I Have about 10 (DatagridView Count may varies As per User Selected Files From 2 to 10) Datagridview ,So How can i find common value from all Datagridviews ??
Comment If you need more brief details
Below is mine but It find common from 2 -2 datagridviews
For i As Integer = 1 To dgvCont
For j As Integer = 0 To Main.DGVM(i).Rows.Count - 1
For Each Val As DataGridViewRow In Main.DGVM(i + 1).Rows
If Val.Cells(0).Value = Main.DGVM(i).Rows.Item(j).Cells(0).Value Then
Dim cm As String = Val.Cells(0).Value
If cm = "" Then
Else
Analysis.lvCmn.Items.Add(Val.Cells(0).Value)
End If
End If
Next
Next
Next
I understand that you want to set two nested loops accounting for an undetermined number of elements (items in an array of DataGridView, I presume), performing the checks you want:
For count1 As Integer = 1 To dgvCont 'Assuming indices from 1 to dgvCont
For row1 As Integer = 0 To Main.DGVM(count1).Rows.Count - 1
If (Main.DGVM(count1).Rows(row1).Cells(0).Value Is Nothing) Then Continue For
Dim val1 As String = Main.DGVM(count1).Rows(row1).Cells(0).Value
Dim found As Boolean = False
For count2 As Integer = 1 To dgvCont 'Assuming indices from 1 to dgvCont
If (count2 = count1) Then Continue For
For row2 As Integer = 0 To Main.DGVM(count2).Rows.Count - 1
If (Main.DGVM(count2).Rows(row2).Cells(0).Value Is Nothing) Then Continue For
Dim val2 As String = Main.DGVM(count2).Rows(row2).Cells(0).Value.ToString()
If val1 = val2 Then
Dim cm As String = val1
If cm = "" Then
Else
Analysis.lvCmn.Items.Add(val1)
End If
found = True
Exit For 'By assuming that you want to stop searching after finding a match
End If
Next
If (found) Then Exit For 'By assuming that you want to stop searching after finding a match
Next
Next
Next
Your code is not too clear (neither what you want); but this should give you a good enough start to carry out the implementation you are looking for. Bear in mind that this code (like yours) only considers one column (first one); in case of wanting to iterate through all the columns, you would have to add further nested loops accounting for that.
Related
How do I size arrays dynamically while trying to assign values to individual elements of the array from the sheet? In columns A and B I have
A B
1 Houston
2 Miami
3 New York
4 Toronto
5 Los Angeles
I want the VBA to determine the number of elements and size the arrays based on how many elements are there. Then, the defined array gets the values from column B assigned to the elements. In the code below I am trying a For loop to get the values and assign them to each of the elements.
Here is the code I have:
Sub getNames()
Dim n As Integer 'denotes the number of elements
Dim i As Integer 'index
Dim Name() As String
Dim flag As Boolean
'Initialize values
i = 0
n = 0
flag = True
'For loop to determine number of elements
While flag = True
'check if the current cell has data in it
If Cells(i + 1, 1) <> "" Then
i = i + 1
Else
flag = False
End If
Wend
n = i
ReDim Name(n)
For i = 1 To n
Name(i) = cells(i,2).value
Next i
End Sub
However, I keep getting Syntax Error when trying to assign the value from the Cell.
Declare Name as variant
Dim Name as Variant
Then fill it in 3 lines:
With ActiveSheet 'Should change to the sheet in question; WorkSheets("Sheet1")
Name = .Range("B1", .Cells(.Cells(.Rows.Count,1).End(xlup).Row,2)).Value
End With
I am not familiar with using macro's, but I think that what I would like excel to perform is best handled with a macro. So I can use all the input you may have!
I have these headers;
ID Tag Pen Sex Weight Class Inside range
With 450 rows of data. Based on the distribution of the weight data, I have in two other columns (class and number) the number of rows I want to select within each class. The selected rows must have the value "Yes" in the column "Inside range".
I want to randomly select the rows, based on the number needed for each class, and copy these rows to a new sheet. It sums up to 30 rows in the new sheet.
I hope you have a suggestion how to complete this action!
can you try the following, you will need to add a reference to Microsoft Scripting Runtime library:
Const rowCount = 450
Public Sub copyRows()
Dim i As Integer
Dim j As Integer
Dim classes As Scripting.Dictionary
Dim source As Worksheet
Dim colNumber As Integer
Dim colClassName as Integer
Dim colInsideRange As Integer
Dim allSelected As Boolean
Dim randomRow as Integer
Dim sumRemaining as Integer
allSelected = False
Set source = Worksheets("YourWorksheetName")
colClassName = 6 'this is the column number where class names are entered. I am assuming 6
colNumber = 7 'this is the column number where number of rows to be selected are entered. I am assuming 7
colInsideRange = 8 'this is the column number where "Inside Range" values are entered. I am assuming 9
For i = 2 to rowCount + 1 'assuming you have a header row
classes(CStr(source.Cells(i, colClassName))) = CInt(source.cells(i, colNumber)
Next i
Do until allSelected
Randomize
randomRow = Int ((Rnd * 450) + 2) 'assuming you have a header row, + 1 if you don't
If classes(CStr(source.Cells(randomRow, colClassName))) = 0 Then
With classes
sumRemaining = 0
For j = 1 to .Count - 1
sumRemaining = sumRemaining + .Items(j)
If sumRemaining > 0 Then Exit For
Next j
allSelected = (sumRemaining = 0)
End With
Else
source.Cells(randomRow, colInsideRange) = "Yes"
classes(CStr(source.Cells(randomRow, colClassName))) = classes(CStr(source.Cells(randomRow, colClassName))) - 1
End If
Loop
'Enter your code to copy rows with "Inside Range" = "Yes"
End Sub
Sorry if there are some errors or typos, I wrote from my mobile phone.
I am developing an application using Visual Basic 2010 for hydraulic calculations of a pipe network.
This application uses a lot of iterations and loops, depending on the user input and size of network. Most of the results have to be saved temporarily to be used for the next step of calculations.
Firstly, I used a DataGridView to save the results but as the number of iterations increased, the application became very slow.
Now I am trying to create a DataTable, then populate it with some initial results (this part was successful). The obtained DataTable has some columns that are not populated like so:
22 24 10
3 16 22 9 15
16 12 24 13
14 21 10 23 12 1
24 18 23 2 1
Other calculations are performed and a certain value (X) is obtained.
Now I am trying to loop through the columns of a specific row to check if the calculated value (X) equals to one of the values in those columns.
My question is: How can I loop through only the columns that have values (avoiding the columns containing NULL values) for a specific row?
I am a beginner in VB.net. I hope my question is clear as I didn't provide any code.
Thanks in advance for you help.
This is the initial code I used:
Results.DGVInitial.Rows.Clear()
Results.DGVFinal.Rows.Clear()
For m As Integer = 0 To NetworkLayout.DGVNetworkLayout.Rows.Count - 1
Results.DGVInitial.Rows.Add()
Next
Dim I As Integer = NetworkLayout.DGVNetworkLayout.Rows.Count - 1
Dim Sec(I), Ini(I) As Integer
Dim Hyd(I), Dia(I), Len(I) As Single
Dim Qsec(I), Qini(I), Vsec(I) As Single
Dim U(I), Y(I) As Single
Do
I = I - 1
Sec(I) = NetworkLayout.DGVNetworkLayout.Rows(I).Cells(0).Value
Ini(I) = NetworkLayout.DGVNetworkLayout.Rows(I).Cells(1).Value
Hyd(I) = NetworkLayout.DGVNetworkLayout.Rows(I).Cells(6).Value
Dia(I) = NetworkLayout.DGVNetworkLayout.Rows(I).Cells(4).Value
Len(I) = NetworkLayout.DGVNetworkLayout.Rows(I).Cells(3).Value
Dim V As Integer
V = Results.DGVRandomGen.Rows(TotalNum_Runs - 1).Cells(I).Value
Qsec(I) = 0
Dim q As Single = 0
For n As Integer = 0 To Results.DGVInitial.Rows.Count - 1
If Results.DGVInitial.Rows(n).Cells(1).Value = Sec(I) Then
q = Results.DGVInitial.Rows(n).Cells(0).Value
Qsec(I) = Qsec(I) + q
Else
Qsec(I) = Qsec(I)
End If
Next
If V = 1 Then ' if the hydrant is open
Qini(I) = Hyd(I) + Qsec(I)
Else ' if the hydrant is close
Qini(I) = Qsec(I)
End If
Results.DGVInitial.Rows(I).Cells(0).Value = Qini(I)
Results.DGVInitial.Rows(I).Cells(1).Value = Ini(I)
Results.DGVSectionDischarges.Rows(TotalNum_Runs - 1).Cells(I).Value = ini(I).ToString("F2")
Now instead of using
V = Results.DGVRandomGen.Rows(TotalNum_Runs - 1).Cells(I).Value
I would like to replace the "DGVRandomGen" with a DataTable called "DT_Random"
Like I said I am a beginner so I am not sure how to code it but it will be something like this:
For DT_Random.Rows (TotalNum_Runs - 1)
For Each col As DataColumn In DT_Random.Columns
If DT_Random.Rows(TotalNum_Runs - 1).Item(col) = I Then
Qini(I) = Hyd(I) + Qsec(I)
Else
Qini(I) = Qsec(I)
End If
Next
But I want to avoid Null values as not all columns are populated
Thanks
Maybe this will help you:
Dim myXvalue = 24
Dim myDataTable As New DataTable
myDataTable.Columns.Add("Col1")
myDataTable.Columns.Add("Col2")
myDataTable.Columns.Add("Col3")
myDataTable.Columns.Add("Col4")
myDataTable.Rows.Add(22, 24, 10, DBNull.Value)
myDataTable.Rows.Add(3, 16, 22, DBNull.Value)
myDataTable.Rows.Add(24, 18, DBNull.Value, 24)
For Each column As DataColumn In myDataTable.Columns
If IsDBNull(myDataTable.Rows(0).Item(column)) Then
MsgBox("DB Null Found At: " & column.ColumnName)
Continue For
End If
If myDataTable.Rows(0).Item(column) = myXvalue Then
MsgBox("Match: " & myDataTable.Rows(0).Item(column) & " found at " & column.ColumnName)
End If
Next column
Just a quick example, you may need to restructure it a bit, but at least it shows you how to access the values in your datatable by columns. I would do a function that passes a row index as a parameter and returns a boolean. Create two booleans inside the sub, one for dbnull existing in the row, and one for finding a matching value. If dbnull bool is false, and match value is true, then return true. Just make sure you loop all the columns and dont exit early.
If you need me to elaborate let me know.
This code generates a stack overflow. I'm aware it is caused by the procedure calling itself.
What can I do to avoid the stack overflow? Recalling the sub procedure and generating a new random number is the easiest thing to do, however it generates the overflow. The randomly generated number picks a random inventory item, then the if statement matches that number (random inventory item) with the quantity of that item from the deck inventory to make sure it isn't less than 1. If the inventory of that item is 0, the else plays and restarts the procedure, generating a new random number and doing the process all over again. In another procedure I have a function that if the deck's inventory becomes completely empty, then the discard pile replenishes the deck, making the discard pile empty, so there should never be a case where all randomly generated numbers can be associated item with a inventory of 0.
I wonder if I could somehow force the random number generator
Number = (DeckGroup(Rnd.Next(0, DeckGroup.Count)).ID)
not to generate numbers to inventory items DeckGroup(Number).QuantityInteger that are zero. By doing so I wouldn't even need to recall the function.
The random number is generated by a different branch in the same structure group.
Private Sub PlayElse()
Dim CardCheckBoxArray() As CheckBox = {CardCheckBox1, CardCheckBox2, CardCheckBox3, CardCheckBox4, CardCheckBox5}
'Reset Number Generator
Number = (DeckGroup(Rnd.Next(0, DeckGroup.Count)).ID)
Dim PlayerQuantitySubtractionInteger As Integer
For PlayerQuantitySubtractionInteger = ChecksDynamicA To ChecksDynamicB
If CardCheckBoxArray(TextBoxInteger).Checked = True And DeckGroup(Number).QuantityInteger > 0 Then
DeckGroup(Number).QuantityInteger -= 1
'Select the Player depending value of T
Select Case T
Case 0
Player1HandGroup(Number).QuantityInteger += 1
Case 1
Player1HandGroup(Number).QuantityInteger2 += 1
Case 2
Player1HandGroup(Number).QuantityInteger3 += 1
Case 3
Player1HandGroup(Number).QuantityInteger4 += 1
Case 4
Player1HandGroup(Number).QuantityInteger5 += 1
End Select
CardTypeArray(PlayerQuantitySubtractionInteger) = Player1HandGroup(Number).CardType
CardCheckBoxArray(TextBoxInteger).Text = Player1HandGroup(Number).CardNameString
NumberArray(PlayerQuantitySubtractionInteger) = Number
Else
If CardCheckBoxArray(TextBoxInteger).Checked = True And DeckGroup(Number).QuantityInteger < 0 Then
Call PlayElse()
End If
End If
Next PlayerQuantitySubtractionInteger
End Sub
You could use LINQ to weed out all the objects you never want to get first and then use the collection returned by the linq instead of your original collection.
Something like:
Private Sub PlayElse()
Dim CardCheckBoxArray() As CheckBox = {CardCheckBox1, CardCheckBox2, CardCheckBox3, CardCheckBox4, CardCheckBox5}
'Reset Number Generator
Dim temp As IEnumerable(Of LunchMoneyGame.LunchMoneyMainForm.Group) = From r In DeckGroup Where r.QuantityInteger > 0 Select r
If temp IsNot Nothing AndAlso temp.Any Then
Number = (temp(Rnd.Next(0, temp.Count)).ID)
' ** Edit **: This will ensure that you only got 1 object back from the LINQ which can tell you whether or not you have bad data. You *can* exclude this check but its good practice to include it.
Dim obj As LunchMoneyGame.LunchMoneyMainForm.Group = Nothing
Dim t = From r In temp Where r.ID = Number Select r
If t IsNot Nothing AndAlso t.Count = 1 Then
obj = t(0)
End If
If obj IsNot Nothing Then
Dim PlayerQuantitySubtractionInteger As Integer
For PlayerQuantitySubtractionInteger = ChecksDynamicA To ChecksDynamicB
' ** Edit **
obj.QuantityInteger -= 1
'Select the Player depending value of T
Select Case T
Case 0
Player1HandGroup(Number).QuantityInteger += 1
Case 1
Player1HandGroup(Number).QuantityInteger2 += 1
Case 2
Player1HandGroup(Number).QuantityInteger3 += 1
Case 3
Player1HandGroup(Number).QuantityInteger4 += 1
Case 4
Player1HandGroup(Number).QuantityInteger5 += 1
End Select
CardTypeArray(PlayerQuantitySubtractionInteger) = Player1HandGroup(Number).CardType
CardCheckBoxArray(TextBoxInteger).Text = Player1HandGroup(Number).CardNameString
NumberArray(PlayerQuantitySubtractionInteger) = Number
Next PlayerQuantitySubtractionInteger
End If
End If
End Sub
Pass through the list and determine only those that are valid. Then randomly pull from that set. Here is a simple version of it. You could use LINQ as well, but this should be clear enough:
Dim validDeckGroupsIndexes As New List(Of Integer)
For ndx As Integer = 0 to DeckGroup.Count - 1
If DeckGroup(ndx).QuantityInteger > 0 Then
validDeckGroupsIndexes .Add(ndx)
End If
Next ndx
Then use this:
Dim deckGroupNdx As Integer = Rnd.Next(0, validDeckGroupsIndexes.Count)
Number = DeckGroup(deckGroupNdx).ID
In this datatable there are no duplicates, I need the row index where column x value equals 2. I would do it like this:
Dim rowIndex As Integer = 0
For i = 0 To mtable.Rows.Count - 1
If mtable.Rows(i)("x") = 2 Then
rowIndex = i
Exit For
End If
Next
I will be calling this process multiple times per second. Is there a faster way to do this in .NET?
DataTable select could work, i think it should be faster than iterating over the collection of rows.
var index = mtable.Rows.IndexOf(mtable.Select("x = 2").FirstOrDefault());
Multiple times per second is a bit vague - tens or thousands?
You could create a hash table mapping the value of "x" to the row number:
Dim nLookups = mtable.Rows.Count - 1
Dim lookupHash As New Hashtable(nLookups)
For i = 0 To nLookups
lookupHash.Add(CInt(mtable.Rows(i)("x")), i)
Next
then
Dim rowSought As Integer = -1
If lookupHash.ContainsKey(2) Then
rowSought = lookupHash(2)
End If
Or if the range of possible values of "x" is suitable, you could use an array to map the value to the row number.