I have a string qText with the text of a query in it, say qText = "select * from Data". how can I execute it to fill a TableAdapter I have in my form with the resulting data?
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What I want to do is be able to active a query for my datagrid by clicking on a button. How would I do that? Would I create the query as part of my tableadapter???
View 4 RepliesI've recently been trying to figure out a way to get parameterized queries to work and i think i'm almost there but seem to be getting an error when executing my query
Here's the code
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In my app (written in VS 2003) I use OleDbDataAdapter's to load data. I have some functions that enable be to change the OleDbDataAdapter.SelectCommand.CommandText at run time, by adding a "WHERE" or "HAVING" section to the SQL command, or updating the "WHERE " or "HAVING" section. This way I have have generic load data functions. (load all invoices for Customer 123, load all invoices for the year 2009, or load all invoices for Customer 123 for the year 2009).
With the new VS 2008 TableAdapter, the TableAdaper.CommandCollection property is Protected. How can I edit the TableAdaper.CommandCollection(0).CommandText at run time?
I included a MicrosoftReportViewer to my project:
Code:
Private Sub Report_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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I have a query in a myTableAdapter that ends with WHERE column IN (@S). This works fine when I use myTableAdapter.Fill(dataset.table, "text") but I can't find any way that works to provide multiple text strings such as "text1, text2" for the IN parameter.
View 1 RepliesHere's what I need the query to be like.
CODE:
How can I make this work in the TableAdapter Query Configuration Wizard?
I have a tableadapter where the select query is as follows:
I want to select only those rows where the value of orderno is in the TextBox1.text. How can i do this?
SELECT CustomerID, Orderno, CompanyName, ContactName, ContactTitle, Address, City, Region, PostalCode, Country, Phone, Fax
FROM Customers
i am putting this query in my querybuilder in the table adapter but i need to make the query only return the transaction done today!! i dont know the syntax to get the cuurent date today. this query should work in the tableadapter query configuration wizard!!!
SELECT Trans_ID, Trans_Cash, Trans_Deposit, Trans_Mtc, Trans_Alfa, Trans_Desc, Trans_Delete_Flg, Trans_Date, Trans_User_Name, Trans_Admin_Flg,
Trans_Msg_Cost
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ive been learning Vb.net at uni. Ive never used it before and im finding it a little difficult ( supposed to be easy )i usually code in c++ and MFC Problem I have craeted the database and added all the fields to the form.
View 3 RepliesUnable to create a parameter query using the table adapter wizard to process an access db file. Went online and attempted to create an instance for new adapter with out success, when I click finish the wizard does not like the in the query WHERE (Last_Name LIKE @Last_Name). Also receive a warning that my code contains to many arguments for 'txtLastName.Text' Tried to paste screen
Public Class FindMemberForm
Private Sub FindMemberForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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Im working on a project that includes a TableAdapter for filling data. I usually use parameters for queries I create, but what would be the best way to create a query that may have a wildcard without creating a bunch of queries?
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i'm asking a lot of question here, because i have finally found a real helpful place to ask,and i have a lot of questions, anyways i made a login system in which i used an access database, everything is working fine, I Added a TableAdapter and made a query with users and there passwords, this is the code i used:
Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
I'm trying to bind a datagridview to a tableadapter which contains a query that requires parameters (for the WHERE statement of the query). The datasource is a SQL Server database. When I bind the datagridview in design view, it does not let me choose which tableadapter method I would like to use. The way I've been fixing this is to go into the code behind that form, where Visual Studio puts in some auto-generated code that fills a datatable in the dataset and I change the method that it's using there and put in my parameters. I don't think this is the proper way to do it, however, especially because sometimes that code doesn't even get generated! My other solution is to just programatically bind the datagridview to a datatable which I have filled using the tableadapter. This seems like more work than it should be, though.
View 5 RepliesI`m now at the point calling server from vb.net, and run query inside vb.net code.I have write two codes on button click. One button is checked server connection, other should execute query for server table.Connection code is working, as I have set two messages, and getting successfull message. Second code is not working, as nothing happened when press button. Sql statement is very simple, and it works if I run it manually.[code]
View 19 RepliesBanging my head against a wall here. I have a query that looks like this.
SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName LIKE 'JOE%'
That works absolutely fine in query wizard and the DataTablePreview data window. However, when I do this.
SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName LIKE ?
I get nothing when I run the fillby method. If I change the LIKE to =.
SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName = ?
Everything works great. I need to get LIKE working though so I can wildcard search.
I'm using the SQL server OLE db connections if that means anything.
UPDATE
Using the LIKE operator doesn't work at all. When I just swap out = for LIKE. Nothing is returned.
'Initialize The Database Connection'
Dim dbTRCoreDatabase As New TRCoreDatabase
'Query For Get The Employee ID'
Dim listEmployeeID As IQueryable(Of Long) = (From EmpMaster In dbTRCoreDatabase.EmployeeMasters Where EmpMaster.Email = [code]....
Imports System.Data
Imports System.Data.SqlClient
Imports System.Configuration
[code].....
What's wrong with my code, the query seems to be fine, I tried executing it on phpmyadmin.
CODE:
I got this error: ERROR [42000] [MySQL][ODBC 5.1 Driver][mysqld-5.1.36-community-log]You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
I am writing a program that has a listbox which is bound to a dataset. When I click a button (e.g. delete) the item is deleted from the database ok using an SQL query but is still shown in the listbox. How do I get the listbox to refresh/update its display?
View 8 Repliesi am using vb.net 2008 and msaccess i have given the following query to fill a dataset but it is giving me an error. mCmd = " SELECT OfficialInfo.*, "
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Ok I'm creating a sql query with a string variable and executing it in vb. The string would look something like: Insert Into Table (vara,varb,varc) Values ('vara','varb','varc') This works fine.
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I have two module-level variables and Linq query. I want the results of the Let clause to change the global variables - is this possible?
For example:
Dim X As Integer = 0
Dim Y As Integer = 0
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I have a form that when you click a button it begins a query. I want the user to know that they already started a query and they basically need to wait and not hit the button again. To do this I have a list box that has an lbResults.item.add() to it
Code:
Private Sub btnControlKSMS1117Query_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnControlKSMS1117Query.Click
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I have a problem with a sql query. Through the query I am trying to search database for any occurrences of string (can be anything) in a column using the SQL LIKE command. The problem is that it works fine for most of the strings say john, jim, ji"m , but does not work when i include the following characters which are ( ' , { , } , and a single quotation mark). MYSQL query takes care of these special cases by putting them in [] block whenever user enters them .But i am getting the following error when i go to query the database using the GetSelectCommand() in VB.NET
Exception Details: System.ApplicationException: Number of values provided must be equal to the number of placeholders in query.I have checked the query over and over again .. but its fine .My database server is Sql Server 2008.So my application throws the exception in this command:
Using reader As MustDisposeDataReader = _
pmSystem.DatabaseManager.GetSelectCommand(selectStatementBuilder.ToString(), New Object() {})
Where MustDisposeDataReader is an instance of a class in an internally developed library, which inherits from System.Object. pmSystem is an instance of the class PlanManagerSystem which implements the commandlayer. GetSelectCommand() takes the select command
anyone knows how to fetch the query of a view (Sql server) in vb.net?
View 3 RepliesI'm fairly new to visual basic and have a problem that is probably quite easy to solve yet I have been unable to do it so far and am about at wits end.I have an access database with a table that contains a list of cities and states. what i would like to do is to populate a combo box on a vb form with a list of the states in the states column. the query that i have is as follows:
SELECT DISTINCT State from Cities I have previewed the data in the dataset designer and it works, i just can't figure out how to make it fill the combo box. i initially created a table with just all of the states and then used a binding source and table adapter to bind it to the combo box, but if I'm able to figure this out this would help with my application going forward
I am writing a little program that does the following:Allows the user to enter a id number.Then when the find button is clicked, we connect to the database and run a select statement for the id.I am trying to figure out how to get the first name, last name and birthdate into textboxes on my form.
I would like to have a way to display a messagebox if the resultset = 0 so as to tell the user no records found.Then if the information is correct I am going to have a button to update the information which is going to call a stored procedure I have in place to update the record.how to make the connection which I think I have working and then loading the individual fields into the appropriate textboxes.
I want to ask how to i , passed the value i get from my previous form using this"Login.user.Text" to a Query Builder to filter the result based on the value of Login.user.Text" .
SELECT LecturerID, Lecturer_P
FROM Lecturer
WHERE (LecturerID = ??? )
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i'm trying to make a query to a sql database, so when the user enters the id, the columns related to that id will be displayed. but, im getting an error: "Object reference not set to an instance of an object"
the code:
Code:
Try
TextBox1.Text = InputBox("Enter the Id.", "fsdf.")
query = "select * from Students where Id = '" & TextBox1.Text & "'"
[Code]......
