How do I get the value of checkboxcell in DataGridView control?
the value,TrueValue,FalseValue always return as null... in the column I set the TrueValue to "true" and the FalseValue to "false" this is the first time i'm trying to access this control so I must doing something wrong here.
I have a dgv with some checkbox columns. When I load data in the dgv, and I want to check in the cellcontent_click event, whether an another cell value (this is a checkbox cell too) is true or false, I get the error that the operator = is not defined for
dbnull value and for boolean. F.e.:
If
dgvegyenijogok.Rows(e.RowIndex).Cells(3).Value = True
And
dgvegyenijogok.Rows(e.RowIndex).Cells(4).Value = True
And[code]......
I add one checkboxcolumn in design time in the page load I set the value false like this
DataGridView1.Rows(0).Cells(0).Value =
False
Then in the CellContentClick Event I get the current value of Checkboxcell then change the state of the checkboxcell according the value like this
Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
If e.ColumnIndex = 0 AndAlso e.RowIndex > -1 Then
Dim ched As Boolean = DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value
[Code] .....
i am developing an application with vb.net incorporating a Datagridview control. i know that we can make a particular column as checkbox column or text colum or button column. Is there any property/method to make one cell as checkbox cell, other as text cell and another as buttton cell for particular column within the DGVW?
View 5 Replieshow can I get the checkboxcell value for each row on the click of a button?
View 8 RepliesI have a few classes, one is a form, the other is the source of the datagridview. I want to be able to sort the columns of the datagridview by clicking on the header. Here are the classes that I am dealing with:
Imports DiscoveryByte.AddTools.Misc_Tools
Public Class ViewDiscoveryFlashCards
Private DBBindingSource As New BindingSource
[code].....
I want to create customized control on DataGridView Control in Vb.Net. But I am facing too many problem. How to create dynamic rows and columns and columns like
DataGridView Combo Column (extended combobox)
DataGridView Memo Column
DataGridView DateTimePicker Column
[Code]....
I have two datagridview's both are databound. First one shows items for sale and the second stores all the items that were sold. I am trying too transfer selected rows from one to the other but no matter what I keep getting told "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."
View 2 RepliesI have a DataGridView control (DataGridView6) that displays a list of managers. I want to generate a new DataGridView everytime I add a new manager to the list and put it in a specific place on my form.
EDIT: say if i have a main datagridview, and i want to add another datagridview of the same size directly below it, how would i achieve this using the event handler method described in your answer below? im not sure if this is the most efficient way of displaying new members in the program though...
I want to add control like maskedtext box and datepicker in datagridview control as column style but how to possible it.
View 1 RepliesI found this code on msdn showing how to create a calendar drop down in a data grid view:
HERE
I am looking for some guidance on how to implement this code. Do I need to create the grid programmatically or can this be used with an existing dgv?
I have a SQL Server 2008 Express database and am working with VB 08 Express.I have a field in my SQL table that is a bit (for boolean)When I drag the details onto the designer Checkboxes work. When I drag the datagridview on the form the checkboxes in my datagrid are all set false.
View 2 RepliesI have been trying to work with datagridview to take control over its controls but am face with a hard brick, i have been trying to display text on the rowheaders using code, i cant get around that. an example; on rowheader 1 the text should be 'one' or '1' on rowheader 2 the display should be 'two' or'2' and so on. Also like help on validating one of the columns against inputing of String like; 'fst', 'sec', 'b4'. below is the code i try using.
[Code]...
I have a dialog that gets called from time to time. It is only created once, and then shown or hidden. Depending on the current conditions, when I display it, I need to disable the controls on it so that the user does not make any changes.I have code that checks the condition and sets the enabled property to false for the controls. There is a DataGridView control on the dialog, and for some reason, it stays enabled and allows changes. Does anyone know why, or what I need to do to get it to not accept any input?
View 4 RepliesI would like to know how is it possible to link two datagridview control together. Say I have two dgv control on a form and anything I do on dgv1 will also modify the data on dgv2.
View 4 RepliesI have a datagridview control on my form which i have populated it with values from a dataset. Now i am using a button to delete these values from the database which is working perfectly for me but the problem now is anytime i delete the old value still shows in the datagrid which shouldn't be so so i wrote the code to refresh the grid after deleting but is still not working for me as i want.
I am using this code:
Me.UserAccountsDataGridView1.Refresh()
But onething is the value i deleted doesn't show when the form reloads again. but at run time it still has the old value in it again.
Is it possible to add Treeview Control in the DataGridView??
View 1 RepliesI've been working with this for a while now and have finally come to you for help. I have a custom control that inherits from a label and I'm trying to use it in a datagridview. I have followed this example and have tried to adapt it to my needs.
The custom control in this case is a label with a boolean type property named Value. When value is true, the label.text = "ON" and the color is red. When value is false, the label.text = "off" and the color is transparent. This is the effect I need to show in the dgv.
I have attached my developing project and would like you to take a look if you can. The project has a single form with the dgv, the custom control and a button on it. When the button is clicked the value of the custom control toggles. The control on the form changes color and text as it should, but the cell in the dvg simple changes text from FALSE to TRUE.
How to Use the DataGridView control in vb.net
View 12 Repliesis it possible to add a custom control to a datagridview column?
View 2 RepliesI want to add to my site a simple table/excel-like feauture that will display some values. So, I added a gridview. I don't use Datasets or database biding at all. All I have is a small form with two entries. When the user clicks a button, I want to add some values to the datagridview control as a new row. How do I add a new record to datagridview control in VB.NET?[code]...
View 2 RepliesI have an unbound datagrid control I am using to store inspection information. The program records the information from the user, validates the values, and saves it into a database. It will then show the last inspection data in the datagridview. The user has the option of doublclicking a row and changing values and resaving the row. The number of rows per piece inspected varies, so that is why I used the grid to show the inspection data, however, they want to see a running total of each inspection point at the bottom of the grid so when they add the new values, it will update the running totals. I can see how to add a new column for a running total, but the layout requires the sums to be in the last row of the grid. I can add the row to the grid, but I need to make sure it stays at the bottom of the grid when I add a new row, and if possible freeze the row so it is always visible like excel. The program we are re-writting is excel based so this functionality is critical for the inspector to see the running totals for each inspection point.
View 3 RepliesI have a DataGridView with 4 columns which I transfer toa dataset - this works fine, i posted the code belowHowever I adde a CalendarColumn into my DataGridView but this doesnt transfer over to my dataset.Does anyone know how I can add this Calendar column onto my dataset along with the other 4 columns?
Dim col As New CalendarColumn()
Me.dataGridView1.Columns.Add(col)
Me.dataGridView1.Name = "Trip Date"
[code].....
I have drawn out a datagridview onto my form at a certain size.But, say I have 3 rows of data and they dont fill the grid to its bottom. So I'm left with a bunch of empty grey color stuff in the rest of the control below.Is there any simple property/method that will fit the control size to just the rows loaded, or am I being too picky?
View 2 RepliesMigrating from VB6, a control array of flexgrid objects. Obviously flexgrid is not supported by VB.NET, so DataGridView objects have to be used instead. I tried this alternative to placing them in a list.
I have two DataGridView objects which share a lot of code as well as event handlers. They are named D1 and D2 and many properties, such as column headeders etc., are set at define time. The control array is simulated by passing the "index" and selected grid as parameters in subroutines. For example, the routine to fill the grids, is as follows.
[Code]...
I have a datagridview and i want to allow user to go on the save button using any key or shortcut from keyboard, for example, when a user enter all required data into datagridview and she is on the first cell on any row when she press tab key, cursor should go to save button, this is because i dont want users to pick a mouse while using keybaord.
View 6 RepliesI've built a custom user control in VS2010, incorporating two datagridviews, and asplitpanel - The idea is that there is a "Main" datagridview control, and the second is an internally controlled grid that (when shown) displays the Columns which are set as invisible. This allows the user to drag the columns onto the main grid, in order to display the columns.This all works fairly well. I've set the modifiers property on the Main DataGridView to public, so that by and large, the developers can make use of the control just like a normal DGV (albeit with an extra level to the code).
I've also created dummy events for each of the events that the DGV normally raises, and pass them through the usercontrol, so that the developers can attach to the DGV events as normal. Again, this appears to work fine.Unfortunately, I've run into a problem. I'm trying to set the RowSizeMode to DisplayedCells (or indeed any value). If I try it in the designer, it appears to retain the change until I run the application, after which the property reverts back to normal.
I am a new one to vb 2005. I dont know how to filter the datagridview with the 2 datetimepicker control one for start date and another one for end date. I want to search the dates based on the datevalue of the data in one coloumn.
View 8 RepliesI used some code i found that extends the aero glass border across the entire form... looks great... however when i add a control (like a datagridview) it doesnt look right at all because of the transparency of the form...
View 5 Replies[code]i want some help on how to use the datagridview control to perfom tasks that i usually used to perfom using a datagrid control.i've put tha datagrid version of the code above. If you think it you can achieve it
View 3 Replies