I have a datagridview which I have set up with the Form Designer and created 2 columns and set header names and column widths. When I try and fill the datgridview instead of filling the columns I have created two additional columns are appended to the right of the existing ones and the additional ones are populated leaving thje ones I created blank.[code]...
View 7 RepliesI have a data table with query inside, then i need to sent value of data table exactly in datagridview i made before.
View 6 Repliesi have problem when i generate my program the program takes time till in my datagridview from table adapter in which i already create in a dataset any way how to make the program fill the records faster and decrease the loading time when fill in the datagridview? [code]
View 1 RepliesI just want to display data of a single column from an oracle table into a datagridview or a listbox for readonly with no requirements to make changes to it. Simply display the information.What is the best way forward... To used DATAADAPTER or DATAREADER.s DATAGRIDVIEW SLOWER TO FILL THAN a LISTBOX.i am using the following code to fill datatgridview but for some odd reasons at time it is slow to display the data. I want to use listbox instead
Dim ds As New DataSet
Dim adp As OracleDataAdapter
adp = New OracleDataAdapter("select customer_name from customers")
[code].....
SQL statements:
SQL = "SHOW TABLES;"
Try
conn.Open()
The remarked area works fine when I'm accessing a specific table. I've successfully inserted the products_model field into the combobox too. The datagridview does show the table names in the db using the SHOW TABLES sql statment, but I'm not understanding how to get this info into the combobox instead.
Is there an easy way to get data from a table in SQL Express and put it into a Structure? The table has one string column and five bit columns. I'm using VB.net
View 13 RepliesI am creating a form for entering technical data about a part into an Access database. In the same form I have several ComboBoxs that need to have their lists filled from the same reference table in my database. I have a number and unit field for the twist and bending radius properties. I made the unit fields ComboBoxes and I am trying to bind them to referance table in my database called UnitsLength. The relevant structure is as follows....
Form: NewPartForm
Database: CableDataSet
Main Table: PartMechanical - with fields: TwistNom, TwistUnits, BendingRadiusNom, BendingRadiusUnits
Reference Table: UnitsLength - with fields: Unit, Shorthand, Conversion Factor
First tired the following settings....
Data Source: Other Data Sources > NewPartForm List Instances > CableDatase
Display Member: UnitsLength.Shorthand
Value Member: UnitsLength.Unit
SelectedValue: PartMechanicalBindingSource > [The associated unit field]
But the lists didn't populate.... Then I tried these settings
Data Source: UnitsLengthBindingSource
Display Member: Shorthand
Value Member: Unit
SelectedValue: PartMechanicalBindingSource > [The associated unit field]
But now every ComboBox displays the same value but still stores the data in the proper field... it just sets them all the same.
Can someone tell me what's wrong here: Dim sql As String = "SELECT * FROM courses" Dim con As New MySqlConnection Dim dt As New DataTable(sql) Dim cmd As New MySqlCommand(sql, con)
con.Open() ComboBox1.Items.Add(dt)It doesn't show the courses.
I'm trying to set up a form that I can use to sort names. What I've done is set up a table with with the persons name and info in it as well as one field for a platoon number, and my form is basically 5 listboxes. I want unsorted names to appear in the first box, and sorted names to appear in their coresponding listbox (based on the platoon number in the table). I set up a query through the wizard (from the listbox itself) that will pull the info that I want, but so far it seems to pull it to all the listboxes rather than just the one I want.So far I've figured out how to make the listboxes fill on form load or on a button click (though in both cases all the listboxes are filled with the same data).Eventually I'd like to be able to sort these names in the various listboxes by dragging and dropping, but one thing at a time.So:1. Am I going about this from the right angle or am I making this needlessly complicated?2. How can I get this to sort the data to the correct listboxes on formload?
View 1 RepliesI am trying to move through a list "TodaysCard" and print the TimeOfDay.ToString into the first column of every row and to only create the amount of rows that are needed. But am a bit of a novice when it comes to this and can only get it to display the TimeOfDay.ToString value for the first item in the list over and over again. Just wondering how I can get it to iterate through each item properly.
For Each Race In TodaysCard
With (Race)
Try
[Code].....
I am new in forum and in VB 2008 as well, I have a little background in VB6 I am making a program for a project and I need to calculate some mathematical formulas and the results I want to send them in an external device via serial port. To be more specific I have a function, like y(x)=a*x+y0. I get the starting and ending x and y from textbox and I calculate the respective y but I want to store each x and the resulting y(x) in order to send them after the completion of the complete calculation to the serial port.I have tried with datagrid view and dataset but I cannot fill the tables with the results.Does anyone have any idea what I can do.
View 1 RepliesI think what I have here is an environmental issue. When I attempt to fill a dataset from a VFP table I am getting an error message that says "Index Not Found". The reason I feel its environmental is because the process was working perfectly fine last week. The client I am trying to run this program for runs it once per month to integrate one of their FoxPro systems with SQL. It's been in working order since November of last year, but suddenly now I'm getting this error. Some things I have looked at already are updating VFP drivers for both OleDB and ODBC.
'--- FOX variables
Dim cnFOX As OleDbConnection
Dim cmdFOX As OleDbCommand
[code].....
I have been told that the best way to do a search in VB is to fill an array with ALL the records from a table in a database and then filter the records from the array, instead of using the SQL statement Where.
View 25 RepliesI think this may be a usual issue but I am not able to find much info. There is a master customer database and a call log database at work. The call log database has two tables that are updated from the master database monthly. Now I am writing this vb frontend for the call log database and cannot figure out the update portion
For p = 0 To maxrowsC (currently around 1000 rows)
With myCommand.Parameters
.AddWithValue("@HEATSeq", dsCallLog.Tables("ConfigDS").Rows(p).Item(0))
[code].....
I have a View that i am trying to use to fill a TableAdapter with. In my code i fill the table adapter properly the first time, filter my bindingsource and use datarowviews to loop through the rows of data and perform the updates needed (done by a stored procedure). Now the problem is, after these updates take place, i need to fill the tableadapter again so that it reflects these changes. Sometimes the View i am using will have no results, other times it may.[code]This is the exact Error "Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding."Okay, you'll notice that i fill my view, then filter those results on the column Number equal to 1. I loop through all those results and update the table my view is created off of. After exiting the loop i hit the second .fill which times out after about 20 seconds. After testing, this time out only seems to occur when MyView does not hold any records.
I use Visual Studio 2010 and sqlserver 2008. All work is done in VB.NET. Also, during debugging, i paused on the second fill, went to Toad for Data Analysts and ran a SELECT * FROM MyView which did not time out and returned the empty result table in about 19 seconds. I have also tried doing a dispose on the tableadapter before the second fill but it has a similar time out. Sorry if this answer seems obvious or something, i'm only an Intern and am still learning the language. That seems to have done the trick, from my understanding that lets it run until it finishes (SQLServer will shut it down if the connection stays open longer than it allows). The ta.fill runs at about the same pace as Toad coming in around 19-20 second mark and does not error after multiple tests.
Microsoft VB Grade Book. A teacher maintains a database containing two tables-student and grades. The students table has three fields: studentID, lastName, and firstName. The Grades table has four fields: studentID, firstExam, secondExam, and finalExam. At the beginning of the semester, the Students table is filled in completely with a record for each student in a class, and the Grades table has a record for each student that contains only the student's ID number. (Note: The database is contained in the file Gradebook.accdb from the folder CH10Databases.) Write a program that allows the instructor to record and process the grades for the semester. The program should do the following:
A) Use a navigation toolbar to fill the Grades table.
B) After all the grades have been entered, display a DataGridView control showing the name of each student and his or her semester average. The semester average should be calculated as (firstExam + secondExam + 2*finalExam)/4.
I want to fill an Array and list box from a table, with ALL of the records.
I DONT want to use Displaymember. Like shown below...
CODE:
This is the code so far, but it is only filling with the first record.
CODE:
I am woking on an application in which records of a table are stored in another table. In case of duplicate records they will not wriiten to the table and they should be written in a log file.
View 1 RepliesI have 2 databases that I am working with. One is a compant customer database and the other is my personal call log. Now I am creating a front end for the Call Log. I was updating my customer list by Importing 2 tables from the customer database, a series of queries would erase all of my info, take all the data from the imported tables and move it into mine then erase the imported tables.
Im trying to accomplish the same in my VB frontend. I can connect and fill datasets from the customer database. I can erase my tables. How do I take all of this data from the newly created dataset and move it over to my empty tables?
[Code]...
Is it possible to fill a Combo Box with the names of the fields of a table(from a database)?
View 6 RepliesIn VB 2008, I use a combobox on a form, and I want to fill it with data coming from a column of an SQL Server table
The Table is PLG_Rank, Columns are "ID_Rank, Rank_Name, Rank_Code"
I want to fill the combo with PLG_Rank.Rank_Name
After that, on a selection in the combobox, I want to use the PLG_Rang.ID_Rank for a request on the SQL_Server
I need to fill an array with whole column from database table, so i have used reader to read the values from that column, but can not figure out how to put them into array (code below doesn't work) [Code]
View 3 RepliesI have a datasource linked to a table in a database.When I wnated to display this data on a form, I just dragged the datasource onto the form and it did everything for me, including the code to fill it;
Me.ProjectFileTableAdapter.Fill(Me.ProjectFileDataSet.ProjectFile)
My problem, is that this program will have multiple users, and I don't other users to be able to see each others data. So the problem with the above statement is that it fills the table with ALL the data in the datasource. How can I make it only display data that is for a specific user?Here's the code that is used to fill the tableadapter:
Private
Sub
frmViewCurrent_Load(ByVal[code].......
I have the following query that executes when my form loads. It's the rowsource for my combo box. The query is fine and populates the combo perfect, however, when i click into the combo box I cannot click out of it or even close the form. I have tried taking out the line of code that fills the form via table adapter on load and it works fine (opening the form unbound by the main table). Has anyone run into this before? I have another combo box on the form setup the exact same way and this is not happening. I've experimented with different datatypes etc....
code to populate combo box:
Public Shared Function LoadCallSource() As String
Dim sConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and Settingsdiw07My DocumentsDaily Backupsphone memo backend.mdb"
[code]....
If I take out the line
Me.MemoTableAdapter.Fill(Me.Table_Memo.Tables("Memo"), intMemoID)
The Combo boxes do not act up or "Lock"
I created a new query in the dataset designer. There are now 2 queries there. The original one and the new one.I also added named parameters in the Where clause of the 2nd query.This is the query in the new one:
SELECT ID, FatherName, MotherName, EmergencyContactName,
EmergencyContactRelationship, Address1, Address2, City, State, Zip,
PrimaryPhone, SecondaryPhone, Emaile.
[code].....
I am trying to fill my DataGridView using a date for my parameter. My first problem was in my code where I would get the common error message of Too many arguments to public overrides overloadable. I solved that error message by going into the dataset designer, selecting the query and adding RegDate as a parameter. Now my problem is that I will enter a date in my tool strip text box click the button and still get my data grid view filled with all the data.
Try
Dim RegDate As Date = CDate(RegDateToolStripTextBox.Text)
Me.PatientsTableAdapter.FillByDate(Me.Database1DataSet.Patients, RegDate)
[code]....
Is it possible todo directly fill data into a DataGridView.
I want when i select a cell of the DatagridView, with the right button of the mouse, that i get a menu with 4 opties of colors.
When i do a selection, of 1 color from the menu, then change the cell into that color, en automatically save the tabel of the database.
I want to fill a DataGridView with data returned from a SQL. So here is my code [I provided cause some people may think I'm asking for help before trying myself]
I want the DataGridView to be filled by a data from SQL not to show all the records.[code]...
i just want to know on how to fill a datagridview. with the database MySQL, how could i fill it using a DataSet.
View 3 RepliesI have database say xyz.accdb with a table called say details containing the fields (Name, ID, Comment & Status)I want to create a form with DataGridView and get all the details from the details table into the DataGridView though coding (i.e., DataSource should be from code rather than adding it to project).PBL (Visual Studio 2010 Ultimate)
View 11 Replies