Looping Datagridview To Get An Array Of String From Certain Column Value?

Jun 21, 2010

how to get an array of string from certain datagridviewcolumn,i try using this code,it doesn't work..

For Each row As DataGridViewRow In dgvPaketRow.Rows
If Not row.IsNewRow Then
Dim str() As String = New String() {row.Cells(0).Value}
Dim strRes = String.Join(", ", modCommon.str)
msgbox(strRes)
End If

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Looping Through Cells In DataGridView Column

Aug 15, 2008

How do you loop through a name column in a DataGridView? What is the collection? The following below does not work.For each X in DataGridView.Columns("Name")Next

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Merge An Array [String()] With A DataTable Without Looping?

Apr 19, 2012

Is there a way of merging (importing or whatver is the correct terminology is) the data from an Array in to a DataTable woithout looping. I already know how to loop through the array to populate the DataTable with new DataRow but I'm looking for something much faster if it exists. I've got a 1 dimensional String array i.e. 'String()' that I need to populate a DataTable with new DataRows.

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Perform A Sum Of Individual Column Of 2d Array And Send The Result To 2d Or 1d Array Or Datagridview?

Mar 12, 2012

I have a 2d array of data that I have performed the sum of the individual column of the 2d array. I want to send the results to a datagridview and also will like to have the result as a 1d or 2d array.

Below is sample of my code

Dim Array1(,) as double
Array1(0, 0) = 5
Array1(0, 1) = 7

[code].....

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Datagridview Column To Array?

Mar 25, 2010

datagridview column to array

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Add An Array Of String To A Datagrid Text Column

Mar 12, 2012

[Code] This is the coding i have used to a datagrid with textbox and combobox column. But for the first column i have to generate a unique name for each item and display in the first column of the data grid. I used array of string and tried to add that array value to the first column. But it is showing the error " Object reference not set to an instance of an object". how to add the unique name column to my datagrid.

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Way Of Getting A Data Table With Various Column Types Into String Array?

Jun 8, 2010

This should be an easy one, looks like I got myself too confused.I get a table from a database, data ranges from varchar to int to Null values. Cheap and dirty way of converting this into a tab-delimited file that I already have is this (shrunken to preserve space, ugliness is kept on par with original):

da.Fill(dt)
' da - DataAdapter '
' dt - DataTable '

[code].....

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String Value For A Boolean Column In A DataGridView?

Jul 24, 2011

I fill a DataGridView with the result of a database query. I have a boolean field named Gender. I want to show "Masc"if it value is True or "Fem" if it's False.

I can't assign a string value to a bool type cell. How can I do this?

PS: I've seen a C# example, but I can't understand how to do this in VB.

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Declare An Array Of Mixed Type [e.g.] Column 1 As String, Columns 2 Through 5 As Integer?

Oct 18, 2010

1] Is there a way to declare an array of mixed type [e.g.] column 1 as string, columns 2 through 5 as integer.

2] Is �Dim myArray( ,5 ) as type� a valid statement and if so will it result in a 5 column array of unspecified length?

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VS 2008 Display String In A Integer Column In A DataGridView?

Nov 8, 2009

I'm just wondering if it's possible to display a string in a integer column in a DataGridView? The reason I'm asking is that I have a column wich displays the place for each runner (it's a sports application). And if the runner is disqualified, it will display "DSQ" instead of the place.

Now, if I want to sort by clicking the column header, there's a problem if there are more than 10 runners. If there are like 12 runners, the sorting will be like this:

[Code]...

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Updating Array Length While Looping Array

Oct 9, 2009

I am working on a code that should capture the color of a pixel in a bitmap and then check if the 8 surrounding pixels have the same color. If the checked surrounding pixel HAS NOT the same color it will be ignored, otherwise if it HAS the same color, it should check for its own 8 surrounding pixels and so on.

To do that, I have created an array that starts with a single entry (the x,y coordinates of the initial pixel). So, when a pixel with the same color is found it is pushed to the end of the array. I used a for each loop supposing that VB would keep looping until the end of my array - and since it is growing, the last position of the array would be always pushed until I have not more pixels to be checked.

The problem is that VB is not respecting it, and is considering my array as if it had just 1 entry. Seems that it catch the size of the array when it enters the loop, and regardless the fact I have pushed new items to the array it doesnt keep looping it.

How can I force VB to update the end of array position while looping it? Although I think it wouldnt be necessary, here it goes the code I have so far...

Code:

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DataGridView: Only Display Specific Length Of String In Column Cell?

Apr 24, 2012

I am using a list<of T> as a data source for a datagridview and would like to handle the draw event of the datagridview to evaluate the string length of the column cell. If larger than a particular number then I would just do something like

cell.value = string.substring(0,(whatever number I need it to be)).

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Search For A String Entered In Column Of Datagridview In A Text File

Jul 2, 2012

I want to search for a string entered in a column of a datagridview in a text file.If this string exists in the file then allow the user to enter it otherwise dont allow the user to enter the string.Also,since I am reading data from the database into the datagridview, I have not added columns to the datagridview using edit columns option. How do I do this in vb.net.I tried doing something like this:

CODE:

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Looping All Records In A Column MS Access?

Jun 9, 2011

I need to loop through all the records in a column in my access database, Currently my program only views the first record in the column and does not go any further, I tried a While loop but I get a NullException error and it says there is no data in my column, her is my code thus far.

Imports System.Data.OleDb
Imports System.Security
Imports System.Security.Principal.WindowsIdentity

[Code].....

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Store DataGridView Content Into A String Array?

Feb 26, 2012

I have a datagridview on my form named DG1 I fill the datagridview cells, now I want to store the content of the datagrdview into a string array.

Dim output As String()
Dim i As Integer = 0
For Each row As DataGridViewRow In DG1.Rows

[code]....

it is giving me a NulReferenceException at: output(i) = cell.Valuehow to store my datagridview content into a string array?

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Looping Through An Array

Oct 16, 2009

I have an arr of sPNoListDefintion.[code]How can I cycle through the elements?Something like For Each i As integer In sPNoList.

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Looping Through An Array Of OvalShapes?

Apr 26, 2011

I'm working on a Connect 4 game. I created a rectangle with 42 holes punched out of it (drawn in Panels Paint event) and I have 42 circles (created with PowerPacks) placed in each punch out. Right now I'm just trying to get the game pieces to drop into place by looping through each column and coloring each punch out sequentially. Here is my

vb.net
Public Class Form1 Private Sub Panel1_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Panel1.Paint e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality Dim dimension As Integer = 50 Dim

[code]....

The problem I'm having is with my array of OvalShapes. I declared it as object and I don't think that's right. The for loop under the click event is not producing anything.

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Looping Through Array List?

Nov 15, 2009

I'm making a card game and I want to try and design my own card deck.

Dim X As Integer
Dim currentCard As Integer, currentCard2 As Integer
Dim RandomNumbers As New Random()
Dim NumberofCards As Integer

[code]....

I started a basic vb.net class for my fall semester of high school, and although I've learned a lot, my goal since the start of the semester has been to do this. I realize there are simpler way of assigning card values than writing 52 if then statements, but I'm planning on doing other things with the statements. As you can see, my main plan of action is to generate a random number for each card, loop through the array list to make sure the random number representing that card hasn't been assigned before, use the value to select the card, and then add the randomly selected number to the array list so it won't be used again (non-repeating random numbers).

1) I'm trying to represent all the numbers with Numberlist.Item(X) and that doesn't work because either a) x represents any one number or b) x always represents only 0, which means it only checks the first number.

2) I think I've read something about using this method for generating random numbers in a loop, that it doesn't work for some reason.

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Code For Displaying A String Array Of (9x13) Values In A Datagridview Control?

Nov 22, 2011

provide a simple example code for displaying a string array of (9x13) values in a datagridview control. I am lost in the complexity of data binding and datagridview controls. I am an experienced VB6 programmer and cannot seem to grasp the transition from flexgrid control to datagridview control.

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Add A Checkbox Column At First Column Of Datagridview Including Column Header?

Apr 9, 2010

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"?

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Looping Variable Array In Sql Statements?

Jul 5, 2011

I am trying to loop an array in a sql insert statement but i can't get it working. Below is a demo i'm trying to get it running. I think i am having problem with the declaration of variable in sql statement.

Public Class Form1
Dim arrayValue(5) As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click[code]......

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Multi-Dimension Array With Looping?

Feb 20, 2011

I am trying to create a multi dimension array that will search each row of the array and total up the number of 0's 1's, 2's, and 3's. I believe that I need to create some sort of looping structure that will search through each row of the array.I have created a listbox that will allow the user to pick which row of the array the program will search.This is what I have created so far, but I am only just learning and I am having trouble wrapping my head around how arrays work. So I'm not sure if I am on the right path or not.

Dim racescores(,) As Integer = {{0, 1, 0, 3, 2},
{1, 0, 2, 0, 0},
{0, 3, 0, 1, 0},

[code].....

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Write Array Contents Without Looping?

Feb 6, 2009

I have a 1-dimensional array that is essentially is written to a csv file. My problem is that after I have loaded the entire array...I wish to write it to the csv file and I'm not sure how to set it up.[code]...

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.net - Looping Through Datagridview?

Oct 15, 2011

Mine is a windows app. containing forms named BOM nd BOMSelected..There is datagridview in BOM which contains checkbox column.. When the user selects checkbox, the selected rows should be seen in the datagridview of other form, SelectedBom..I have coded but don't get it working.. Some error..

Here is what i have done !!

Public Class SelectedBom
Private Sub SelectedBom_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'HemDatabase1DataSet4.partno' table. You can move, or remove it, as needed.
'Me.PartnoTableAdapter.Fill(Me.HemDatabase1DataSet4.partno)

[code]....

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Looping Through Datagridview?

May 10, 2011

Mine is a windows app. containing forms named BOM nd BOMSelected..There is datagridview in BOM which contains checkbox column.. When the user selects checkbox, the selected rows should be seen in the datagridview of other form, SelectedBom..

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Looping - Send The Inputbox Asking For The Value Again Before Moving To The Next Array?

Mar 6, 2012

im having some trouble with my loop code. When the isnumeric code detects it not a number it throws the msgbox error message but moveson to the next array for the user to enter a value via inputbox. Is there a way for the program to send the inputbox asking for the value again before moving to the next array?

[Code]...

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Looping Logic To Sort A Numerical Array

May 26, 2009

I have declared and array

[Code]...

I have created a SWAP function that does the swapping if the index value is greater than the index+1 value, with a loop that will iterate through the array (assuming that you dont have to specify how many iterations are required) until the array is sorted.

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Looping Through Array Of Option Buttons With Similar Name / Seems Not To Be Possible

Apr 13, 2012

In VB6 I could set up code to loop through say 10 option buttons to check their values. The code would be something likie this:[code]But in VB .NET it seems that if I use the Controls command as above I cannot use/check the Checked property as Control does not take that as a property of Control. It seems also that I may have to use the Find property of Control as in "Controls.Find" etc.How can I do this in VB .NET? I have a very control intensive application and I must be able to easily loop through controls and check their values without writing out 10 x the code required.

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Looping Through Cells In A Datagridview?

Dec 2, 2010

when looping through the cells of each row in a datagrid... I am trying to get the cell type...

wheather it is a checkbox or not... and if the checkbox is null... then set it to false...

in my datatable, i've defaulted the value to false, but seems to have not effect

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Pause While Looping Through DataGridView

May 12, 2009

Im looping through a datagridview and there are times when I need to pause it and then start right back up where left off. How could I do this? Maybe get last row that it stopped on then continue on next row or is there something else to better accomplish this.

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