box it will show a drop-down list. I tried to use it in my application using linq method but the problem is it would duplicate on the first string that you entered on the dropdownlist if that record exist on your database after you press the space key. I used the code below which duplicates the records on the drop-down list when you type in your string after the space key.
I just want it to be like in any search engine that when you type in the string or your initial string, it will display on the drop-down list all the records from the database that contains the string you entered without duplication. In my case, I'm trying to query a name from my database. This is how it should work, For example, if you type an initial string in the textbox or combo box a named 'Mark', it should display all the names from the database containing 'Mark' into the drop-down list before it changes into its final string that you entered.
Here is the codes I used:
Private Sub ComboBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles
ComboBox1.TextChanged
Dim db As New MultipleDatabaseOperationDataContext
Dim search As String
search = ComboBox1.Text
[Code] .....
Im using Visual Studio 2008 (ASP.net) to build some web pages..
I have a DropDownList linked to a DataSource from data base to fill it automaticly, and it works perfect, but I want to modify the items before its displayed ?
I am a newbie to the .net developing world. i want to display a set of records on my asp.net page.
On a grid control (gridview, repeater etc), I want to display the list of sales people and the clients that they represent. This is how it needs to look on my asp page:
Employee ID: 123456
Name: John
Last Name: Smith
Email: johnsmith@abc.com
Phone: 201-123-4567
[Code]...
I'm trying to use listview control in vb.net or vb2008 express edition to display records from my database after it is being queried.I have two column headers in my listview control which are named Account# and Authorized Users. I was able to display the records from the database into the listview control but i don't know how to arrange it in a proper column where it should be displayed cause what happen is all records are being combined in one column which other records should be aligned to the other column.What I want is to display the account numbers in aligned with the Account# column header and the names should be aligned in Authorized Users column header. Here's the codes I used:
[Code]...
I want to search the records from the textbox and display the records to the datagridview, if there are no records, just display empty on the datagridview.
this is not working:
Dim sqlsearch As String
sqlsearch = "SELECT * FROM setting WHERE mname LIKE '%" & TextBox.Text
[code].....
i'm using string builder for generating Passenger List in which i have used a tables i want to add dropdownlist into this Passenger . what i did is i have taken one main table --
strHTML1.Append("<table align=center cellpadding='0' cellspacing='0' width='100%'>");
strHTML1.Append("<tr>");
strHTML1.Append("<td>");
strHTML1.Append("Passenger");
[code]....
the prob is it is not show the dropdownlist when i run the project.
I want to search the records from the textbox and display the records to the datagridview, if there are no records, just display empty on the datagridview.[code]
View 8 Repliesadding and updating records from VB to MS Access.
code is as follow:
Private
Sub btnNSubmit_Click(ByVal
sender As System.Object,
ByVal e
[code]....
When I modify and delete data in a DataGridView, I get the error:
The record cannot be deleted or changed because table 'Table Name' includes related records.
but I can add new data, only cannot modify and delete data.
I have a blank form, and I've added a really simple Access database with two tables with two columns each. If I click and drag the name of one of the columns, and drop it on the form, I get a label and a textbox.
I was assuming that since the load procedure already had Me.WhateverTableAdapter.Fill in there, that when I pressed the green arrow to run the program, I'd be able to flip through the records in the column.
When I click "preview data", I do see the data is there, but when I run the program, it says 0 records and none load. Is there something else I have to do to be able to flip through the records in that one text box?
In my application, I open a "Customer Details" form and on confirming I have to delete all records from other 2 tables (Order & OrderDetails) of the database. I am not able to delete records. It somehow stops by on - ordDetAdap.Update(ordDetDs) . The code is as follows :
[Code]...
There may be N number of Orders and each order may have N number of OrderRedetails. There are rows and also shows proper data in MsgBox, also row.Delete works fine, BUT why does it stop at Update(OrdDetDs) I can't make out. Any idea where am I going wrong.
Also Is their any easy way out to delete all records using just a single statement providing OrderId from OrderDetails table ? As of there are 10 rows of a single order, then For loop will iterate 10 times and delete 10 rows, instead if I can delete all 10 rows at once would be beneficial.
I have a program which I am converting from VB6 to VB2010 this is also my first venture into sql. I have read many of the examples to try to get to grips with deleting records including those in this forum by imcilhinney
My problem is that I want to delete all but one of the records when the user presses a button, everything goes well until the 'ExecuteNonQuery' is reached.
[Code]...
Dear Friends I have Developed a Successful Database Software, it include Datagrid, First, Last, Next, Previous, Add, Delete, Edit, Update, Search just Every Thing is Working Nice, But I need help from one of expert from you. my problem is that every time when i Start program its all functions are workin including edit and delete. (mean data (rows) Added at previous run is able to be Delted at current time) but when i add new record at current run time it adds succesfully, but while at same run time session (current) i tries to Delete or edit new added roecord it is not working, in simple words new added records are not able to delete and edit at same run session. i m including project's zip file and plz try to run it and add new record, after adding record at same time try to edit or Delete new added record.
View 3 RepliesI am a Visual Basic Programmer and presently migrating our applications to Vb.netQuestion : I need to access the records from a MS Access database to the Text box or for some user login validation using vb.netso i coded to give a message box if any row is returned by the connection.but its not all selecting any rows even though i queried as "Select * from <Table Name>"also i am unable to debug it.....I am attaching th code snippet used along with this mail.plz revert back if there is a solution.[code...]
View 6 RepliesI am building a custom search control in VB.NET and came across a problem getting distinct records into my datagridview. I want to bring exact matches back first so I run 2 of the same query on the same table with a slight difference:
select ... like "code%"
select ... like "%code%"
I have a datatable that I need to get distinct records from; I am append records from a sql query to the end of the datatable so I cannot use a union in sql to return the dataset (I want to preserve the order which the rows are added) I have been using this which is working fine for 2 fields:
dt2 = dt.DefaultView.ToTable(True, "Code", "Name")
But when I have 3 (or more) fields I get duplicates ONLY for the row I am querying:
dt2 = dt.DefaultView.ToTable(True, "Code", "Name", "Initial")
select ... like "initial%"
select ... like "%intial%"
I am clearing the datagridview.source before rebuilding this. Is there a way to get the distinct rows this way or should I just build something myself to remove the duplicates from the second datatable before appending them to the new table?
Is it possible to add a DropDownList inside a calendar day for the asp.net Calendar control and then to bind it to a SelectedIndexChanged event? I can add the DropDownList inside the day I want, but I've been unable to bind it to the event. I've seen it done for a LinkButton inside a Calendar control, but nothing for a DropDownList.
View 3 RepliesHave two dropdownlist inside the edit template of a DataList. The first dropdwon is for state while the second is for town. The state is populated from a table state while the second from a table town when state is selected.
View 1 Repliesa query, as I can make a development of two nested dropdownlist in a gridview, so that one is loaded with data according to the selection of first.
View 2 RepliesFor the page I'm developing I need a DropDownList with CheckBoxes on it, so that the users can choose more than one option without having to use the Ctrl key (and it's more intuitive). Because my options are being retrieved from the Database, the list of option can be really big, so using a CheckBoxList would use a lot of space. with this? I'm almost desperate! I have been search for a couples day, but having problems in everything I tried. What I'm trying to do now is override the DropDownList control (as suggested in this forum: [URL]), but I'm having problems right in the first line:
[Code]....
i create my custom combobox control and i'd like to set DropDownStyle property on DropDownList but it not works correctly. [Code] When i put my custom control in my form i want to see DropDownStyle set to DropDownList and not DropDown as default.
View 9 RepliesOh masters of VB i call upon your power once again !! i'm trying to do the following and i'd like your advice on how to do it because i don't know...i want to add a dropdownlist control to a datagridview, which will be bound and display a specific value for each row (based on a key cell on each row) and that i will be able to select a different value (from the dropdown) and then save the changes to the database.
View 6 RepliesI have a autocomplete dropdownlist(ddl) in my app. When ever I click on the ddl and start typing to find the item I am looking for in the ddl. The ddl is expanded to show all the orders when typing. After I press the enter key to go out and get the order information for that order the Order number in the ddl is missing but here is the weird part. When I don't have the ddl expanded but still have focus on the ddl. When I find the order I need and press enter. The order number is showing in the ddl as the selected one after it has loaded up the order information.
View 6 RepliesI have a window having 2 dropdowmlists(schemename-SN and propertyno-PN) , one chkbox ,one "VIEW" button.SN has options "all" with value=0 and many other options with respctive values.Now,i want the code should behaves as follows:
1.0n window onload, SN must b visible bt PN nt.
2.if i select SN other thn All...the PN shud b visible and if i select "All" ,PN hides.
3.when check box is checked- PN hides,and if it is unchecked- PN visible..
Important:-This whole ddl n chk box are in updatable panel,button is nt in that.I want a browser compatible code so javascript can't b used directly(cz they give problem in mozzila and chrome).Right now, i have done this JavaScript and its is working fine.
function window.onload()
{
DisableProperty();
}
[code]....
but this code is not browser compatible.here onload,onkeyup and onclick functions are used , but they dont work in other browsers except internet explorer.
i am trying to bind a dropDownList control to a select query that has a parameter.the query itself runs fine on sqlserver database when the paramter is replaced with an actual datetime variable.the basic query is: SELECT DISTINCT DeliveryZone FROM dbo.tblComplaints WHERE (DeliveryZone IS NOT NULL)AND (DeliveryZone NOT IN ('**', '??', 'EE', 'T', 'M'))[code]
View 1 RepliesHow do i display all records from access to richtextbox? Now only the last row is being displayed. I need all records in MS access to be displayed. Im using VB 2008 express with MS access 2007.
Private Sub btnRetrieve_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRetrieve.Click
'---provider to be used when working with access database---
[Code]....
Essentially, what I'm trying to do is build a table of data dynamically on a page that is 3 columns wide by however many long.Working off a Classic ASP example, I've gotten as far as trying that, but not all the records display and they still render on the page as rows instead of columns.[code]I'm not overly certain how to do it, and I'm fairly sure it's probably really simple to do on a view page.My other option is to set a finite amount of records to be created and build the table on the page from that, but I'd much rather do it dynamically.I guess also an alternative option would be to use a repeater control? Though I don't know if this is a control that will work with MVC.
View 3 RepliesI know how to display a records to my combobox from my database but right now I am ran out of idea on how I will display a teacher who has a teaching load in elementary and high school.. I have DEPT field which I has either ELEM or HS. What would be the best thing to solve this kind of problem?
I have two option buttons labeled "HS" and "ELEM". I would like that if any of the option button is selected the name of the teachers who are handling elementary ang highschool will appear in the combobox.
On formload I checked the value of the option button and assign either "HS" or "ELEM" like [code]...
I'm just beginer in VB.net and i would like to ask for some tips. I'm already connected to SQL server database, I need example how to display records in textbox in the form (without using databinding) and how to programm button to go to the next record.
View 1 RepliesI have a code that display records from access to 3 different textboxs. But I want to display all fields retrieved from access to RichTextBox but only the last field is displayed. How can i display all data onto the RichTextBox? Attached is the code i used on 3 textboxes. (currently using VB 2008 express and access 2007)
Imports System.Data.OleDb
Public Class Form1
Inherits System.Windows.Forms.Form
[code]....