Datagrid New Row Cell Validation - Validate Empty Text And Indicate Error On Cell?
Jun 1, 2010
The problem is that if you never enter anything into a cell for a new row then that cell is never validated. This is a problem because I have columns that should not be null. I am doing the check in the row level validation and storing the information about which cells are empty that should not be empty. The row level validation works fine and the row level validation error indicator goes on,(red exclamation mark at the beginning of the row) but I also need a visual indicator on the individual cells that are in error.
I am thinking that setting the HasError property for the cells that are in error should cause them to display n error style (the default red border). Is there a way to this this either from XAML (perferably) or from code?Alternatively I could cause those cells to re-validate when the row editing is finished. Does anyone know how to do this?
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Aug 2, 2011
I have a datagrid that will be accepting data from an external measuring device via the serial port. The grid is also open to editing records as well. Part of the process of making this grid user friendly is to intercept the "enter" key and move to the next cell until there is a value in the cell. This is only for some cells, other cells can be blank. I have worked out how to intercept the "enter" key from another post on this forum. Here is the code:
[Code]...
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Nov 25, 2011
I get a 'Conversion from type DBNull to String is not valid' error when I proceed to insert the row with a null cell value from my program to MS Sql Server even if the column is already set to accept null values in the database. How do I solve this? FYI I'm using an unbound datagrid, and I get all the screen values during runtime.
Property SerialNo()
Get
Return strSerialNo [code]...
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Jan 4, 2011
I'm using something call ultragrid in my program.The program works as a mini-record keeping area (Like any datagrid, really). Well, I am adding a history to it and it allows the user to see the last 50 records searched. They get a grid showing the records. This, thus far, works perfectly What I want to do is this: I want to select a record (A cell) in the column 'Dog and have the text of that cell appear in a textbox. This is what I've tried with no success.
HTML
Private Sub HistoryTextBox_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles HistoryTextBox.TextChanged
If ugHistoryButton.ActiveRow.Cells("Dog").Selected = True Then
[code]....
It just doesn't seem to want to transfer over when I select the cell in the 'Dog' column.
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Aug 15, 2011
I have searched alot but can only find info on moving entire rows bound between 2 datagrids, but noting on moving single cells. I have some code below that works ok from DGV to textboxes but not from DGV1 to DGV2.
Dim i As Integer
i = DataGridView1.CurrentRow.Index
Form3.DataGridView1.Item(1, i).Value = DataGridView1.Item(0, i).Value
[code].....
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Aug 7, 2009
What im trying to do is, when I click on any row on my datagrid(dgvCompositions), all the cells(16 columns excluding ID column) in that row must be loaded into the 16 textboxes I have (txtB1, txtB2, txtB3....)
So when I click the row, and the entire row is highlighted the text from the cells get loaded into the textboxes.
I know how to pull data or text from specific cells clicked
Private Sub DataGridView1_CellClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellClick
TextBox1.Text = DataGridView1.Item(0, e.RowIndex).Value
End Sub
But the problem I have is that how do I pull all 16 simultaneously and put them into 16 individual text boxes?
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Feb 7, 2010
i'm using this code to display datagrid cell value in rich text box
Code
Dim rowtoselect = DataGridView1.CurrentRow
rowtoselect.Selected = True
rowtoselect.Cells(1).Selected = True
[Code].....
but i want to the richtexbox to display the cells 0 , 1 not only cell 1 i want the rich text box to display the whole cells of the row not just one cell of it
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Jul 30, 2009
how I could code a datagrid's double-click event to have the value in the cell show up in a textbox.
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May 16, 2009
I am attempting to copy the value of the TimeStamp in cell A6 which has the NOW() formula into cell A5 Based on a change in Cell A4. The catch is I don't want it to update every time the sheet is recalculated due to updating links in other cells on the sheet. ONLY when Cell A4 Changes. What do I do?
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Oct 15, 2011
I have a datagridview on my form.There is a column of roll no in the datagridview. I want that whenever user presses anyother key than a number key(ex:1,2,3,4....)than immediately i should get a messagebox that only numbers allowed. I have tried the below code on datagridView Cellvalidation event but its not working. how can i do such validation.
If GridView2.Item(2, GridView2.CurrentCell.RowIndex).Selected = True Then
If e.ColumnIndex = 3 Then
If Not IsNumeric(e.FormattedValue) Then
[Code].....
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Nov 25, 2011
How do I validate the cell's value during edit? I've been using the CellEndEdit Event and using this code as its condition
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Mar 24, 2012
I have one data grid which contains a column which contains long string values. When I edit it, the text box which appears is very small. I want to increase the length of text box.
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Oct 30, 2009
I am trying to get the cell value from a particular cell in a DataGridView table but am having a little problem with the syntax.My research suggests that I need to use the command:
DataGridView.Rows.Item("Index of Row").Cells.Item("Name of Column").CellValue
but when I create the command:
x = DataGridView1.Rows.Item(0).Cells.Item("Dec").CellValue
[code].....
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Jan 15, 2012
how can VB.net validates the format of each cell on the excel file that it opens, for example, the first row should only be numeric, or cannot be null, is it possible that vb.net can check it before it inserts it in the dataset or data table?
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Jan 27, 2012
I am working on applying date validation to excel cell(range) from VB.NET.
Private Sub DateValidExcelRule(ByVal worksheet As SpreadsheetGear.IWorksheet, ByVal DateRange As String)
Dim dt As Date = CDate("1/1/1900")
[Code].....
When I enter 4 digits whole number 7777 it is validating correctly showing message Enter Valid Date, but when I enter 5 digits 77777 it is accepting the value and converting it to 12/10/2112 value and not showing any error message.
Here all I want to do is I want to validate the cell value to any date format mm/dd/yyyy.
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Jul 12, 2009
do I focus back from a cell if its validation fails?With CellValidating event, if I set e.Cancel=True it prevents my cell from leaving.
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Jan 16, 2012
How should I generate an Excel File with this rule?Should not be able to paste an invalid value to a validated cell from other worksheet.
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Feb 29, 2012
I have the following code that checks if the value in a cell contains a nummeric value.
Private Sub dgvOrderRegel_CellValidating(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) Handles dgvOrderRegel.CellValidating
Select Case e.ColumnIndex
Case 4 'Aantal
If Not IsNumeric(e.FormattedValue) Then
[Code]...
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Sep 22, 2009
When the first cell of an excel sheet to import using ExcelStorage.ExtractRecords is empty, the process fail. Ie. If the data starts at col 1, row 2, if the cell (2,1) has an empty value, the method fails.
how to work-around this? I've tried adding a FieldNullValue attribute to the mapping class with no luck.
Here is a sample project that show the code with problems
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Apr 28, 2009
How can i set the background color for datalist empty items
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Jun 8, 2011
how do you show information from a datagrid cell to show up in a text box in another form, this is for a college project.
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Jan 22, 2010
[Code]....
IF cursor leaves column 0 and row 0 then it displays msgbox but I want to check where column 0 and row 0 has value or empty In case of empty cell it must display msg as
msgbox("this is empty cell")
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Jan 3, 2012
How to apply for loop on grid view and to check the empty cell value then show a message...
Dim cnt As New DataSet1.LibraryDataTable
For i As Integer = 0 To cnt.Rows.Count - 1
For j As Integer = 0 To 5
If GridView1.Rows(i).Cells(j).Text = Nothing Then
GoTo e
ElseIf GridView1.Rows(i).Cells(j).ID Then
GoTo a
End If
Next
Next
e:
lblmsg.Text = "he is not return a book"
a:
lblmsg.Text = "he is return all book"
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Nov 29, 2011
in VB.NET DGVedit mode, after press ENTER to move the active cell into the desired cell, notdirectly move to the next line, how is it?
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Dec 1, 2011
I need to display the column header and cell value of the clicked cell in the data grid. For example if I click Argentina from the country column, the text box will display country = Argentina.So far the code I have is, please help me figure out the code for displaying the information in the text box
Private
Sub
DataGridView1_CellClick(ByVal
sender As
[code]....
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Nov 4, 2011
am converting a old vb.net program to WPF and am having trouble. I imported some data to a datatable and dumped that into a datagrid. I now need to go row by row and extract the cell values and use them to update the appropriate database record. This was working in my old program using:
For i = 0 To DataGridView1.Rows.Count - 1
cellvalue = Me.datagrid.Items(i).Cells(8).Value).ToString
(insert to database) etc
[code]......
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Apr 20, 2010
I'm attempting to copy cells, one at a time, from an Excel 2003 (or 2007) spreadsheet to a Word 2003 (or 2007) table. I'd like the code to be version-agnostic, and so am using late binding. The formatting of the contents of the Excel cell, such as color, underline, strike-through, needs to be preserved. My approach is to use a Word doc as a template. It has a table at the top which I can copy to the end of the doc, add rows as needed, and fill in the word table cells with the data from the excel spreadsheet. Unfortunately, all the formatting disappears. All I get is the text itself.
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Dec 23, 2011
Have this code so that when a checkbox in a column of my datagridview is checked, then the corresponding cell in column 2 (of the same row the check box is in) will turn blue with font color white.
[code]...
I'd also like to add a line so that as well as the cell going blue, the bottom border of the cell disappears, so cellborderstyle = none.
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Feb 17, 2009
I wanted to implement the use of Enter key when entering data and moving from cell to cell. How am i going to implement that?
For example:
Text Box 1: Date: 02/02/2009
Text Box 2: Name:
then after entering the date on the text box i wanted to move to Text Box 2using only the Enter key.
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Dec 23, 2011
I have a DataGridView with several columns. One column is a TextBox column named "Status". This column can only show one of three values: 'Final', 'Ready', or 'No Reportable'. I want to have some code that would turn the TextBox cell into a ComboBox cell when the user left-clicks on the cell to allow the user to choose one of these three options. When the user clicks elsewhere or the cell loses focus I want the cell to change back to a TextBox cell.
Here is what I have so far, but the code throws an exception indicated below Plus, I don't think the code would remove the combobox when the cell loses focus.
Exception: "Provided cell does not belong to this DataGridView control."
Private Sub dgvCalculatedResults_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles dgvCalculatedResults.MouseDown
Dim ht As DataGridView.HitTestInfo = Me.dgvCalculatedResults.HitTest(e.X, e.Y)
[Code].....
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