I am working with an Unbound DataGridView. I would like to vary the contents of a second combobox based on what is selected in the first. I have code to add the columns and populate the first combobox, but I can't figure out how to do the second one since it can (and usually will) have a different list for each row AND the list must change when the selection in the first is changed.
View 1 Replies
I have a datagridview that has 1 combobox column (it will eventually have between 1 and 3 more) but I can't find anything anywhere on how to add rows to this column. I create the columns:
[Code]...
I just spent over an hour looking up on the internet how to fill a combobox for each row in a datagridview that is unbound. I am adding the rows manually by code. The columns are already there and one of them is set to a combobox.
how to add two items to the combobox? Each row will have the same items available in the combobox.
I am adding two unbound calculated columns to datagridview. The columns show up but does not have the calculated data.
Private Sub Top10ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
Handles Top10ToolStripMenuItem.Click
[Code]......
I have an unbound datagridview with a whole bunch of columns.I need to sort based on 4 columns, the first three are simple strings, the fouth is a date string (which in itself presents a problem, since it wants to sort lexically but I need them in date order).
View 3 RepliesDataGridView1 is bound to a sql table. Cells(0) and (1) come from that table. Cells(2) and (3) are calculated. While debugging the code, the calculations and lookup look fine, but the results will not display in the columns. Here is the code:
Dim SeatsUsed As Integer = 0
For Each r As DataGridViewRow In DataGridView1.Rows
Try
[code]....
I have common sub to save data from data table to database like this ad.Update(tb) It works fine, but problem comes when i populate Datagridview using a joined query which takes values from more than six tables, for example
[Code]...
So i have a datagridview with two combos, when the form it's created i fill the first one with all the MainValues, and the second one with all possible values for the MainValues (called SecondValues) (1..N).Now my issue, when the user selects one value from the first combo i want to fill the second combo with all values related to the selected MainValue, i can do this for example by filling the datatable again with a parameter that filters the data, but if the previous rows have different main values, the dgv throws errors because it doesn't find the binded ones in the new filtered datatable.
How can i handle this? One datatable for each line?! Other thing, i'm using the SelectionChangeCommited event for handling the values change (in theEditingControlShowing), but if the user uses the keyboard to select the values the event doesn't behave in the same way or the way that i need. The values in the combo are numeric values (1001,1020,2010,3010), when the user select one of the values, i need to fill another cell in the same row with the number selected plus some string, example combo:1001 cell:1001XPTO. So if the user presses 1 in the keyboard the combobox selects the 1001 and fills the cell with 1001XPTO, but if i keep pressing the keyboard to select the 1020, by pressing 0 and 2, i get the 1020 selected in the combo, but the cell remains with the 1001XPTO.
I'm populating the datagridview at runtime based on user input. The issue I'm having is that the the combobox is displaying blank. The item I need is in the dropdown (I've added it), but I can't get it selected by default. I've tried the display member but that's not working.
View 1 RepliesI have an unbound DataGridView that I am trying to fill with data, but am having a problem with the combobox column. I create the columns like this:[code]That works, and I have my columns like I want them, but I don't know how to add a row AND select the appropriate item in the combobox. I am adding items like this:[code]I can't figure out how to set the combobox column. And to top it off, since I changed the column from a text column to a combobox column, the grid is throwing exceptions, although it doesn't tell me what's wrong, it just tells me to handle the dataerror event, and all that I can get from that is e.Context = 3 and I can't find out what that means. Probably a type mis-match, but I can't find the proper way do select from the combobox. The rows add OK, but when I scroll the combobox column into view the first item is selected then the errors get thrown.
View 1 RepliesThe user picks x amount of scenarios from the combobox, and x amount of columns appear in the datagridview. If the user changes the number of columns from x amount to y amount, the columns should be added/removed respectively but currently when y amount is chosen x amount of columns are in the datagridview.
I'm not sure how to do this, I've tried using an IF statement under the .SelectedIndexChanged event but the code adds columns until it reaches as high as it can go, then pulls an error saying too many columns.
I have a datagridview.. It is unbound to any database and has 2 columns..1 is item name and other is amount/expense, incurred..I want the total of expense incurred be displayed in the textbox on button click ie adding the numbers in amount column..
[Code]...
i just finally got my code, with the help of you guys, working to fetch column values from my database and display it in a ComboBox.
Now i am thinking to myself that simply displaying a customer's surname just is not enough due to repetitive issues etc. What i propose that i should do is have multiple column values in a the combo box. For example
CustomerID, Surname, Firstname
My current code is:
con = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:My DropboxDocumentsTaxi Service ProjectDatabaseTaxiProjectDatabase.accdb;")
con.Open()
[code]....
I have this code here:
[Code]...
I know there is MyDataTable.columns How can I get it to put the columns into a ComboBox so i can select them?
when you can't make use of the item value property in an unbound combobox? I get access to it in html, so one would think you could do it in .Net.
View 8 RepliesI have a table in a data grid the columns are bound to the columns...
SQFT QTY WIDTH LENGTH
i also have added into the datagrid an unbound column called Yeild%.what i'm trying to do is the following formula
SQFT / (QTY * (width * length / 144) and have the result return the answer in the unbound yield column for that row represented as a percentage
So if SQFT = 178 QTY = 2 Width = 144 Length = 102 answer would be 0.87 (rounded)
so this would be 87%
I have a DataGridView (dgv) on a Windows form (VB.NET) which is bound to a datatable. One of the bound columns is a an ID (Foreign Key) to another datatable. All I want to do is Hide the ID column and populate an unbound column with the Name (ParmName) for the user. I searched the foreign value in the datatable and retrieved the information. I set the Value of the cell in the Datarow. All works well, but does not display. The cell accepts the value...I can even Debug.Print the values to the console. They are there just nothing displaying in DataGridView. Nothing odd about DataGridView. Should be straight forward...
My Code
,
Dim dtParm As DataTable = MyDataSet.tblParameter
Dim dgv As DataGridView = Me.dgvResultNum_DataGrid
[code]....
What I'm just trying to do is the following:I need to fill a combobox from a dataset, but I have to translate the entries before displaying them. That's why I assume I have to use a loop to add the Items.
View 2 RepliesI want to use a CB where I can define the display/value combinations. The same way a radiogroup works.I have been searching for hours and can't find an answer. This is commonin other languages but apparently in VB it is only done when using a Bound CB.
View 4 RepliesI am designing a form to Enter new City Name list where i accept following fields
CityName, District, State, Country, Pin.
because a State names and Country names can be retrived from earlier entries, i want to allow user to select desired name from a list in combo box or a list in Auto Complete Custom Source for text box, to do this i have added a Table Adapter to underlying DataSet having Query "SELECT DISTICT STATE FROM CITY ORDER BY STATE".
Now, how do i use this Table Adapter to fill the ComboBox List without binding
And also Custom Source List for TextBox.
How do I sort a DGV by 2 columns? The DGV is not bound.
View 4 RepliesBecause I have been trying for ages, and each time it returns to default. Under the 'Properties' window, I have taken this image to show what I have done. I have also tried resizing it as it is running, but the next time it is opened it returns to default size.[URL]
View 2 Replieswhat's the best way to add some space between some columns, just to aid the user to read/understand the data (i have more than 50 columns).In this particular case i'm using a data bound dgv and one approach that i'm using currently, it's in the SQL statement add a new column named SPACE1, SPACE2, etc...Something like:
SQL
SELECT col1,col2,NULL AS SPACE1,col3,NULL AS SPACE2...
I know that i can add columns at runtime, and handle the cell paint event to change the left and rigt margins... But i don't know what option should i use, does anyone know a better way or in the above three it's the best one?
I'm using VB.net 2005. I have working programs that I populate DataGridViews with something like the following:
[Code]...
First form has 1 listbox and 2 buttons. Second form has 1 datagridview and 1 button. The first form opens the csv and list the location+filename of the CSV file. When the CSV files are listed in the listbox, the user can edit the selected csv file in listbox through edit button, when edit button is pressed, the second form will show as dialog and automatically opens the CSV files in DataGridView. The user will edit some fields and save and the second form will autoclose. Now here's the problem, when i select another CSV file in the listbox and press the edit button, the previous CSV still shows, even other CSV files I select, still the previous CSV file was showing.
[Code]...
I'm working on a project where I've loaded a database into a DGV. I also have an additional unbound checkbox column for the users to select entries with. I have code in place to read the selected rows and save them into a CSV string, which is then saved in the usersettings. All this works fine.
PROBLEM AREA:
I'm trying to reverse this effect so that when the DGV loads, the checkboxes that the user selected previously are checked (and the others left unchecked). I've debugged this extensively, and using watches have confirmed that all the values in the loops are right, and the conditionals are all kicking correctly, but it seems the code I'm using to actually check the boxes doesn't work. I've searched dozens of web pages, msdn white papers, and forums, but no suggestions will check the darned box. Below is some example code.[CODE...]
In debugging, it seems the value for the Cells IS changed, but the checkbox never gets selected. The try/catch was just to pick any error messages (but there are none with this code). What am I doing wrong here?
I am trying to display unbound data in a DataGridView.I set up columns already design-time. I am at a loss for creating code that adds a new row using the column schema that was created in the Designer?Something like this?
dim newrow as DataGridViewRownewrow.cells.item("name").value = "text here"datagridview1.rows.add(newrow)
I get an error saying the 'name' column was not found?
I have a form created which an unbound datagridview that has three columns. "Position", "ID", "Name". The data is being added at runtime into a database upon the forms completion. (I don't want to add unnecessary rows to the database in the event a person clicks Cancel.) What I need to do is on the deletion of a row in the datagridview, search through the rows "Position" for a "HJ" value. If it's not found, change the "Position" value of the first row to be "HJ".
[Code]....
I am trying to transfer the entire contents of an unbound datagridview (excluding the headers) to the next row of a bound datagridview. This is what I have so far but I'm not sure if I'm on the right track or not.
vb.net
Dim rowcount As Integer = dgv1.Rows.Count
dgv2.SelectAll()
[code].....
Is it possible to show vertical columns lines for datagridview, also for empty area, as VFP grid,as in image?
View 2 Replies
