My code below will save records to my database as long as all the parameter have values. One of the parameter is @MI (middle initial), however, there are times that student have no middle initial so when I click my button I get error. I want to still save the record even if one of the parameter value is missing.
[code]...
Ive created one database Sql Server Compact Edition 2005, with one table ("Cliente") I know that I can created my database good, but i have a problem saving information since three textbox, in my table(With columns "Nombre" "Apellido" "Cliente". In my form there is a button save ("Guardar"). When I do click in my button appear the next message : "The column cannot contain null values. [ Column name = Nombre,Table name = Cliente ] " and happen the same with apellido and Id_Cliente. And this happen becouse my code cant save the information....
This is the code
Option Explicit On
Option Strict On
Imports System
Imports System.IO
Imports System.Data
[CODE]...
And the code for my button is:
Private Sub cmdguardar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdguardar.Click
Dim myconnection As SqlCeConnection
Dim mycommand As SqlCeCommand
[CODE]...
I managed to displayed records from two tables in one datagridview and the first column being a combobox. Now, I would like to get those records displayed and save it to another table. this what I did.
For i As Integer = 0 To dtgLoad.Rows.Count - 1
Using command As New SqlCommand("INSERT INTO tblteachersload (Teacher ,SubjectName) " & _
"VALUES (@Teacher, @Subject)", cnn)
With command.Parameters
.AddWithValue("@Teacher", Me.dtgLoad("Column1", 0).Value)
[Code] ......
I would like to loop through the records of the datagridview and then save the same to a table.
I have a question on a datagrid object in vb.net 2008, that I what to be populated with certain values of a parameter from mssql database. The connection is made, the column header are loaded, but I what, when the form is loaded, to populate the datagrid only with certain values, doing a select commnad where id has a value given by me.What is the command to have this select done and display the values in the datagrid?
View 3 Replieshow to save records in listview into ms access database table using a button, i've tried with my codes but nothing is saved in the database `Inline Code Example Here`
private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim con As New OleDbConnection
[Code].....
i'm having problem saving my records into database here's my code
[Code]...
I need to be able to save, edit, and delete records in an access database through vb2008. Editing and deleting records works perfect, but I cannot save new records. Can anyone assist?
Here is my code
Imports System.Data.OleDb
Public Class Main_Form
Dim con As OleDbConnection
Dim cmd As OleDbCommand
[code].....
Can you do something like this? Public sub dosomething(byref value as (Integer or Long)) And how can you make a method accepts a unlimited amount of parameters? I'll probaly be able to find a explanation on the internet, but could anyone tell me how this is called. I am not using the right keywords I think..
View 4 RepliesI have a combobox which contains few objects in Items. When the user selects any item from the combobox the values from the Object member variables are stored in the textboxes on the form.The user will change the values in the textbox and then he will select another item from the combobox.
View 10 RepliesI have a WinForm 'frmUploadStatus' which has a datagridview filled with 1000 records & 20 columns.And also I hosted in hosting server ms sql server 2005 database which has tables one of its table 'Status' (it has 10 columns).Now I want to upload from WinForm 'frmUploadStatus' to ms sql db.
If I change only the connectionstring in my program for uploading the records, it takes more time for uploading.
I often need to copy complete transactions from the production system into the test system. The database structure is the same. Some of the fields in a table might have NULL values.
My objective is to write a program that will fetch records associated with a particular transaction and copy them over to the test system. The database is Oracle 9i (production system) and Oracle 10G (on the test system).
[Code]...
If I give a specific member id, it should fetch all records in MEMBER_MASTER and MEMBER_ADDRESS tables and insert these records in the test system. What is the best way of developing this app? Currently I use sqlloader to do this.
I want to build a front-end and I am thinking I could learn some VB .NET along the way.
i have 3 user roles "ALGEMEEN,OZIS,VERPLEEGKUNDIGE".And I want them added to the database.But when I use the code below it only adds the userrole "ALGEMEEN" and not the other 2.
Dim cmdCheckLidVan As New SqlCommand("SELECT COUNT(*) FROM [Lid van] WHERE [Gebruikers-ID] = @ID AND [Rol-ID] = @RolID", connection)
Dim strRolArrCount As Integer
Dim strRolArr() As String
[code].....
Is it possible to make a procedure have a single parameter but the values for that parameter are more than one? I have this procedure:
Public Sub autoComplete(ByVal cboCombo As ComboBox)
With cboCombo
.AutoCompleteMode = AutoCompleteMode.Append[code]....
Now I was wondering if there is a way to use it like this:
autoComplete(myCombobox1, myCombobox2, myCombobox3)
Or can I use a procedure like this with 'With...End With'?
I have a web portal designed in ASP.NET in which we ask customers to enter the data. On the click of submit button all i have done is, just read the data and called a stored procedure which inserts that into a table. There seems to be a problem in SQL Server 2005 while inserting the data from multiple computers at the same time. We have tested in our lab with three computers, result is that we get the data inserted successfully in only one machine and on the other two machines we get error on page. I have used transactions in the stored procedure and also tried setting the isolation levels to READ_UNCOMMITTED, SERIALIZABLE and SNAPSHOT. Nothing seems to work properly.
View 4 RepliesI want to edit values in datagrid in VB.NET and also want to save changed value in database. How can i do it?
View 4 RepliesI would like to save Gridview with all of the columns value and reload the same grid without using database?
View 3 RepliesI'm attempting to build a website and I would like to save values to my Microsoft sql database that are profile properties and them access them to display lifetime stats or totals from playing my websites games. So I think I'm attempting to use the profile object and I need to save a points total and be able to access that via the current user of the page. You're supposed to then be able to play my simple games and each win or loss should update some of those properties. I've been on this step for weeks on end and have spent over 100 hours not getting a single line of code produced and am running out of options to read, and re-read to attempt this.
View 1 RepliesI'm trying to make a Doctor's program where the doctor has to enter the patients detail into several text boxes (Name, Age, Address...). So, after he has entered all the information, he would want to save it somehow so he could open up the information
again. How would i do that. I thought it could be saved in a database, or even in a text file.
I need to populate values from a database(Access) in to vb.net form. after selecting a field from first form, the next form should display all the parameters used in the selected field from the data base. Also if do editing it should be updated in the database.
View 4 RepliesIm taking over a project that pulls information from a database.Currently I have everything I need except the username.The person who setup the project did it as a web project so he used the MemberShip class to create unique user keys based on the person's username.
The username is not stored anywhere in the database only these userID keys.
The client wants a desktop app that mimics the website behavior of writing to the database.
Problem:I ask the user to enter in a username at the login. The username connects to the database on the server.I have no way of grabbing any user info after this point as the primary key(USERID) is a unique key and not a username. Is there a way to convert a MemberShip ProviderUserkey into a string Username or am I screwed?
I'm trying to assign some parameters for a stored procedure with some values that are stored in a data table. in the code, I can set the parameter values to the data table, and give a column header or index without issue, but when it tries to execute at runtime it bombs out.the error I get is a variation on "Failed to Convert Parameter Value from a DataColumn to a String" depending on exactly how I try to assign the value.the data types are all correct elsewhere in the code.
my code for this bit is
Try
ConnectionAttempt.Open()
Try
With NewYearCommand_Dates
[code]....
other things I've tried to get this to work are all variations on the .Value=dates bit, such as
.Value=dates(0) (so using column index)
.Value=dates.columns(0) (again using column index)
I've also tried declaring variables, and setting their values to the values in the columns, but the code returns an error saying that "Value of type 'System.Data.DataColumn' cannot be converted to string".I should point out that i'm doing this for 3 tables at once in this sub, 2 of them will only have a single row of data, but the third has an indeterminate number of rows.I'm afraid I don't know what else to do. I'm lead to believe by my mate and my lecturer that this should work, and of course it will work, but the evidence says otherwise.
I used this coding for a reading column name from access database. But i want how to read every field values of that particular column?
dim dr as oledbdatareader
dr.item(1).tostring
I have a VS 2008 C# application that I'm converting to VB 2008.
This statement in C# works as I expected:
IPAddress IPAddr = new IPAddress(0xFFFFFF0A);
IPAddr has a value of 10.255.255.255.
However, in VB this fails:
Dim IPAddr As New IPAddress(&HFFFFFF0A)
with invalid argument (the parameter of IPAddress should have type Long).This also fails:
Dim Addr as Long=&HFFFFFF0A
Dim IPAddr As New IPAddress(Addr)[code]....
does not produce a value of 4294967050, but -246. It appears to have defined a .net type of Int32, not Int64.How do I declare an Int64 variable in VB using a hex constant?
i want to save a picture of employee in SQL server Database in my college project payroll system,
View 2 RepliesI can retrieve records from my Database fine, but I'm having trouble updating records. I am getting a syntax error on [code] I get this error when I change the Last Name (Row 0, Column 1). [code]
View 4 RepliesI have a program that reads a database file(.csv or.Txt) then allows user to select data from 6 different comboxes and taext boxes are then populated based on the selection made from combobox
I would like to be able to give the user the option to save their settings so next time the program is open it will connect to the same database as the last connection and also have comboboxes go to the last selection Do I have to create a save setting value for each combobox? and the connection string?
is there a simple way to just save everything? so when the program is open it goes back to the last time it was open.
I have a scrollable drawing (in the form paint event) with a height / width ratio up to 1: 10 . I can see the entire drawing by scrolling with the left and right arrow keys. Problem is when I need to save or print the drawing.
1. - If I try to print or save with the: PrintForm1 or with some code for a screen capture I get only part of the drawing, which is seen on screen.Is there any possibility that I save the whole drawing (the entire form, even the part that can not be seen) as a bmp or png ... (something like extended window in "Snagit" program)?
2. - If I want to print the whole drawing, I know that I have to make in a several pages. Does anyone have a similar example of this?
how to get records into oracle database delete from db & update the records i have successfully connected my vb 2008 win form with oracle 10g.
View 1 RepliesI'm creating a report where I want to send a parameter for the number of records to display (I do not want to select the number of records in SQL) I have created a parameter field (?topN) and set the group to use this value which in design mode works well however when I try to set this parameter in vb.net code it does not work. The field which also displays the value shows the parameter correctly though.
View 2 RepliesI'm creating a report where I want to send a parameter for the number of records to display (I do not want to select the number of records in SQL)
View 2 Replies
