I have problems trying to change programmatically the content of a cell of a bound DataGridView.I implemented a minimal piece of code to show the problem.Do the following steps to replicate the problem:
Launch example
Write the title content to create a new row
CTRL+C on inserted title
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I programmatically edit my datagridview cell values. I use the vertical scrollbar to find the row I want to edit, select the row then click an edit button that takes me to another form where changes to the record are made. I then click a button which saves the changes and returns me to the datagridview form. No problems here.
When I return to the grid, the records are displayed with the first record at the top of the grid. That is, the vertical scroll bar has repositioned itself to the very top.
Is it possible for the datagridview to "remember" the position of the vertical scroll bar so that when I am returned to the grid, the rows displayed are the same as when I left?
I have a datagrid view with 8 columns. How do I change the background color for any cell in columns 2-5 where the value equals the value in column 8. For instance:
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How to programmatically change foreground color and make bold text in individual cell location on DataGridView control (Visual Basic)?
I use "dgMatrix.Rows(r).Cells(c).Value = x" to assign individual numeric values to individual cells in a DataGridView control. My question; is there a similar way to change foreground color and make bold the text in this cell, by specifying the individual row/column cell location?
For example; for cell (row 3, col 5) in the DataGridView make text in cell say red and bold or blue and bold so as to highlight and distinguish individual cell contents. As needed, I will also need to reset these properties (foreground back to automatic/black and font from bold back to regular); the reset could be done globally to the whole DataGridView as opposed to indiviaually by cell.
I am using Visual Basic 10/I have 2 datagridview tables. The main datagridview can be edited by the user; adding/removing rows, changing data in text/combo columns, sort, etc. 2 columns from the second datagridview are a carbon copy of 2 columns from the main datagridview. I have achieved this by binding both datagridviews to a dataset. So that when I edit the main datagridview the effects are automatically replicated in the second datagridview.
Before I bound the datagridviews to the dataset I had a fully functional system to save the content of the datagridview to a text file and read it back in. This has now stopped working with the error message 'Can't edit a bound datagridview programmatically'.
I bound datagridview to bindingsource. The bindingsource has its datasource a collection Called Rates which is a collection of Rate items. The rate object has a property called VALUE. I need the user to be able to edit different values for the collection; However, on the datagridview, i need to keep displaying on one column called OldValue the existing Rate value before the change while allowing the user to edit that value in a second column called NewValue.
In other terms, One colum OldValue will keep the existing values from the DB before being edited by the user, this column OldValue is readonly. Another column NewValue will display, the 1st time, the old value from the DB (similar to OldValue when we do the Fetch from the DB), but it`s editable column, so the user can modify each value in the column NewValue without overriding OldValue cells. For now, I bound both columns OldValue and NewValue to the same property VALUE of the Rate object,
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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 DataGridView display Customers Details. The DataSource are from DataSet. After the user have created a new customer record and updated the SQL SERVER Table, Instread of refreshing the whole DataGridView I am trying to add new rows with data from the TEXTBOX into the DataGridView and it generated this error message: Rows cannot be programmatically added to DataGridView's row collection when the control is data-bound This is the coding which the error was generated from:
Private Sub FRefreshDataGridViewRow()
'use strmode to determine New or Edit existing record
Dim strCell1 As String = CType(Me.txtCustId.Text, String)
Dim strCell2 As String = CType(Me.txtCompName.Text, String)
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I have a datagrid with first coloumn as combobox and second one as textbox. The combobox had datasource with displaymember and valuemember. The problem is when i try to retrieve value from database and put it into the grid i get exception
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When user unchecks the checkbox for the datagridview row, messagebox displayed, if the user answers yes the row is deleted, if the user answers no then I need to re-check the check box. however it doesn't actually check unless i click anywhere on the datagridview afterwards. get the dgv to updated?
Private Sub DataGridView2_CellValueChanged(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridView2.CellValueChanged
If e.RowIndex <> -1 Then
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I'm running into some strange exceptions coming from a few workstations that are running one of our Windows Forms Applications. The application is written for .NET Framework 2.0 and coded in VB.NET. We've re-imaged the machines a couple of time but not matter what we do, the same problem occurs. We are not seeing this problem with any other machines besides these two. Below is the exception message and the Stack Trace. Can anyone provide any insight as to why this may be happening?
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I have a DataGridView bound to a data table. I have one column where I permit updates. After I fill the table (at form load), I make an update to this column Then I attempt to update the change back to the bound table. I get the error 'Update requires a valid Updatecommand when passed dataRow collection with modified rows'. I have seen some examples on-line to define, load, and update but since I have the generated datagridview with bindings, shouldn't the update method me a simple 1-liner? [Code]
View 2 RepliesI have a datagridview that is populated from an Oracle 11g DB. What I would like to do is add the values of a column together and display the results in a textbox. What would be the easiest way to do this?
View 2 RepliesI've a problem with DataGridView component when trying to set the value of the CurrentCell. What i'm trying to do is :
I've a DataGridView With values. I want to make a button in my forms and when clicking on it I want to change the selection from the current row to the next. To explain more, by clicking my Button I want to simulate the effect of a mouse click on a DataGridview.
I have made a little bit of code which forces a naturally diverging iteration loop to converge to the value I need, excellent, but it currently is controlled by a button which I click to execute it. What I want to do is to automatically run the module when one of the input parameters changes, to find the new equilibrium value. Forgive me if this is really simple stuff, but I just can't figure out how to do it.
View 8 RepliesI have a items in my database named as
product number | product name | dosage | description | price | remaining box(es)
0023 amoxicillin 50mg none 50 50
i am having problem in my buy button. how can i manipulate the value in the remaining box(es). for example, i select the item named amoxicillin, and i entered 5 on my textbox. when i press the buy button the value in remaining box(es) will be 45.
I am trying to retrieve cell values from a datagridview.I am trying to use the DataGridView.Item().Value property to pull each cell value into a temp variable to it can be added up, but for some reason it is not accepting any variables that I use to count the rows, only integer values.Here is an example of the code I am using.
Dim tempVariable as Decimal
Dim i as Integer
Dim Total as Decimal
[code]....
For some reason it does not like the variable i, and only wants integer values.
How do you change the column type in a datagridview programmatically? I have several tables that I want to allow the user to update using the same form. Depending on the table, I need to change the column type to a checkbox instead of text. Following is the code that I run (just exchanging the table name and column #). Everything works well as long as I don't try to change the column type.
Dim qry = From lst In dbCodes.Codes_InjuryBodyParts _
Select lst Order By lst.CodeDisplay
Me.bsCodes.DataSource = qry
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I wish to programmatically change the value of a particular readonly column of a datagridview when any other column is edited. This is the code I use:
Private Sub gridViewPFI_CellValueChanged(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles gridViewPFI.CellValueChanged
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I have a DataGridView with 3 columns (metric_key, metric_name, metric_value).There are for example, 6 ROWS in this table (6 different metrics), added programmatically (DGV is not bound in any way)
Now, when I assign values in my grid I do:
dataGridView1.item("Metric_value",0).value = "value of the metric in row 0, in the column named "metric_Value".
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I have a project due tonight and suddenly 2 of my datagridviews are acting funky while the others are fine.
I have 2 tables in an sqlce db. the first is books(id, title, copyright) and the next is publisher(id, name, bookid). I'm writing a vb.net frontend to access the data.
I have data bound datagridviews for both tables. Both have their respective ID columns hidden. The publisher dgv uses a combobox cell style to display the book title in the bookid column. So far so good.
I have suddenly run into a problem where if I have clicked in a cell on the books dgv and then click a cell on another row, the title changes to the id value. The publisher dgv also updates to show the id instead of the title.
It sounds to me like there may be a problem with the booktableadapter or bookbindingsource, but I don't know where to start looking for it. I have a 3rd dgv referencing an unrelated table, and it has no problems. The code for both the working and problematic dgvs are the same (only the control names are different).
I have an excel file SpeedStudy.xls located in (C:/files). I need to extract specific cell values to be displayed in a DataGridView.
For example:
I need the value of Cell: B6 to be displayed in the DataGridView under the Road column. How can I retrieve cell values?
This is bugging me. I have a "main" form named frmMain with a DataGridView object named objDataGrid.When a user double clicks on a row or clicks another button, I hide the main form, open a new form and want to reference the values in the row selected by the user but I keep getting an error when I try to access some, but not all, of the datagridview's properties.
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I have a datagridview in which I am dynamically creating the rows and columns. I'm trying to set specific cells font to bold and not sure how to do it!Below is my code and what I'm trying to do.
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I would like to change the backcolor of the cell in a row based upon the value of a checkbox in another cell. The value of cell 2 would be a checkbox, so it is either true or false. If it is true, then color the backcolor of just cell 1?
If MyDataGridView.Rows.Count > 1 Then
For Each orow As DataGridViewRow In MyDataGridView.Rows
Console.WriteLine("DK {0}", orow.Index)[code]......
I have a bunch of columns in a datagrid view (date, transaction type, amount).If the amount in a row is '150.00', I want to make that cell red.I made a Private Sub and run this after the datagridview is filled.
Private Sub ColorCells()
Dim ColumnCount As Integer
ColumnCount = dgvLedger.ColumnCount - 1[code].....
However it seems to have two bugs. When it is first run the first time when the form is loaded, it doesn't put the rows with 150.00 in it in red.If I have a button on the form and set it to run this Private Sub, then it runs through it again and will color the ones in 150 as red.If I resort the datagridview by clicking on a column, they all return to green again, and it looses the formatting.
I have retrieved data from access database into a DataGridView .Let us suppose i am in Row 0.When i change the Contents of Row 0 Cell 1 and press a button the Update query should modify that row but i am unable to modify the value of the cell.The cell maintains it's previous value and the database is not modified .For example if i change the contents of a cell from "David" to "Jhon" how can i change the value of the cell from "David" to "Jhon". I am using VB .Net 2008. How can i get the text changed in a particular cell of a DataGridView
View 4 RepliesI have retrieved data from access database into a DataGridView. Let us suppose I am in Row 0. When I change the contents of Row 0, Cell 1 and press a button, the Update query should modify that row, but I am unable to modify the value of the cell. The cell maintains its previous value and the database is not modified. For example, if I change the contents of a cell from "David" to "Jhon", how can I change the value of the cell from "David" to "Jhon"? I am using VB.NET 2008.
View 2 RepliesI want to make a certain column of my datagridview red based on values from 2 other columns. I have a "HI" column, a "LOW" column and a "Result" Column which are all strings. Now I want to make the result column red if it's values is less than the "LOW" columns value or if it's value is greater than the "HI" columns value. I tried the following code but something is wrong because cells that shouldn't be red are red:
Private Sub dgvTests_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles dgvTests.CellFormatting
If dgvTests.Columns(e.ColumnIndex).Name.Equals("Result") Then
Dim RowValue As DataRow = TestTable.Rows(dgvTests.CurrentRow.Index)
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Can anyone tell me why "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound." I keep getting an error "Invalid Operation Exception was Unhandled" error. All I am attempting to do is allow the user to select products from a list(or a second datagridview) and have it added to the datagridview so they do not have to type in every cell since the other cells are not visible because they do not purtain to their needs. Plus they will be able to save all items at the same time.
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