Equivalent Of The C# Statement "DataGridViewCell[] Cells = New DataGridViewCell[2]"?
Jul 22, 2011I'm translating the C# code found here [URL] to VB.net. Most of it I'm OK with, but the statement above has me stumped.
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DataGridViewCell Validation?
Mar 7, 2010I have two problems related to validation of the DGV cell. First; when I clicked a ToolStripButton, CellValidating event isn't fired. And then it causes problems for me. It needed to be validated.
View 18 Replies.net - Overriding DataGridViewCell.GetClipboardContent?
Sep 5, 2011Some of my DataGridViewCells return the wrong value in their GetClipboardContent method. They are cells in a DataGridViewComboBoxColumn cells, so they use the displayed property, not the value property of the cell. I want it to return the value itself.An initial attempt was simply using
Protected Overrides Function GetClipboardContent(ByVal rowIndex As Integer, ByVal firstCell As Boolean, ByVal lastCell As Boolean, ByVal inFirstRow As Boolean, ByVal inLastRow As Boolean, ByVal format As String) As Object Return Value End Function in my DataGridViewComboBoxCell descendant but then I noted that this method is called more than one time per cell value, once for every data format DataGridView supports by standard, which are format="HTML", "Text", "UnicodeText" and "Csv". For csv, the base implementation appends a comma if it's not the last cell, for html it adds the correct tags depending on if it's the first/last row/cell in the table/table row, etc. I consider this format-specific, not cell-value specific.
So how could I replace the value that ends up in the clipboard without re-implementing all those format-specific aspects? That would result in quite some code for functionality that already exists in the base class, wouldn't it?
C# - Set DataGridViewCell.Value With Option Strict On?
Oct 21, 2011How to test for DataGridViewCell.Value with Option Strict On?
If DataGridViewCell.Value = "some value" then
Gives the error:
Option Strict On disallows operands of type Object for operator '='. Use the 'Is' operator to test for object identity.
EDIT:
The Solution is:
If DataGridViewCell.Value.ToString = "some value" then
Custom Caret In DataGridViewCell?
Nov 4, 2010I'm creating a new windows form application based on an existing AS400 application (don't ask).Now the users are used to have a fat, white, blinking caret all over the place, so the first thing they mentioned when they saw my initial release was "where did the cursor go?" "We don't know which field we're filling in"
I tried to explain that there is in fact a cursor inside the textboxes (and that it is called a caret), but they want their big, fat cursor back.After some searching on the internet, combining snippets, I managed to make the caret look like I want (in fact you can use any bitmap image as a caret as long as you invert the colours).Now this seems to work like a charm for textboxes but they want the same caret when they edit a cell of a datagridview (who could have guessed)
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Custom Usercontrol As Datagridviewcell
Dec 22, 2009[url]
I tried out this calendar column from msdn... I was fascinated by it and try to imitate it but now I want to use a simple usercontrol(a button and a textbox)
It is working fine but I have a bit of a problem with the look. it doesn't resize the cell
Radio Buttons In A DataGridViewCell
Dec 30, 2009Just finished this and figured I would share.. It just uses images, but works very well.. Have a couple work arounds in there so you can still bind it to a Class. Let me know what you think:
View 1 RepliesDisplay Date Control In Datagridviewcell?
Feb 25, 2009i had a problem with datagrid view iam maintaining a visiting details of the patient in the datagridview containing the columns Visitingdate ..etc. my problem is how to insert a date control in the first cell in the datagridview. and that is to be done when user click on the cell. i didnt find any datagridviewdatecolumn in the datagridview properties . Is there any methods to display date control display at the time of cell click event
View 2 RepliesDataGridViewRow.IsNewRow Not Cleared After Setting DataGridViewCell.Value
Jun 18, 2009DataGridViewRow.IsNewRow property is set for the bottom (empty) row. If I set a cell value in the bottom row using DataGridViewCell.Value, IsNewRow remains set. What is the correct way to programatically set a cell value in the botton row to clear IsNewRow?
View 4 RepliesDataGridViewCell Background Color Change Without Losing Focus?
Sep 16, 2009In VB .Net 3.5, is it possible to change the color of a DataGridViewCell (unbound) to a different color and have the cell visibly change before losing focus or leaving the cell? I have a timer that's running that queries with the data present and I'd like for the colors to change immediately instead of after the user leaves the cell.
I've tried DataGridView.Refresh and Me.Refresh and don't get results.
What am I doing wrong? (Below is the code I use to change the background)
''' <summary>
''' Sets or clears the passed cells background to Red
''' </summary>
[Code]....
Error Operator "&" Is Not Defined For Types "Strings" And System.windows.forms.datagridviewcell
Aug 12, 2009I wrote the following code in vb.net:-
cmdOnClick.CommandText = "SELECT * FROM patients where ID=" & grdPatients.Item(grdPatients.CurrentCell.ColumnIndex, grdPatients.CurrentCell.RowIndex)
it shows the error operator "&" is not defined for types "Strings" and system.windows.forms.datagridviewcell
What's The C# Equivalent To The With Statement In VB
Jul 24, 2009Equivalence of "With...End With" in c#?
There was one feature of VB that I really like...the With statement. Does C# have any equivalent to it? I know you can use using to not have to type a namespace, but it is limited to just that. In VB you could do this:
With Stuff.Elements.Foo
.Name = "Bob Dylan"
.Age = 68
[Code]......
VS 2008 Getting .Net Equivalent Of C# Statement?
Mar 10, 2010I have below statement (bold, italics and red) in C#, but i want to know the vb.net equivalent. And also an explanation of c# statement would be great
IMessage m = parser.Parse(strMessage);//str message will contain your HL7 Message
ADT_A01 adtA01 = m as ADT_A01;
string strPID = adtA01.PID.GetPatientIdentifierList(0).IDNumber.ToString(); string strFamilySurName = adtA01.PID.GetPatientName(0).FamilyName.Surname.
ToString();
Equivalent Using Statement Code For Which Online Translators Don't Work?
Aug 26, 2010How do I write the equivalent c# code below in vb.net? This 'About' form is launched by a ToolItemMenu. It is just informational and contains only an OK button
//Form contains company logo, copyright info and OK button.
public About formAbout;
using (formAbout = new About())
[code].....
What's Equivalent Syntax For Anonymous Types In A LINQ Statement
Jun 29, 2010I'm trying to translate some C# LINQ code into VB.NET and am stuck on how to declare an anonymous type in VB.NET.[code]How do you translate C#'s new { ... } syntax into VB.NET?
View 2 RepliesIDE :: How To Deal With Cells Excel Cells That Update Info Via The Web
Jul 5, 2009My main goal is to have an excel spreadsheet that automatically plots the overall success of my stock portfolio over time (% change over time). I've been able to incorporate stock data into my spreadsheet by linking it to the web, but the trouble is the spreadsheet will keep no history of what the previous stock values were, so I can't graph how things change over time. This sounds like it might be too complicated to be built in to excel, so I was wondering if anyone knew how to program this in Visual Basic. Maybe something like this.... If refresh then new cell plus new time stamp. Another possibility would be to have a whole bunch of cells that refresh only once but at longer and longer intervals, e.g.,
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VS 2010 Connect The Cells Of One Of Its Columns To Cells In Some Other DataTables?
Mar 31, 2011I have a DataTable and want to connect the cells of one of its columns to cells in some other DataTables.
For example:
DataTable1.Rows(0).Item(2) is connected to DataTable2.Rows(4).Item(6)
DataTable1.Rows(1).Item(2) is connected to DataTable4.Rows(2).Item(3)
DataTable1.Rows(2).Item(2) is connected to DataTable3.Rows(11).Item(4)
...
How can I do this?
SQL Statement Doesn't Work - INSERT Statement Works Fine In The Form Load But Not In The Button Click Event?
Oct 14, 2009See
Public Class Form1
Dim sql As String
Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter
[CODE]...
The problem, The INSERT statement works fine in the form load but not in the button click event?
If <expression> Then <statement [:statement]> Else [statements] In Concrete Form?
Jan 1, 2010I was convinced that If <expression> Then <statement [:statement]> Else [statements] in concrete form of If a = b Then SayHello() Else SayBye() End has sense. I read article on msdn on If-then-else, but I forgot why I was reading, so I concluded, that snippet above means this
If a = b Then HelloIsSaid : IsNotEnded Else ByeIsSaid : IsEnded But I have tested it now, and I see, that Else without statement is nothing more than decoration. It would be pretty good if it had function I described. Do you think its good request? Or do you know any circumstance where this Else has some function?
Making A Next Statement Into A Loop Statement In Visual Basic?
Jun 8, 2009y friend and I are re-learning Visual Basic, and we are stumped on this bit of code.
For intAsterisks As Integer = 0 To intLine - 1
lblAsterisks.Text = lblAsterisks.Text + "*"
Next
Sql - Perform An Inline Select Statement In A LINQ Statement?
Jun 24, 2011I have the following SQL:
[Code]...
I want to put it (the select count statement) in this LINQ statement so I can get the sales count in my linq statement: Dim TheLeads = (From L In DB.Leads Where L.IsDeleted = False Select L).ToList() Is this possible to do in LINQ?
Change The Exit Statement To A Continue Statement?
Feb 23, 2009add an if statement and an exit statement to my do loop that exits when my future value (FV) is greater than 1000, then to change the exit statement to a continue statement so my loop will continue even though my fv is greater then 1000, point is to get this to run even though my if statement doesnt do anything. problem something wrong in my code and an exception error (xception of type 'System.OverflowException' occurred in mscorlib.dll)
so can someone show me where or why I have an error is, what am I overthinking now! I could use a hint, OMG i could use a tutor for that matter
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ElseIf Statement Into A Select Case Statement?
Jun 23, 2010A co-worker wants to convert the following IfThenElseIf statement into a Select Case statement.
Explain why this is not possible.
If temperature = 100 Then
X = 0
ElseIf population > 1000 Then
X = 1
ElseIf rate < .1 Then
X = -1
End If
SQL Statement :: Nearly Working Just Cant Get Form Values In Statement?
Aug 4, 2010I cant get this SQL statement to insert any of the values in the form to add to the database
sql
sql = "INSERT INTO prevresults (ExamDate, ExamTime, CorrectAnswers, PassPercentage) VALUES (date.now, time.now, rightanswers, percentage.text)"
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Return Statement Which Is True In An If Statement?
May 24, 2012Return statement which is true in an if statement
View 3 RepliesBreak Up The Code In A Method Body Into Statement By Statement Symbols/"tokens"?
Apr 22, 2011I'm writing something that will examine a function and rewrite that function in another language so basically if inside my function F1, i have this line of code var x=a.b(1) how do i break up the function body into symbols or "tokens"?I've searched around and thought that stuff in System.Reflection.MethodInfo.GetMethodBody would do the trick however that class doesn't seem to be able to have the capabilities to do what i want..dit 2:basically what I'm trying to do is to write a program in c#/vb and when i hit F5 a serializer function will (use reflection and) take the entire program (all the classes in that program) and serialize it into a single javascript file. of course javascript doesn't have the .net library so basically the C#/VB program will limit its use of classes to the .js library (which is a library written in c#/vb emulating the framework of javascript objects)
View 4 RepliesExceptions - Can The "Throw" Statement Exist In A Block With No Try/catch Statement
Oct 5, 2009how to use them then before, but am still a little confused with a few aspects. Here goes:
1.) Lets say you have a method that checks for a certain condition(s) and if it fails Throws an exception. Does it have to be in a try/catch block? Meaning can the "Throw" statement exist in a block with no try/catch statement?
2.) Now lets say we have a method that has a try catch block and in it there is a throw statement. When the throw statement is executed does it first try to find an appropriate catch block in the same method or does it immediately go back to the calling method without looking at the catch statements in the current method where the exception was thrown?
3.) I created a custom exception class that inherits from ApplicationException. Next I created a method which has a catch block that catches this type of exception and does some action. Is the System(i.e CLR) smart enough to throw an exception of this type, or does it only throw exceptions from SystemException?
4.) I know that some people are more liberal in their use of exceptions and others use it more sparingly when truly strange stuff happen like the DB going down. I am writing code where I am getting some info back from the database, converting it and then storing it. Sometimes there might be data that comes back from the database and other times the field is empty and the Null value comes back. Therefore in the instances where Null comes back from the database I should not convert the value to anything, since I will get an error. What should I do in this situation? Should I let the CLR throw the exception when it goes to convert the Null value or should I check for the Null value and if it exists not convert?
5.) In general when I throw exceptions, is it sensible to only throw exceptions of the type Application Exception or are there instances where the programmer throws exceptions of the type SystemException?
Make A 'like' Statement Or Use Some Kind Of Wildcard To Make The Statement Not Case Sensitive?
Jul 11, 2010I'm building a listview search feature in my app. (See the code below). It works really well, except if you search "T" then the code removes all items, if you search "t" then it removes every item except for those starting with "t". Is there any way to make a 'like' statement, or use some kind of wildcard to make the statement not case sensitive?
For Each itm As ListViewItem In ListView2.Items
If itm.Text Like TextBox1.Text & "*" Or itm.SubItems.Item(1).Text Like TextBox1.Text & "*" Then
Else
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"End Of Statement Expected" Error In VB 2010 In A Do While Statement?
May 2, 2012I have a line of code that is working in one statement but not the second statement. I'm not sure what I'm doing wrong, I am learning slowly but surely, and it is by no small margin because of the ave found here =) The error is occuring in the intResult = intSelection x intCount line of the SECOND Do While Loop.
The blue squiggle line is under "intCount" just FYI
Dim intSelection As Integer
Dim intCount As Integer = 0
[code]....
Ake All Of The Cells 'blank'?
Mar 29, 2010I have a dataridview control whcih is NOT bound.
Is there a simple way to make all of the cells 'blank'?
