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.
After Filling a DataTable in GridView's DataSource . A column with check box Type appears but it created as read only column and I can't enable it or make it editable... even i tried .readonly = false and still can't be edited
View 1 RepliesI have added an unbound checkbox column to my DGV. I have two questions on handling it:
1. How to have a checkbox on this Column header, which on checking must check all the rows in the DGV and vice versa?
2. How do i get the Boolean value of the checked rows in DGV on event handling? In other words, how do i know what rows are selected?
Am using vb.net 2008 and sql2008 and I want to loop thru frmMovement.DataGridView1 and the checked rows shd get populated into frmMovementReceivedFiles.DataGridView2. But I used Cbool, Boolean.TryParse to convert the the checked value but I still get but still the error: "Conversion from string "" to type 'Boolean' is not valid"
The code is as follows. Or ss there anyway to loop thru the checkboxes and populate them in another DatagridView2?
CODE:
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
how to change column into checkbox with datatype of Boolean?
View 3 RepliesI am querying a MS Access 2007 database to get a recordset in this manner
SELECT LastService Is Not Null AS [Svc], WeekEnding, CarName
FROM tblService;
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]...
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)).
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:
I've added a boolean Column to my un bound Datagridview Like this:[code]
View 1 RepliesIn my DataGridView, I have several columns with check boxes that indicate whether the part has been bought or not. I want to add the summation of each column though to know how many of each parts have been bought by a single company. I have the count code working partially but I cannot get the correct number at all. Here is the code:
[Code]...
I have a datgridview with a checkbox that keeps giving me an error. I have checked the data type in SQL(2008) table and I have it set to CHAR(1), NULL = Y, Default value = ('N'). Image attached that shows the error.
The data loads into the grid except for the checkbox state (checked - not checked)Here is my bindings and add column section. Note: The grid will only display info. Text boxes and a checkbox above the grid will actually be the input source.
[Code]...
If I try to put a string into a Boolean variable such as this:
Dim testValue As String = "True"
Dim bool1 As Boolean = testValue
With Option Strict On I get an error and the suggested fix is to change the second line to:
Dim bool1 As Boolean = CBool(testValue)
This is fine, But - what are the advantages / disadvantages of doing this instead:
Dim bool1 As Boolean = Boolean.Parse(testValue)
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].....
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've got a routine that checks a website my my external address. What I'd like to do is loop through the string just to get the first 15 numbers and full stops (periods). But that isn't my question, my problem is I've got this routine that isn't building because of a string conversion issue. I don't know how to correct it.
[Code]...
I encountered due to a coding error a behaviour I can't explain.In one line I have an implcit conversion from a string to a boolean value:
Class myClass
Public Property myString() as Boolean
Return "123" '<= Implicit Conversion occurs here
End Property
End class
[Code]...
Are there any differences in the behaviour between the .NET Versions?The code is compiled against .NET 2.0 with implicit conversion on.
Dim today As System.DateTime
today = System.DateTime.Now
Dim strDate As String = today.ToString("d")
[Code].....
I currently have the following GridView TemplateField:
[Code]...
From what I read it is a good convention to name a method that returns a boolean value with the prefix of "is" or "has". So in keeping with this convention I am trying to name a method in my program with this prefix but I am running Specifically I have a class called Day. It is a simple class with a few data members and one method that returns a boolean value of true or false. The name of the boolean variable is isSpecialDay. This class has a method called isSpecialDay which takes the date of the day, applies some criteria to the date and then sets the variable isSpecialDay to true or false. My problem is that the boolean variable is named isSpecialDay and so it the method. What should I do?
Public Class Day
Private TheDate as String
Private DayName as String
[code].....
The error occurs on the line If wba.Selected = "MARKETING CODE" Then.
[Code]...
Is there are any way to convert boolean type into "ON"/"OFF" using string formatter
Like:
Dim inpValue as Boolean
Dim outValue = String.Format("0:ON;OFF", inpValue)
' should show OFF as output
I cannot use code or IFormatProvider
How can I create a function from this example:
Private Function CheckForNull(fieldvalue as string) as Boolean
That checks that all my fields are not empty? For example, say I have three fields txtFirstName, txtLastName, and txtAddress. How would I write the function above that would check that these fields were not left empty?
So I had a smart idea to make a dictionary with all my variables so I could save them easily in chunks. This includes String, Boolean and Integers. When I was in Framework 3.5 I only had a few warnings about stuff that I didn't have coded in, but now in Framework 4 I am maxing out all my warnings with Implicit conversions. Personally I don't want to go to every number and put quotes around it put quotes around "True" because then it may change the method.
Public Function loadGeneral(ByVal fName As String) As Boolean
Dim tempDict As New Dictionary(Of String, String)
For Each kvp As KeyValuePair(Of String, String) In GeneralSettings
Dim v1 As String = kvp.Key
Dim v2 As String = QuizZing.My.Settings.GetSetting(fName, v1)
[Code] .....
I have the following code, where I want to use data from the database in an if statement, however it doesnt work, the error of conversion of string to boolean appears.
If "Staff.Welcome.Text = 1" Then
WelcomeRead = True
End If
I want to connect to the proxy server using with the webbrowser while reads the strings of the proxy username, password, ip and the ports in each textbox.ere it is the
Imports System.Net
Imports System.IO
Public Class Form1
[code]....
I have a HTTP class that gets content from URL's, POST's content to URL's etc and then returns the raw HTML content.In the function inside of the class it detects if there is a HTTP error and if so I would like to return false but will this work if I have declared the function to return a String?
Code Sample of what I am trying to do (Note the Return Content & Return False if a HTTP error code is detected)Public Function Get_URL(ByVal URL As String) As String
[Code]...
Add 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]....
