Introductions And Suggested Reading For 'I Know Enough To Be Dangerous'- Types
Apr 28, 2010
Ive created a few in-house applications using Access, such as an IT Ticket tracking database and a database to store legal case logs, but finally found a project that I knew would completely out-grow Access and Im trying to incorporate my previous knowledge in to Visual Basic/Visual Studio.That being said, do any of you have any suggestions for intermediate-level reading material or tutorials, especially on how SQL Server and Visual Studio mix together? I've picked up a copy of Sams Teach Yourself Visual Basic 2005 in 24 Hours, which isn't too bad but I've had to skip around quite a bit because I'm already pretty familiar with the interface, I just need some more assistance with the code. I've also purchased Murach's Visual Basic 2008, but I haven't cracked that one open yet.At any rate, I look forward to talking with you all.
View 1 Replies
ADVERTISEMENT
Apr 10, 2009
This problem makes it so that when I view the data, any fields with text are blank - only integer values show.
Code:
Dim PathToCsvFiles As String = "\\umpqua\companies\shared\MLImports\"
Dim FileName As String = "Strategy.csv"
[CODE]...
Also it is pipe delimited so I have a Schema.ini
[Strategy.csv]
ColNameHeader=True
CharacterSet=ANSI
Format=Delimited(|)
View 1 Replies
Apr 26, 2011
I'm Using resharper 6 nighty builds and VB.net. I've a big medium project with multiple files that don't follow the code style conventions of my company.I've configured resharper with my own convenctions and It suggest to me the right name for each variable (perfect!).But I can't find any automagic way to make the current name to be replaced with the suggested name.
View 1 Replies
Jul 5, 2009
I'm Using resharper 6 nighty builds and VB.net. I've a big medium project with multiple files that don't follow the code style conventions of my company.I've configured resharper with my own convenctions and It suggest to me the right name for each variable (perfect!).But I can't find any automagic way to make the current name to be replaced with the suggested name.
View 4 Replies
Apr 6, 2012
I have a general question on app.config, or the best way to NOT hard code a SmtpServer.Host = XXXXXXXX setting. I wrote this very simple SMTP texting application and wanted to have the settings not hard code but a form that read or writes to app.config or .ini or registry. my question is the pros and cons? and if anyone hae suggested or a link to sample project that is doing what I'm after. I have a single .exe and am new to vb.net and either want the exe to check for app.config, ini or registry if does not exist to create and then save added config, if the exe runs again it uses the newly created settings.
View 5 Replies
Apr 3, 2009
I have a form that have many text fields and all are being validated, I also added the NiceEdit plugin to be able to format text in my text areas, but it is raising errors like:
A potentially dangerous Request.Form value was detected from the client Now I can simply go to the top of the page and in the page directive add ValidateRequest="false" but this will deprive me from all the validation that I really need, so how can I switch validation OFF for my text areas ???VB.net, ASP.net 3.5, VWD 2008 Express...
View 1 Replies
Dec 8, 2009
I'm creating a text box with auto-suggested. So, it works well. It suggests only first name, but I want it to suggest the full name (first and last name which two different columns). Take a look at the following code behind that worked as expected :
[Code]....
View 1 Replies
Feb 4, 2011
why I am getting the following error? I have debugging enabled.Server Error in '/' Application.A potentially dangerous Request.Form value was detected from the client (strContent="<p>test</p>").
Description: Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted. This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack. You can disable request validation by setting validateRequest=false in the Page directive or in the configuration section. However, it is strongly recommended that your application explicitly check all inputs in this case.
Exception Details: System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (strContent="<p>
test</p>
").
Source Error: The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:
1. Add a "Debug=true" directive at the top of the file that generated the error. Example:
<%@ Page Language="C#" Debug="true" %>
or:
2) Add the following section to the configuration file of your application:
<configuration>
<system.web>
<compilation debug="true"/>
[code]....
View 2 Replies
Nov 8, 2010
I use... $.post("/StoreHtml", { 'html': $("#txtHtml").val(), , function (data) { }); to store html user enters, but method above fails with an "A potentially dangerous Request.Form value was detected from the client". How do I encode the html before sending it? ... and how do I decode it in vb.net?
View 2 Replies
Mar 17, 2010
I'm noticing this error more and more in my error logs. I've read through the questions here talking about this error, but they don't address what I would like to do (see below).
I'm considering three options, in the order of preference:
1) When submitting a form (I use formviews almost exclusively, if that helps), if potentially dangerous characters are detected, automatically strip them out and submit.
2) When submitting a form, if potentially dangerous characters are detected, alert the user and let them fix it before trying again.
3) After the exception is generated, deal with it and alert the user.
I'm hoping one of the first two options might be able to do somewhat globally...I know for the 3rd I'd have to alter a TON of Try-Catch blocks I already have in place. Doable, but labor intensive. I'd rather be proactive about it if at all possible and avoid the exception all together.
Perhaps one approach to #1 would be to write a block of code that could loop through all text entry fields in a formview, during the insert/update event, and strip the characters out. I'm ok with that, but I'd rather not have to heavily alter all my Insert/Update events to accomplish this. Or maybe I just create a different class to do the text checking/deleting, and only insert 1 line of code in each Insert/Update event. If anyone can come up with some example code of any of these approaches that would be a
View 2 Replies
Nov 1, 2009
I have a class with a Property called 'Value' which is of type Object.Value can be of any type, a structure, a class, an array, IList etc.My problem is with the setter and determining whether the value has changed or not.This is simple enough for value types, but reference types and lists present a problem.For a class, would you assume that the Equals method has been implemented correctly, or just assume that the value has changed every time the setter is called?If I did assume it's changed, then perhaps I should assume it for value types as well, so that the behaviour is consistent.
View 2 Replies
Jun 23, 2012
I need to compare two dictionary values if the types stored are equal, this is what i have
if gettype(Args(key)) = gettype(argtypes(key)) then
'' do something
end if
[Code]....
View 1 Replies
Jan 2, 2010
I am working on a project in VB 2008 and need it to do this:Read first line from text file (using Openfile)Enter line into textbox on formDo some other codeThen Read second linefrom text fileEnter line into same text boxand loop until we have gone through text fileI am not sure how to read line by line from text file then enter it in textbox. I can open the Openfile and get the filename and everything, but I just am not sure how to read from it or enter that line into the textbox.Here is what I have, its not much but its a start:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim FileReader As StreamReader
[code]....
View 4 Replies
Aug 27, 2010
I have: Dim nVar1 As Long?Dim nVar2 As Long?Dim nVarSum As Long?nVar1 = Nothing nVar2 = 5 nVarSum = nVar1 + nVar2 I would prefer the result to end with nVarSum being 5, instead of Nothing. I understand if you add something to an unknown value, you will end up with "somthing + unknown" or x+5 will always equal "x+5" not "5" because you are still carrying around that unknown "x". However, how can I effectively treat an unknown or Nothing as a zero for the purposes of addition in this case?(What is basically happening is that the end user is sending us a data file, this code parses that file and then sums together about 15 fields. If the user leaves those fields blank instead of assigning a zero to them, I need to treat it as if it was a zero for this one addition operation, but all the rest of the code needs to continue seeing it as a Nothing value since the user did not ACTUALLY submit zero... they submitted blank or nothing)
View 3 Replies
Apr 5, 2012
In Delphi you can do something like this :
TArray = array[1..3] of byte;
where you can then declare
T2Array = array[1..3] of TArray
[code].....
View 4 Replies
May 26, 2009
C# and VB.NET comes with built in types that maps to the CLR types. Examples are: int (C#) and Integer (VB) maps to System.Int32, long (C#) and Long (VB) maps to System.Int64. What are the best practices for deciding when to use built in types or not to use them (using the System.* structs/classes instead)?
View 7 Replies
Jun 27, 2012
Can Nullable Types be used in VB.NET? If so, is it possible to have a Nullable Integer that I can use with a field that accepts NULL in SQL Server?
View 4 Replies
Jan 7, 2010
Converting types between .Net and VB6?
View 2 Replies
Feb 20, 2010
Gota class i'm finishing up to hopefully have as a tutorial on here very soon about working with wndproc in a class for drive readings. Trying to build a simple select state ment for drives removed based off there hexvalue placment so far i've found &H1(Cd devices) and it appears &H0(Usb tho not found other devices to test yet)
[Code]...
View 1 Replies
Mar 8, 2010
I am trying to have different types of rectangles. I thought something like this would work, but Rectangle is not a class.
Public Class xRectangle
Inherits Rectangle
End Class
What I wanted this for was to remove a selection rectangle from an existing drawing. I have all of the objects to draw stored in a list and I am trying to remove the selection rectangle without removing the object it is covering.
View 4 Replies
Jun 11, 2009
I have a function that accepts a list as the parameter and creates a CSV from the passed list.Currently, the List parameter is of type String i.e.Public Function GenerateCSV(ByVal Source As List(Of String)) As String..My question is, is there a way I could modify the parameter such that it accepts a list of any known type i.e either string, integer etc instead of forcing it accept of type string as I have done above?
View 5 Replies
Aug 25, 2010
I'm converting an Access VBA app to VB.NET. It has dates defined as variants or objects to handle null values. I thought this would be a great chance to use the Nullable type. But I can't get it to work. Either it is inappropriate for what I am trying to use it for, or I am doing it wrong. Anyone know how to use it? Reader is a SqlDataReader.
[Code]...
I was hoping I didn't have to put a lot of If .. Null statements throughtout the code, but that is my only option unless someone has any other idea.
View 11 Replies
Oct 20, 2011
I am writing a vb.net application which calls a webservice method. The webservice method in question accept some 20 parameters, such as (string x, string y, string z.... Integer a, Integer b, Integer c).Its possible that any one of the integers (a b or c) is not purposefully set to a value. However, because Integer is a value type I cant set it to Nothing, thus I default it to -1 when the user has not selected a specific value for those integers. However, the webservice method wants me to pass it Null/Nothing when the user did not initialize those integers (not 0, or -1, it wants Nothing/Null).
How do I give the webservice what it wants short of multiple conditionals, with slightly different calls to the webservice (e.g. if integer a = -1 then call webservice with (x,y,z,Nothing,b,c) etc...)?
View 1 Replies
May 27, 2009
So I have a pretty large application. This app communicates with hardware using a RS422 protocol. Now I'm working on the same app, except it will be using TCP/IP to communicate with the hardware. So this is using different code to do this.But I don't want to write two different applications, because that is two apps I would have to keep updated both of them. The apps are the same exept for the way they communicate with the hardware. Now I can limit the change down to 1 form, all the other forms would stay the same.
View 5 Replies
Sep 27, 2010
I understand that different data types have different uses, String for text, Integer for numerical ect. However, if the Object type can be used for ALL types and supportive of everthign then why should i worry about using correct data types such as string and integer if i can just use "Object" for them all and it will work.I could do
Dim Test as Object = "John"
or i could do
Dim Test as String = "John"
They both do the same thing; there must be something very important im missing here but can only think of one thing that it could be; Memory Management.I think that by using a type such as object may take up more memory than using string?
View 4 Replies
May 6, 2011
I often use VBA to automate internet explorer and interact with web sites.I can find links on regular URLs I navigate to, fill in forms on them, etc.But I don't know what these types of windows are that come up or how to get a hold of them to click links on them or enter text in their forms if there is any. It comes up then grays out the screen it came from. It looks like its some java popup or something. I'm not interested in the site this is from, its just an example of one to show what I mean. I've been searching and looking but can't figure it out.
View 5 Replies
Apr 21, 2011
Which parts of C# .NET framework are actually parts of the language? There are some features of C# that require specific type (the type has to implement System.IDisposable). Other features are based on patterns (any type that has something that looks like a method called Select() with the proper signature).What is the minimum set of types that C# requires from the library (the former case above)? How does that differ from other languages like VB.NET and F#?
View 1 Replies
Apr 20, 2010
Public Function CastToT(Of T)(ByVal GenericType(Of Object) data) As GenericType(Of T)Return DirectCast(data, GenericType(Of T))End Function
The above clearly does not work. Is there any way to perform this cast if I know that all objects inside data are in fact of Type T?
View 2 Replies
Jun 8, 2010
I'm writing a program and currently have 4 lists called Palette1, Palette2, Palette3, Palette4.Each contain 15 list items of Color type.I was hoping to create an array of lists but have been unsuccessfull in doing so.[code]
View 6 Replies
Jul 29, 2010
I am building an ASP.NET application that needs dynamic tables. That's another issue that I've already posted about (and gotten a pretty good response!). Now, I'm running into another issue - I want to add new rows to my table, but given that I will have 10-12 tables on one page, each containing different objects in their rows (text boxes, check boxes, etc.) I need a way of simply generically adding a new row that has the same objects as the first row in the table. Here's my code:
Private Sub AddTableRow(ByRef originalTable As System.Web.UI.WebControls.Table)
Dim originalRow As System.Web.UI.WebControls.TableRow = originalTable.Rows(1)
Dim insertingRow As New System.Web.UI.WebControls.TableRow[code]......
Stepping through with a debugger, I see that this strategy is working - but the additional table row still doesn't appear...and still does when I do this statically.
View 1 Replies
