I have been stuck in creating search for Datagridview in Vb.net.
I have one DataGridView that is bound to binding source. It contains data such as:
123456,
213926,
285643,
395687,
I have searched but everywhere but I only found a filter method for binding source or a find method.
The filter method removes remaining rows & find method finds an exact string.
I found a method to find text in DataGridView but that search found the string anywhere in DataGridView column like if user type 2 then it will first select the row having 2 such as 123456.
I want to create search that should find letter in sequence from start & so on.
If the user presses 2 then search should go for cell starting with 2 such as 213926.
Matter solved Frank. Thankyou So Much.
Here is my complete code for others too.
Dim Found As Boolean = False
Dim StringToSearch As String = ""
Dim ValueToSearchFor As String = Me.TextBox1.Text.Trim.ToLower
Dim CurrentRowIndex As Integer = 0
Try
If dgvDishonourReceipts.Rows.Count = 0 Then
CurrentRowIndex = 0
Else
CurrentRowIndex = dgvDishonourReceipts.CurrentRow.Index + 1
End If
If CurrentRowIndex > dgvDishonourReceipts.Rows.Count Then
CurrentRowIndex = dgvDishonourReceipts.Rows.Count - 1
End If
If dgvDishonourReceipts.Rows.Count > 0 Then
For Each gRow As DataGridViewRow In dgvDishonourReceipts.Rows
StringToSearch = gRow.Cells(4).Value.ToString.Trim.ToLower
If InStr(1, StringToSearch, LCase(Trim(TextBox1.Text)), vbTextCompare) = 1 Then
Dim myCurrentCell As DataGridViewCell = gRow.Cells(4)
Dim myCurrentPosition As DataGridViewCell = gRow.Cells(0)
dgvDishonourReceipts.CurrentCell = myCurrentCell
CurrentRowIndex = dgvDishonourReceipts.CurrentRow.Index
Found = True
End If
If Found Then Exit For
Next
End If
Catch ex As Exception
MsgBox(ex.ToString)
End Try
Related
I'm trying to convert the first column from a Data Grid View to a list of string, then search through the list and highlight the corresponding row in red.
This is what I currently have
Dim search As String = txtsearch.Text
Dim lsttitlesort As New List(Of String)()
For i = 0 To dgvbooks.Rows.Count - 1
lsttitlesort.Add(dgvbooks(0, i).Value)
Next
For i As Integer = 1 To lsttitle.Count - 1
If lsttitlesort(i).ToLower.Contains(search.ToLower) Then
dgvbooks.Rows(i).DefaultCellStyle.BackColor = Color.Red
End If
Next
The problem is that when I try to run it, it crashes and displays an error message saying
System.NullReferenceException: 'Object reference not set to an instance of an object.'
I'm new to Data Grid Views: can you explain me how to fix it?
You can search directly on the DataGridView without using a list:
Dim search As String = txtsearch.Text
'iterate through all rows of the DataGridView to search the value.
For Each dgrBook As DataGridViewRow In dgvbooks.Rows
'you can skip the new row at the end (if available).
If dgrBook.IsNewRow Then
Continue For
End If
'check if first column contains the search value.
'if search value found on first column set the background color to red,
'otherwise reset the background to white.
If CStr(dgrBook.Cells(0).Value & "").ToLower.Contains(search.ToLower) Then
dgrBook.DefaultCellStyle.BackColor = Color.Red
Else
dgrBook.DefaultCellStyle.BackColor = Color.White
End If
Next
I trying to perform a calculation on some values within a DGV that has been imported from data within an xls file. but I cant get the loop to work. what I need it to do is read the value of the cells in column 2 and column 3 of each row, put them in to a text box and then output the result of the calculation to column 4 of the DVG. I would post the code but frankly I haven't got anything real to go on. am I correct in thinking I need to be using a For each loop???
Any help or guidance is greatly appreciated.
Thanks in advance
I find it Little hard understanding your request... But how about this?
For Each Row As DataGridViewRow In DataGridView1.Rows
Dim CellValues As New List(Of String)
Dim Failed As Boolean = False
For x = 1 To 2 'This is right. It's NOT supposed to be 2 To 3.
If Row.Cells(x).Value <> Nothing Then
CellValues.Add(Row.Cells(x).Value.ToString())
ElseIf Row.Cells(x).Value = Nothing Then
Failed = True
End If
Next
If Failed = True Then
Continue For
End If
TextBox1.AppendText(CellValues(0) & " + " & CellValues(1) & Environment.NewLine)
Row.Cells(3).Value = CInt(CellValues(0)) + CInt(CellValues(1))
Next
I am returning SQL results into a DataGridView and have run into a problem. I have an option on my form to only show checked values but can't get it working. Here's my code:
For x As Integer = dgvAutogrow.Rows.Count - 1 To dgvAutogrow.Rows.Count
If dgvAutogrow.Rows(x).Cells("checked").Value = False Then
dgvAutogrow.Rows.Remove(dgvAutogrow.Rows(x))
End If
Next
Here's what part of my DataGridView looks like. I want an event to occur that shows only values that have the check box checked.
When I debug I get the following error:
Any suggestions on what to change?
You have to cast the cell as DataGridViewCheckBoxCell and then test the value like this:
For x As Integer = dgvAutogrow.Rows.Count - 1 To 0 Step -1
Dim cel as DataGridViewCheckBoxCell
cel = CType(dgvAutogrow.Rows(x).Cells("YourColumnName"), DataGridViewCheckBoxCell)
If cel.Value = False Then
dgvAutogrow.Rows.Remove(dgvAutogrow.Rows(x))
End If
Next
Also, you had an ArgumentException because the column you specified doesn´t exist, you need to change that.
Code is tried and tested.
You can try this. We need to cast the cell as a DataGridViewCheckBoxCelland change your loop...
For x As Integer = dgvAutogrow.Rows.Count - 1 To 0 Step -1
If CType(dgvAutogrow.Rows(x).Cells("checked"), DataGridViewCheckBoxCell).Value = False Then
dgvAutogrow.Rows.Remove(dgvAutogrow.Rows(x))
End If
Next
I'm trying to filter a list based on input from a textbox. If the item doesn't contain the string, it is deleted from the list. Here is my subroutine:
Sub filterlists(filter As String)
Dim removalDifferential As Integer = 0
For colE As Integer = 0 To RadListView1.Items.Count
Try
Dim itemEpp As ListViewDataItem = Me.RadListView1.Items(colE)
Dim jobname As String = itemEpp(0)
If Not jobname.Contains(filter) Then
' MsgBox(jobname & " Contains " & filter)
RadListView1.Items.RemoveAt(colE - removalDifferential)
removalDifferential = removalDifferential + 1
End If
Catch
End Try
Next
End Sub
Currently this is not deleting the correct items. The TRY is there because when you delete an item the list index changes (which means the for loop length is wrong and will throw outofbounce errors). Any other loop options that will work here?
Assuming you really do want to delete any LVI which simply contains the filter text, you should loop backwards thru the items (any items, not just Listview items) so the index variable will in fact point to the next correct item after a deletion:
For n As Integer = RadListView1.Items.Count-1 to 0 Step -1
If radListView1.Items(n).Text.Contains(filter) Then
RadListView1.Items.RemoveAt(n)
End If
Next
Hello I'm trying to find a way to trim blank cells on my datagridview if the excel cells are blank on import. I found this on MDSN but it doens't seem to be working. Maybe something along these lines will work. I greatly appreciate any help anyone can give!
Dim Empty As Boolean = True
For i As Integer = 0 To dataGridView1.Rows.Count - 1
Empty = True
For j As Integer = 0 To dataGridView1.Columns.Count - 1
If dataGridView1.Rows(i).Cells(j).Value IsNot Nothing AndAlso dataGridView1.Rows(i).Cells(j).Value.ToString() <> "" Then
Empty = False
Exit For
End If
Next
If Empty Then
dataGridView1.Rows.RemoveAt(i)
End If
Next
One problem is you need to work from the bottom up on the DGV:
For i As Integer = DataGridView1.Rows.Count - 1 To 0
If you work from the top down the index of any given row below the row removed changes.