The above code does not appear to be evaluating correctly, at all for that matter. The code block is being processed regardless of the HasRows state. Any idea whats going on? I'm assuming its a setting in the Web.config or VS Dev environment thats the behavior.If I change it to
If SQLDataReader.HasRows = True Then
everything evaluates correctly.
I'm using VB2008 SP1 Express. My app downloads a file from a FTP and compare inside it the registered values,but some users have problems when validating the key,finnaly I found that the following code evaluates TRUE
[Code]...
I'm making an app in VB.net (.NET 3.5), using Oracle 10g XE, trough ODBC, I need users log in, to verify if user exists, I can validate if the query has rows of not, I've found property, but when I used it, some error appeared. Is there any other way to make that?
View 2 RepliesI have the following code;
Dim rdr As SqlCeDataReader = cm_sel.ExecuteReader
If rdr.HasRows Then
While rdr.Read
[code]...
The error I get is:
SQL Server Compact does not support calls to HasRows property if the underlying cursor is not scrollable.
So how am I supposed to check if data exists before actually reading the DataReader?
EDIT:the whole code:
Dim con As New SqlCeConnection(ConfigurationManager.ConnectionStrings("MyConnectionString").ToString)
Dim cm_sel As New SqlCeCommand("SELECT fID FROM Files WHERE fCatID=" & catID, con)
Try
[code]...
I needed to make an application that calculates weekly pay of employees at an hourly rate. The overtime schema is that: hours less than or equal to cutoff1 are paid regular rate. hours over cutoff1 but not exceeding cutoff2 are paid 1.5 times regular rate. hours over cutoff2 are paid double time or 2 times regular rate. [Code] The employee must choose Category A, B or C depending on the amount they have worked. I am completly new to visual basic, I am not sure how to continue with my if and then statements. I must also create the application with 3 radio buttons, where the user clicks either Category a b or c and then buttons which say calculate and clear. [Code]
View 4 RepliesI need to use a select case statement that evaluates PostDiscountCost based on the value 0 to 999.99, 1000.00 to 1499.99, 1500.00 to 2499.99 and one that doesn't fall within the others. The message box's going to be triggered by the vbYes in the confirm exit message box. Im not asking anyone to do it for me, I just have no idea where to start it, if I need to declare anything else and if I'm on the right track. Code Attached.
View 1 RepliesI am writing a program to analyze error logs from an existing application, and I want to consider only lines that have a Date/time stamp at the beginning of each line.( in the format "03/13/08 08:03:58") I am extracting this as a string and want to evaluate it to make sure it is a valid date so I am using "IsDate(Mid$(TextArray(i), 1, 18))". The problem is that IsDate evaluates False even when the string I am passing should be valid (eg. 03/13/08 08:36:59).
[Code]...
Makes the following statement about the code below:
**"The computer evaluates the loop condition in the Do...Loop statment to determine whether the loop instructions should be processed. In this case, the inputsales <> String.Empty condition compares the contenst of the input sales variable to the String.Empty value. As you know the String.Empty value represents a zero length, or empty, string if the inputsales variable is empty, the loop condition evaluates to True and the computer process the loop instructions. *If on the other hand the inputsales variable is not empty, the loop condition evaluates to false and the computer skips over the loop instructions.
Based on the code I think it is the opposite: ...that while the inputsales value is not empty it should evaluate to true and process the loop and if it is empty it should evaluate to false and skip the loop?
See below.
Option Explicit On
Option Strict On
Imports System.Globalization
[CODE]...
i am using VS 2008 and just started to work with XAML and WPF. while opening in page(.xaml) in design mode i'm getting the error like this "Only TrueType fonts are supported and this is not a TrueType font".
View 7 RepliesI know that
Public Incognito As Boolean
is a variable called "Incognito" that is class-wide that is a boolean.My question is that is there a form-wide variable form that can like communicate with different forms. So if a variable in form1 is "True" than, how can you make a variable in form2 turns to "True" too?
I wanted to create my own type that acts like the Boolean type, except I wanted to use Yes and No instead of True and False.I kind of got close but it wasnt exactly what i was going for here's what i have:
[code]...
so i have to use an integer when i dim it like:dim b as MyBool = 1 then when you look at it in the watch window b = {Yes} so i could settle for that, but with a boolean you can do this:dim b as Boolean without setting it to anything it defaults to False mine however, is Nothing. 2 things: 1. How can i get mine to default to No 2. How can i make it work like this: dim b as MyBool = Yes instead of having to use the integer this is not a requirement for anything I just wanted to know how to do it
This is probably a basic question, but I have never used this syntax before. Can someone tell me in detail how this expression evaluates to true? [Assuming IsOdd is a boolean type].
Dim i As Integer = 3
IsOdd = (i And 1) = 1
The expression 3>6 AndAlso 7>4 evaluates to
A. True B. False
The expression 4>6 OrElse 10<2*6 evaluates to
A. True B. False
The expression 7>=3+4 OrElse 6<4 AndAlso 2<5 evaluates to
A. True B. False
The VB code below assigns True value assign to the function. But when I convert to C#, I am getting an error like we can not assign True to a method. How can I assign true to the method in C#. This is my VB code:
Private Function KeyOK(ByVal sKey As String) As Boolea
KeyOK = True
sKey = Trim(sKey)[code]......
I'm pretty new to Vb so I'm not sure of all the correct terminology etc.
Private Sub Add_mousedown(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Add.MouseDown
Dim Addition As Boolean
[code].....
I have an many class with BeginDate and EndDate properties, I want to build generic method that return one object as List of the same type but with BeginDate=EndDate. [Code], but I faced a problem that Type.IsGenericTypeDefinition of my classes is false. How can I set it to true?
View 2 RepliesI've got this function which converts wav files to mp3. I call this from my button_click handle. The thing is, when the conversion is started, the rest of the code in the button_click handler continue, while the conversion is happening in a different thread. Now, I need the rest of the code in the button_click handle so continue to try until a boolean is true, so that I know that the conversion is done before the rest of the code continues. I've tried using Do While but it didn't seem to do the trick. Perhaps it's just me though..
View 2 RepliesI'm trying to make a textbox at runtime, Dim t as Control
t = New Textbox
t.Multiline = True
t.Size = New Size(300,120)
Form1.Controls.Add(t)
I found out that you can only size a textbox when Multiline is set true. And that's the problem. When I use t.Mutiline = true I get the error " 'multiline' is not a member of 'system.windows.forms.control' "
I've searched the internet for hours without result.
I have the function below which I call onload, I want to be able to check the checkbox (chkactive) if the ProjectStatus is set to True, how can I do that please.[code]
View 4 RepliesI'm reading in a RTF file that I want to search by either using WholeWord or MatchCase search options.
atm I have this:
If (chkWhole.Checked = False) And (chkMatch.Checked = False) Then
'ERROR - MUST SELECT A SEARCH OPTION
[code].....
I know I'm being quite pedantic here. But, what is the right way to get a true 50/50-chance with a generated random number? Say, to simulate the flip of a coin. [code] I know this difference is close to nothing, but I'm doing some calculations on bell curves, in such a way that it requires true 50/50-chance.
View 33 RepliesI am using a TextBox for DoDrop right now but I noticed AllowDrop for Form1 my question is how would I need to go about doing away with the TextBox and just use Form1 drop to assign a file path?
View 15 RepliesI have a form which creates a new school talk appointment. In my database, there is a column called 'active' which is boolean (true or false). Then everytime I creates a new school talk appointment and added it to database, the active is automatically set to 'false'. how to make it set to 'true' instead?
View 10 RepliesI have a Listview listing multiple files with the following code
Dim index As Int16 = 0
For Each Item As String In NewFilenames
ListView2.Items.Add(Item.Substring(Item.LastIndexOf("") + 1), index)
index = index + 1
Next
I need to set all the checkboxes to true somewhere in this statement.
I am writing the code in the class to create the strings. I want the value to returns as true if the strings in the class are matched with two numbers or more, but if the if the strings in the class are not matched with first two numbers or not then returns the value as false.[code]....
View 4 RepliesI have a group box set as false but when I click on radiobutton3 i want it to show at the bottom:
if radiobuttion3.checked the
radiobutton4.enabled = true
end if
but this doesn't show up my second group box when the program is running.
I did this once before but I can't find the code where I did it. I have 4 checkboxes and I want to assign them each a value like:
[Code]....
I've searched the net and even scanned 3 different computers that may contain that source code and have not had any luck finding it.
I have a Group Box Set as false but when i click one Button I want it to Show as True so i have [code] But is not Showing up when i run the program, is this the right code?
View 1 RepliesIs there anyway for a form to become in focus.. basically something like Me.inFocused = True, In order to print a form, it must be visible and in focus, so I need to focus on it without the user having to click it so that I can send the form to a printer
View 1 Repliesi am grabbing text from google textbox with this code
Dim text As String = WebBrowser1.Document.All("q").GetAttribute("value")
TextBox1.Text = text
and i wanted to know if there is a code where it can search for the id "q" and if it doesn't exists then do nothing but if it does then
Dim text As String = WebBrowser1.Document.All("q").GetAttribute("value")
TextBox1.Text = text