I'm using VB.NET 2008. I have an Bound DataGridView with a numeric column that can be edited. However when one selects the number and backspaces there is an error. If I trap it in DataError Event the error message is "Input String was not in a correct format". How can I prevent this error?
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OS: windows 7 64-bit /Programming Language: Visual Basic.net on Visual Studio 2010 express edition.I have dataset with 4 tables each one of them is a datasource to a datagridview I want to add a serial number column to the datagridview so I made this
DataGridView1.Columns.Add("serial", "SER.")
For x As Integer = 0 To (ds.Tables("workers").Rows.Count - 1)
DataGridView1("serial", x).Value = (x + 1)
Next
It was working fine untill I added a relationship to the dataset the relationships codes were
Dim relation_WC As New DataRelation("relation_WC", ds.Tables("workers").Columns("id"), ds.Tables("cources_jun").Columns("workerid"))
Dim relation_WV As New DataRelation("relation_WV", ds.Tables("workers").Columns("id"), ds.Tables("vacations_jun").Columns("workerid"))
[code]....
I breaked point the debuging and I found that the serial number column I added is fine and has it's values, but when I reach the line relations.add(the_relation) the serial number column loses it's values and turn into an empty column with no
numbers in it....why this is happening?
Note: I added another relations but the only relations that clear the serial number column are the relations that has a datatable that is a datasource to the datagridview that has the serial number column.
I had the following code :
Dim row As Integer = 0 For row = 0 To pdgvDataGridView.RowCount - 1 pdgvDataGridView.Rows(row).Cells(0).Value = row + 1Next
it's to add auto number into first column of each row. The codes running well, but after the codes completed, the first column of each row remain empty.
I have a field defined as string for phone number which in my SQL cast to Integer.
Format the column as follows
DataGridView1.Columns("ContactPhone").DefaultCellStyle.Format = "(###) ###-####"
This works as expected for cells with a phone number but for cells without a phone number I get
{}- Which seems like the proper output for what I specified.
is it possible to format cells with no data (no phone number) to show up empty in their cell?
I am trying to sort a column in DGV as follows:
DataGridView8.Sort(DataGridView8.Columns(0), ListSortDirection.Ascending)
However, I want to use the name of the column and extract the index number in the first parameter of the Sort method. However this fails:
DataGridView8.Sort(DataGridView8.Columns("Date").Index, ListSortDirection.Ascending)
Is there a way to allow the user to only type in a certain number of characters in a datagridview column? Like a invoice number can only be 1-6 digits long and I want to stop them from typing more than 6 digits.
View 7 RepliesI want to have a msgbox when user press 'backspace' in the textbox.
I wrote this:
Private Sub TextBox2_KeyPress(ByVal KeyAscii As Integer)
If KeyAscii = 8 Then
MsgBox("backspace")
End If
End Sub
Why it doesn't work?
I have a form in an application that I'm building that shows a datagridview with the last field being a checkbox. What I'm attempting to do is if the user clicks on the checkbox and then clicking on "Save Changes" all of the fields on that datagridview row (except the first field) is then saved to a database. I have the following [Code] The error I keep getting is "Insert Error: Column name or number of supplied values does not match table definition.".
View 5 RepliesI have a form in an application that I'm building that shows a datagridview with the last field being a checkbox. What I'm attempting to do is if the user clicks on the checkbox and then clicking on "Save Changes" all of the fields on that datagridview row (except the first field) is then saved to a database. I have the following
Private Sub holidaysaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles holidaysaveButton.Click
For Each dr As DataGridViewRow In DataGridView1.Rows
[Code].....
I'm using vb.net on vb 2005, I create datagrid view that when i click search button on the main form. It will show datagrid view that I want and when i click OK to select any record, the selected record will show on the desire text box in the main form. The problem is the record i choose is record no. 5 of all 10 record but the Bindingnavigator tools bar show that it's the first record of all 10 and when I click Next record arrow, the error message show that the 'PK column name' is unique and the 'value of the PK from my selected record' is already exist. [Code]
View 1 RepliesI am using a DataBindingSource to connect a DataTable to a DataGridView. Everything was working fine until I added a ComboBoxColumn
Dim ReasonColumnIndex As Integer = dgvData.Columns("Reason").Index
Dim ReasonCombo As New DataGridViewComboBoxColumn
With ReasonCombo
.Name = "Reason"
.Items.Add("BREAK")
[Code]...
i use this to populate my datagridview:
[Code]...
to replace this default dialog please handle dataerror event and the combos value then changes to the id of the job i select
How to add a checkbox column at first column of datagridview including column header?After adding, how to code to "check all" or "uncheck all"?
View 27 RepliesI wrote a function to format numbers like this: 123456100,12 -> 123.456.100,12 (I have a function too, which converts numbers from this strings).Now, I have a dgv and a column with these numbers (or rather strings). The sort mode is set to automatic. If I sort the column, it doesn't work, because the values are not really numbers, but strings. But I get the same result (the sorting doesn't work), if I use the formatnumber function (this returns strings too).
I could use the programmatic sort mode and before sorting I format the strings to numbers, then sort the column, and then format the numbers like above. But this is a bit slow (the dgv has appr. 800 rows), and in this case, I haven't an arrow next to the column header text.is it possible to sort the column like a normal number-column with automatic sortmode?
Is it possible to do the following rounding scheme?
36 = 40
37 = 40
38 = 40
[Code]...
I guess what I'm asking is if there's a way to find the value of the number in the ones column and tens column.
I'm doing a notepad project, just because, and in Ms's notepad there is an option for a statusstrip. I'm just having probems getting the line number and I know it's not called column number, more like selection start. When I do the selection start, it works, just not how I want it to like so:
[CODE...]
but when I use that, it acts funny. I have it in my textbox's.keydown event. So if I were to use the arrow keys to navigate around text then it gets thrown off very easily. How would I do this?
I have a datagridview that seems to be working fine until the user adds a name into the unique name column that already exists. I am getting this: System.Data.ConstraintException: Column 'Name' is constrained to be unique. Value 'test' is already present. where and how I capture this error and prevent the users from adding another name, case insensitive, to prevent this huge error from coming up?
View 3 RepliesAdd persistence to multible DataGridView in terms of Hide/Show column and column width
View 1 RepliesIt seems that on clicking datagridview column header, the column will be automatically sorted based on the column type. I have a column showing some numbers. If column type is string, it sorts "1","20","3" into "1","20","3". If column type is double, it sorts into "1","3","20" which is the result that I want. However, there might be some erros in the numbers and error messages(text) will show in the cell instead of numbers. So I cannot set the column type as double. I want to ignore these error messages and sort all the numbers. How can I do this?
Also, I need to add some background colors to different rows in datagridview. So in the column header click event, I call the bkgColor Sub to achieve this. My question is that how can I override the sorting method in this event?
Private Sub DataGridView1_ColumnHeaderMouseClick(sender As Object, e As System.Windows.Forms.DataGridViewCellMouseEventArgs) Handles DataGridView1.ColumnHeaderMouseClick
Try
[code]....
i have a datagridview with three columns. i set the first column to visible=false, so the user can only see two columns.when the user presses the tab key in the first visible column -- column(1), i want to ignore column(2) so that the user only tabs through the rows in column(1)i can't get it to work. it will always tabs through the rows in column(2) even if i use the column name.
[code]...
I want to disable column in datagridview so the column will not receive focus,
when user press tab to move from cell to cell this column will be skipped and the focus move to the next cell or column.
In my window application i have taken one combobox field with its collection as "amc", "war" etc. Now in my datagridview this combobox column is display as Textbox column, i want to change it to combobox with the above collection "amc","war". I have retreiving the result in datagrid through sql query, hence in datagrid edit column section we doesnot have that part to change to Combobox column.
View 1 Repliesin my window application i have taken one combobox column with its collection as "amc", "war" etc.Now in my datagridview this combobox column is display as Textbox column, i want to change it to combobox with the above collection "amc","war".
I have retreiving the result in datagrid through sql query, hence in datagrid edit column section we doesnot have that part to change to Combobox column.
I have:
- Table1 with columns: PK_ID1, LOCATION, DIRECTOR, SELLER, SELLERID, WORKTIME (relationship), WORKCODE
- Table2 with columns: PK_ID2, WORKCODE (relationship) & WORK_DESCRIPTION
My DataGridView do a SELECT * FROM Table1;How can I replace WORKCODE with WORK_DESCRIPTION in DataGridView, please?
Dim Comp = From C In db.Table1 _
Select C.Completed, C.Taken, C.Namne
Datagridview1.DataSource = Comp
Am using the Entity Framework and Columns Completed and Taken are of bit Datatype. When the query results are displayed in the datagridview, these bit columns are returned as of ColumnType Textbox - so i get a Datagridview textbox column with true or false string values.
I want to display Completed and Taken as Checkbox columns (either ticked for True or un-ticked for false) but ofcourse i can't do this in EditColumn dialogue because the Datagridview is unbound.
how can i change this in code at runtime
I am trying to placed several check boxes (15) in a group box or on a form. I receive the following error message in Visual Studio:
Cannot set column, "The value violates the MaxLength limit of this column".
Is there a way to find the column index of a datagridview column using the columns DataPropertyName?I currently use a loop (shown below in the class) which is kind of ugly, but it works. I'd like to do something like this, which seems more elegant.My goal is this, I store the users DataGridView column settings (i.e. DisplayIndex, Visible, & Width).When the user opens the form that contains the datagridview I want to get those settings from the database and apply the settings to the datagridview.[code]
View 5 RepliesI have a data gridview on my windows form with 4 columns. Now I identify a column as followed:
Dim item1 as String = DataGridView1.Item(1, index).Value
So now I use a number ( In this case: 1 ) for the column index, but I want to make it a bit more readable so now I want to obtain the column index based on the datagridview column name.[code]...
I want to move the cursor from column 1 to column 4 but what happened instead the cursor moves to column 5, this happens when I use the enter key event. but run well if I double click. The following description of the program: there are 7 columns of code, item description, unit, price, qty, discount, item amount code when key enter press :
[Code]...
Trying to upload a picture file from an online source and store it in a byte array but am having the error: "Number of Indices is less than the number of dimensions in the indexed array".
Dim Bytes() as Byte
Dim Inet1 as System.Net.Webrequest
