vb.net-2010

How to zoom in a Picturebox with scrollwheel in vb.net

南楼画角 提交于 2019-11-29 02:17:45
I'm using a set of graphics overlays to draw an image inside a picturebox control using the graphics object. I have placed the Picturebox inside a Panel and set the Panel to autoscroll. What I need to know how to do now is use the Mouse scroll wheel to blow up the size of the picture in small increments while maintaining the quality of the image drawn. Anyone know how to do this? When I update with Abdias Software code below, the picture starts out smaller when Sizemode property of picturebox is set to StretchImage. I have a pan feature with the mouse that might be interfering with keeping

how to read pdf file with blank spaces (as it is) line by Line in c#.net using iTextsharp

寵の児 提交于 2019-11-28 14:51:10
I am using iText (for .net) to read pdf files. It reads the document but when there are whitespaces it reads only one space. That makes it impossible to extract data by getting substrings. I want to read data line by line with whitespaces so I know the actual position of text because I want to write the data into a database. The file is a bank statement, I want to dump it into a database for designing a reconciled system, Here is a screen shot of a file Following is the code which I am using For page As Integer = 1 To pdfReader.NumberOfPages ' Dim strategy As ITextExtractionStrategy = New

what is the meaning of the dollar sign after a method name in vb.net

北城以北 提交于 2019-11-27 19:41:14
what is the meaning of the dollar sign after a method name in vb.net like this: Replace$("EG000000", "0", "") Old type notifier - see this Some other old ones: & -> Long % -> Integer # -> Double ! -> Single @ -> Decimal $ -> String Still exist in VB.Net for the sake of backward compatibility... In "classic" VB, there were two versions of the built in-string functions. Let me use Left as an example: Left(s, length) takes a variant as the first parameter and returns a variant . Left$(s, length) takes a string as the first parameter and returns a string . This distinction still exists in modern

How do I set a nullable DateTime to null in VB.NET?

我只是一个虾纸丫 提交于 2019-11-27 03:51:38
问题 I am trying to set up a date range filter on my UI, with checkboxes to say whether a DateTimePicker's value should be used, e.g. Dim fromDate As DateTime? = If(fromDatePicker.Checked, fromDatePicker.Value, Nothing) Yet setting fromDate to Nothing doesn't result in it being set to Nothing but to '12:00:00 AM', and the following If statement incorrectly executes the filter because startDate is not Nothing . If (Not startDate Is Nothing) Then list = list.Where(Function(i) i.InvDate.Value >=

How to open a new form but closing the old one in VB

╄→гoц情女王★ 提交于 2019-11-27 02:47:38
问题 I have a welcome to my application as it loads up, but then need to have that form close and login form open when the continue button is hit. My code: Me.Close() Dim Login As New Form Login.Show() When I click the button it only closes the welcome form and then ends the application. If you can help thanks! :) 回答1: You can set the properties of the project to select "When last form closes" in the shutdown mode dropdown Update:- "Project" menu -> 'YourApp' Properties... -> Application Tab find

what is the meaning of the dollar sign after a method name in vb.net

痞子三分冷 提交于 2019-11-26 19:57:30
问题 what is the meaning of the dollar sign after a method name in vb.net like this: Replace$("EG000000", "0", "") 回答1: Old type notifier - see this Some other old ones: & -> Long % -> Integer # -> Double ! -> Single @ -> Decimal $ -> String Still exist in VB.Net for the sake of backward compatibility... 回答2: In "classic" VB, there were two versions of the built in-string functions. Let me use Left as an example: Left(s, length) takes a variant as the first parameter and returns a variant . Left$