Visual Basic 2010.
Dim selection As String = ListBox1.SelectedItem
Dim url As String = Split(selection, " - ")
Form1.WebBrowser1.Navigate(url(1))
I want to convert the URI (Value of type '1-dimensional array of string' cannot be converted to 'string') to a string. How would I do so?
(The selection variable is something like "Title - URL")
Thanks!
The error is on Split(selection, " - ")
May be your error is at Getting the Split Parts of the Selection to the Url, where you have used normal string instead of One-Dimensional Array Declaration.
Split function will return array of string. But you are trying to assign its value to "string". To declare a array use the below code
Dim url() As String = Split(selection, " - ")
To know about vb array refer the link.
http://www.startvbdotnet.com/language/arrays.aspx
Also one wise way to store url in ListItem is, Set the URL in Value field and Display text in Text field. So that, you can retrieve url from value easily without any string processing.
Related
What I want to do is be able to remove a section of a string and use the remaining portion of it to add to a Combobox.
Dim randString As String = ""
textbox.text = "(Remove this) - Keep this"
randString = textbox.text.... ' Trim/Split the first portion off somehow?
combobox.items.add(randString)
' Result should look like " - Keep this"
I've tried Trim/Split without any luck. Could anyone point me in the right direction? Thanks.
If you just want to remove a portion of the string, you can use the Replace function:
randString = Replace(textbox.text, "(Remove this)", "")
You can put any string variable in as the second argument.
how can i get the first value in a text box and place it to a label. Example, I want to get the word "look" in the textbox that I input was "look like".
You could use substring, this will split the string or aka your textbox.
This takes two params, The starting index of the string and the 2nd param is the length. I have put str.indexof in the 2nd param to get the index of where the space is.
dim str as string
Label1.Text = str.Substring(0, str.IndexOf(" "))
This code is not tested, I only used visual basic for a little bit when i was 12.
you can simply split the value by " " space and take the first one from result array
if(!String.IsNullOrEmpty(textBox1.Text))
{
lable1.Text = textBox1.Text.Split(" ").first();
}
textboxValue = Textbox.Text;
str = textboxValue.Split(" ").first();
I have a ComboBox which I assign to a variable:
Dim var as String = ComboBox1.SelectedValue
Dim name As String = var.Split(",")
This gives me the error
Value of type '1-dimensional array of string' cannot be converted to String
Any ideas as to where I'm going wrong?
Split returns an array of strings. Your variable needs to be changed to an array, not just a single string.
My VB is a bit rusty, but I think you have to make name an array:
Dim name() As String = var.Split(",")
name needs to be declared as an array.
dim name() as string = var.split(",")
The split() method will break up the string based on the given character and put each newly created string into an array and return it.
This is what your error message is telling you:
Value of type '1-dimensional array of string' cannot be converted to String
The method returns an array of string, but your trying to put it into just a string!
EDIT: In response to your answer...
So far you've managed to split the string yourself with the split method. To output this to your message box, you need to concatenate the two elements in the proper order:
msgbox(name(1) & " " & name(0))
Notice I indexed the array twice! Element 1 is the first name, element 0 is the last name. Remember you got this name in lname,fname format. Passing the array itself doesn't make sense! Remember, a datatype is not equal to an array of that type, they are two different things. Therefore a string is not compatible with a string array. However, each individual element of the array is a string, and so each of those are compatible with the string type (because they're the same thing)!
Dim var As String = ComboBox1.SelectedValue
Dim temp() As String = Split(var, ",", -1, CompareMethod.Binary)
Dim name As String = temp(0)
Or maybe "name" isn't an array and the goal is to populate "name" with everything up until the first comma, in which case the fix would be:
Dim name as String = var.Split(",")(0)
Note: assumes that var is not Nothing.
I am using VB.NET code.
I have got the below string.
http://localhost:3282/ISS/Training/SearchTrainerData.aspx
Now I want to split the above string with "/" as well. I want to store the value SearchTrainerData.aspx in a variable.
In my case
Dim str as String
str = "SearchTrainerData.aspx"
What would be the code which will split the above string and further store it in a variable?
Try to use the function String.Split.
Your "string" is obviously a URL which means you should use the System.Uri class.
Dim url As Uri = New Uri("http://localhost:3282/ISS/Training/SearchTrainerData.aspx")
Dim segments As String() = url.Segments
Dim str As String = segments(segments.Length - 1)
This will also allow you to get all kinds of other interesting information about your "string" without resorting to manual (and error-prone) parsing.
The Split function takes characters, which VB.NET represents by appending a 'c' to the end of a one-character string:
Dim sentence = "http://localhost:3282/ISS/Training/SearchTrainerData.aspx"
Dim words = sentence.Split("/"c)
Dim lastWord = words(words.length - 1)
I guess what you are actually looking for is the System.Uri Class. Which makes all string splitting that you are looking for obsolete.
MSDN Documentation for System.Uri
Uri url = new Uri ("http://...");
String[] parts = url.Segments;
Use split(). You call it on the string instance, passing in a char array of the delimiters, and it returns to you an array of strings. Grab the last element to get your "SearchTrainerData.aspx."
I am refactoring some legacy code. The app was not using querystrings. The previous developer was hard coding some variables that the app uses in other places.
Like this using VB.NET
so.Cpage = "ContractChange.aspx"
My question is can I programatically set this value and include the current querystring?
I want so.Cpage to be something like ContractChange.aspx?d=1&b=2
Can I do this with the request object or something? Note, I don't need the domain.
To get the current query string you would simply do something like the following:
Dim query as String = Request.QueryString("d")
This will assign the value of the "d" querystring to the string variable "query". Note that all query string values are strings, so if you're passing numbers around, you'll need to "cast" or convert those string values to numerics (be careful of exceptions when casting, though). For example:
Dim query as String = Request.QueryString("d")
Dim iquery as Integer = CType(query, Integer)
The QueryString property of the Request object is a collection of name/value key pairs. Specifically, it's of type System.Collections.Specialized.NameValueCollection, and you can iterate through each of the name/value pairs as so:
Dim coll As System.Collections.Specialized.NameValueCollection = Request.QueryString
Dim value As String
For Each key As String In coll.AllKeys
value = coll(key)
Next
Using either of these mechanisms (or something very similar) should enable you to construct a string variable which contains the full url (page and querystrings) that you wish to navigate to.
Try this:
so.Cpage = "ContractChange.aspx?" & Request.RawUrl.Split("?")(1)
In VB.Net you can do it with the following.
Dim id As String = Request.Params("RequestId")
If you want to process this in as an integer, you can do the following:
Dim id As Integer
If Integer.TryParse(Request.Params("RequestId"), id) Then
DoProcessingStuff()
End If
try this
Dim name As String = System.IO.Path.GetFileName(Request.ServerVariables("SCRIPT_NAME"))
Dim qrystring As String = Request.ServerVariables("QUERY_STRING")
Dim fullname As String = name & "/" & qrystring
Not sure about the syntax in VB.NET but in C# you would just need to do
StringId = Request.QueryString.Get("d");
Hope this helps.