I have a DataGridView which reads data from a custom (CSLA) list object. The dataset might have 100,000 records, and obviously I don't want to show them all at once because, for one, it would take ages to load.I think it would be nice if I could read the first (for instance) 20 records, and make it so upon scrolling to the end of the list, it reads the next 20 and adds them to the DataGridView.
I have experimented with various ways of doing this, mostly using a custom class inheriting from DataGridView to capture scroll events and raising an event which adds new records. I will include the code below:
Public Class TestDGV
Inherits DataGridView
Public Sub New()
[code]....
Though this (sort of) works, it can be buggy. The biggest problem was that if you used the mouse to scroll the DataGrid, it would get stuck in a loop as it process the scrollbar's ValueChanged event after the data was added. That's why I added ScrollbarOff and ScrollbarOn - I call them before and after getting new records, which disables the scrollbar temporarily.
The problem with that is that after the scrollbar is re-enabled, it doesn't keep track of the current mouse state, so if you hold down the 'Down' button with the mouse (or click on part of the scrollbar) it stops scrolling after it has added the new records, and you have to click it again.
I have a form which the datagridview will be built manually by reading in certain data from a text file (this is because the data in the text file will change periodically)The code is correctly adding the proper amount of rows but it is NOT putting the required values in the cells. Any thoughts?
in short not populating, below is the code i'm running with but it isn't loading. Newer to Datagridview so I know I'm missing something. The SQL import I've successfully done with a listbox and borrowed some of the code from that.
Public Class Form1 Private Sub gettournies() Dim sqlconn As New SqlConnection
Historically I used Tek-Tips for stuff like this but I can no longer access my account there and they do not respond to form based mail. Maybe they got tired of the questions too :-)
I am not a student. I manage a 'large' network. Every now and then I need to roll up something for a specific task. Most of the stuff I write only sees my desktop so neatness and originality are not an issue.My current 'project' is throttling back a few of my users disk storage. I am not allowed to implement Quota's (Server 2003 infrastructure) so I thought the next best thing would be a duplicate file report. I purchased Folder Sized 4 which is a beautiful product (I have used it since it's humble beginnings as Bullet Proof Folders). The end users claim that the filename and date checks are not enough to prove a duplicate. Enter my idea.
I have cobbled together a MD5 hash generator from a function found out on the web. Now I want to send the results to a datagridview instead of my current disk files.I has thought that I could access the rows & columns like dgv.row(x).column(x) = "strFile", dgv.row(x).column(y) = "strMD5"Nope, hunting through the available properties did not point me to any likely candidates.
Again, if this is not the place for questions of this nature please let me know. I am not a programmer, nor am I in training to be one. I just toss little things like this together when needed. Importing a CSV file into Excell is working, but it seems rather lame to be taking so many steps.
I have made a list of the objects that I need on the datagridview but how do I display my list items onto the grid? How can I make each of my list items populate on an individual rows?
I am trying to populate a datagridview from a .txt file but I dont know how I can do this.Text file will include data copied and pasted from excel. So the text separator will be tab.
Am Using an Untyped Dataset to populate a datagridview from Table_3. Issue is i really need to Show the 'ColumnStudentsName' from 'Table_1' that corresponds to 'Table_3'
I am populating a datagridview with information from a database. One of the columns is a monetary amount. Right now my datagridview columns just show a double.
I have an unbound DataGridView control that displays a few columns of account data. The first column is a combobox that I fill with data from a dataset of names filtered by what's in a customer field on the form. When you click on a combo on one of the populated rows, the available names come up in the combo. But if the first click in the datagridview is on a new row's combo, various (incorrect) names appear. Only after you click on one of the populated row's comboboxes, does the correct data appear in the new row's combobox control.
I don't really understand why this is happening. I have been using the EditingControlShowing event to populate and add the combo to the new row, but it doesn't seem to be working very well. I hope someone out there has some ideas about the correct way to do this.
[VB 2008]. I'm trying to populate a DataGridView based on information in the Items in a ListBox (specifically, the file names without hypens or file extensions) and the content of the actual files. The DataGridView is supposed to look something like this:
IDNon-Hyphenated File NameFile Data 1. Some fileThe sky is blue. 2. Another fileThe grass is green.
The Items in the ListBox (lstFiles) look like this: C:UsersUsernameDesktopFolderAsome-file.txt C:UsersUsernameDesktopFolderAanother-file.txt
What is happening is that the DataGridView is being populated, but it looks like this: IDNon-Hyphenated File NameFile Data 1 Another fileThe grass is green. 2 Another fileThe grass is green.
It's adding the second file's information to the DataTable twice and not adding the first file's information at all.
Private Sub btnDoSomething_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnDoSomething.Click Dim pattern As String = "([w:\w /]([a-zA-Z0-9-]+?).w+)" Dim reg As Regex = New Regex(pattern, RegexOptions.IgnoreCase) Dim mat As Match For Each Item In lstFiles.Items [Code] .....
My windows application uses a webservice (sql server backend) and now I'm trying to create a new form that has a datagridview control on it and I'm uncertain how to set it's datasource. I'm using visual studio 2005 and I have little experience using the datagridview control. In my webservice, I started the code that will be the datasource - should i be returning a dataset? I know that this code isn't correct, but I'm not sure what it needs:
<WebMethod()> _ Public Function SetMyDataSource() As DataSet Using DBConn As SqlConnection = New SqlConnection(sConnectionString) SetMyDataSource= Nothing
I am populating excel from a data grid view. Everything works fine except that header does not show in excel (just details).
Dim wapp As Microsoft.Office.Interop.Excel.Application Dim wsheet As Microsoft.Office.Interop.Excel.Worksheet Dim wbook As Microsoft.Office.Interop.Excel.Workbook wapp = New Microsoft.Office.Interop.Excel.Application wapp.Visible = True [Code] .....
I've got a window with multiple datagridviews. Each with data from a separate dataTable. All of which are part of the same DataSet. There are a couple of places where one DataTable has a field joined with the lookup dataTable from the dataset. For example a lookup table for LugSizes has a field called LugSize that is also it's primary key. Another table called Device Terminations has a field called LugSize to which the user can only select those values from the LugSize lookup table. I thought it would be as simple as using the Items.Add method for the combobox column whenever a new lookup table row was added to its own datagridview. Unfortunately, when I try to initially clear the items list, the data error event is triggered for every row.
Here's a sample of my code if it helps:
HTML
Private Sub FillLugSizeComboBox() Try If colDTLugSize.Items.Count > 0 Then colDTLugSize.Items.Clear()
I have a form with a DataGridView and ComboBox, both of which are populated with data from an Excel spreadsheet, the source is unbound. My problem is in repopulating the DataGridView with data from another worksheet in the same Excel file when the user selects the corresponding value from the ComboBox. For example if they were to select January from the ComboBox then the DataGridView would load in and display the data contained on say Sheet2, selecting February would load Sheet 3 and so on. I am running Visual Studio 2008.
I've been playing with a DGV. Let's say for my question here, I want a grid that is 10x10. I would like the font in each cell to be Arial 10 regular. Only one character will be in each cell (I'll use "M"). I would LIKE the cells to be 17 pixels by 17 pixels. But, if I manually force the column width to be 17, I get about half of my M and three dots "M...". I'm thinking this is a padding thing but as far as I can tell, everything is set to 0. See code and then more comments below:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load With DataGridView1
[Code]....
Question 1: How can I reclaim some of what seems to be lost space around the cell contents so I don't have to make them bigger than they need to be? I'd like them to be 17x17 with the single character centered within.
Question 2: Do I have to manually set the height and width of each row and column? I'm thinking the RowTemplate setting but can't seem to get it to work.
FYI: This is a new project with a DGV dragged onto the form. All changes have been made programatically.
I am working on a weboage that will display questions and answers (maybe 5 at one time, maybe 7 at another time) returned from a database table. The questions will each be displayed in a div and the related answers displayed in another div. The question will have an icon "Show Answer / Hide Answer"
How can I go about creating a div and then populating it with values from a table?
The general problem is that I can't get the foreign key in one of my child tables to populate the primary key from the parent table. I have a parent table named "ISSUES" and a child table named "ISSDESC". The primary key for ISSUES is ISS_ID which is an autonumber. The foreign key is ISS_ID in the ISSDESC table which is just a number. I'm using MS Access and an OLEDBConnection as the method. I've created the relationship in MS Access and also created the datarelation in the VB.NET code.
i have a datagridviewcomboboxcolumn that i am trying to populate. i set up the DataSource property using the wizard, there after i selected the DisplayMember from a corresponding drop down of fields from the table set up in the DataSource and then lastly i selected a field to be the ValueMember. problem is when i run my program datagridviewcomboboxcolumn is not populated.there is no drop down at all. what should i do to see my drop down or perhaps i need to set up in code.
I have a combobox which populates information from a textfile, however I was wondering if it would be possible to only populate the fourth field? each field in the text file is separated by tab (space).
For example the text file has the following information
orange yellow blue brown green pink purple green yellow black red purple pink black neon green blue purple gold silver
The combobox I want to display brown yellow black gold I have the following coding in place however it shows all fields in the combobox.
I have a small requirement and that is as follows: I am calling a stored procedure and based on the results from the stored procedure, i want to display the data into textboxes. I am using DataSet and DataAdapter for the same. Can anyone help me. My code is as follows:
Dim sqlStripCmd As New SqlCommand("prcAdt_mwo_strip_det_sel", connection.conn) sqlStripCmd.CommandType = CommandType.StoredProcedure sqlStripCmd.Parameters.Add("@strip_no", SqlDbType.Char, 3).Value = txtMwoStpNo.Text
[code]....
I am getting the data and am able to display it into a datagrid, but how do i put it into textboxes.
I have a small requirement and i request anyone tut by providing the source code for the same.The requirement is as follows:how to call a stored procedure by passing paramenters and populate a CheckListBox in VB.NET based on the results returned from the stored procedure.
I have a combo box on a form, it has a large number of values in it (about 40000). When the combo box populates it flickers from invisible to visible for about a second.After investigating this I am sure that it is not the call to the database that is causing this but when the combo is drawn.
I have created a script in powershell that has done this, but amo moving to a VB app and am having troubles.The snippet that I am adding shows what I did in powershell. I created variables using the XML and from a SQL database compared them, and updated the XML to reflect changes pulled from the database. I want to cycle through creating the variables as more may be added in time and want to make sure I don't have to keep adding code to pull out the data manually one node at a time.rudimentary code as I am new to both powershell and VB. Currently using VS2008.
code/xml below. $xml = New-Object XML $xml.load("g: estingackup_local_config.xml")[code].....
I created a simple form which has two tableadapters to a Access database. On the form I have a combobox that uses the Category TableAdapter and it populates on load fine. the other control is a DataGridView1 which is popluated by the Message Table Adapter based on which Category is selected. It does NOT populate on LOAD and thats my problem.
So the result I'm looking for is when you run the app and my first form loads it
A. Chooses the frist Category in the list (and it does that fine)
B. Populates the DataGridView1 based on the first Category (this is my problem) The DataGridView1 does Populate after I re-select the Category in the combobox1.
Here is my code below.
Public Class FunnyMessages Dim catid As Integer Private Sub FunnyMessages_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
I am getting an overflow somewhere while populating my database.The number of records inserted is different every time I get the error and I have been unable to trace where it is coming from.
Can someone help me with this code? I just need to make it so there is no limitation on how much data is loaded in the columns or rows, it populates very nicely for smaller comma delimited files , but if I try to load something that goes for example over to AV column, it errors out.I don't care about VIEWING this data, I am just trying to get it into a LISTVIEW so I can access the data for other methods in my code.Index was outside the bounds of the array. [code]
