Getting Rid Of Unwanted Characters In The Textbox?
Feb 17, 2011
I am trying to show the square root of the number entered in the textbox. when the user presses Q (Uppercase), the square Root should be shown (in the textbox). I did manage to get the sqaure root, but the problem is that when I press Q the Letter Q is also typed in. For example, if I enter 25 in the textbox and press Q then I get Q5 as the result. Is there any work around to this problem ? Below is the code that I have used.
Private Sub Textbox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
If e.KeyChar = Chr(81) Then '81 for Letter Q
Dim root As Double = Math.Sqrt(Val(TextBox1.Text))
My program paste lots of stuff to a text box. Is it possible to replace every character that is not a number or a point to nothing? It may get lots of weird character there so is here way to replace them to �� and keeping numbers?
I know how to TextBox1.Text = TextBox1.Text.Replace("%", "") But its too many simbols to list, Can it be done easier?
I am trying to download chinese data from database to excel. But data is coming with different charecters in Excel like this Here is the my code for download excel. I don't understand what's wrong in my code.
I am using a collection to store data from a text file which I am letting the user load and I am using the .split to split and sort the data into alphabetical order and remove repeating words.However, I am having a problem removing unwanted characters from the final array. For Example, "This is the text file that I want sorted. It is random text not yet sorted"
This is one of those "seems obvious" as how to do, but came across interesting side effect in implementing. I'm trying to keep two text boxes syncronized when information is updated. In this example, I will be using txtStartDate and txtEndDate. If the txtStartDate is changed, then the txtEndDate should should be updated. Likewise, if the txtEndDate changes, I want the txtSartDate to be updated. The side effect I'm comming across is that when I set them up under the TextChanged event for both, the events seem to retrigger against each other indefinately (endless loop?). Am I using the wrong event? Is this a task for a delegate?
I'm using VB 2005 and MS Access 2000. I have a process that does some "stuff" with the data, re-queries the database, re-populates the form then displays a messagebox indicating that the process has completed. My issue is that after clicking OK in the messagebox, that whatever textbox the cursor was in prior to starting the process, now has all the text in it highlighted. If I don't show the messagebox then this doesn't happen. And if I don't call the process that repopulates the form controls, this doesn't happen. There's no code in the app that selects the contents of the textbox so is there a property somewhere that controls this?
Essentially I am trying to replicate the Windows 7 (In-Windows) activation key TextBox form. The Form where it will auto capitalize letters, remove or deny all non alphanumeric characters except dashes every 5 characters that will be auto-input.I assume this can be done with a fairly complicated replacement Regular Expression but I cannot seem to create one to fit the needs.
This is an Example of what I have right now, but it creates an infinite loop as it removes all characters including dashes, than adds a dash, which changes the text and removes the dash again.
I have two textboxes. I type in one of them and the text gets copied in real time into another textbox. There is one catch. I need to replace specific character with something else.
If I enter a quote " in textbox1, it has to be replaced with " in textbox2.
I started with something like the below code, but obviously this does not work (tried different stuff - this is for demonstration only). In the example below 'a' represents " , and 'b' represents "
Private Sub TextBox1_KeyUp(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.KeyUp TextBox2.Text = TextBox1.Text
I wanna type 140 characters in asp.net textbox with multiline when i type in textbox then the characters will be decreaded means if i type two characters in textbox then in label the available characters will be shown is 138..using vb.net
I wanted to set a maximum limit of characters of textbox in the properties but i can't find where it is located unlike in vb 6.0 you can set the characters in maxlength...
I have a a multiline textbox, I want to take each and every character that the user enters and on a button press it replaces them with a set of characters, like:
i with x75d
or:
f with g8r
but the only way i have figured out how to do something like this is using a character in between each character and the split method, like:
Dim input() As String Dim txt as String Private Sub Encode_Click(ByVal sender As System.Object, ByVal e As
i would like to limit a textbox input to 20 characters and only one line to input the characters.. i really have no idea where to start. i did see some forum threads, except they're for different options other than the option i need.. trujade.so much work to do and so many choices to choose from...
I have a textbox that is for National Insurance Number, so I want the first 6 characters to be letters and the last to be a number. I know I need to use the Is Numeric function but I cannot get it to work.
I am creating a converter program (lengths, weights and such), basically just for the learning process because I still find myself very new to this.Well it's like this, I have a textbox where the user is supposed to write the value of the unit he/she wants to convert. As we all know there is a possibility to write in many weird strings which the program later on result in a big error. I recently managed to get rid of dots, because the program couldn't convert if there were a dot among the numbers "." (commas "," works great!). And now there are other types of errors I need to get fixed. I will make a short numeric list.
1. I wonder if it's possible to make dots "." to mean the same thing as a comma ",".
2. I also wonder if i could disable letters a-z or like -#@%&]?! and so on, i just want the basic 0-9 with a coma or dot.
3. I tried to make a Msgbox that tells the user when he/she has done an overflow, a number to big for the program to handle, for example [Observe the code is also trying to prevent the user from writing a minus "-":
(textbox1_textchanged) If TextBox1.Text.Contains("-") Then TextBox1.Text = TextBox1.Text.Replace("-", "")
[code]....
The minus thingy works great, but the 9999999... code, it always creates problems so I have commented it out for now until I know how to handle it.
4. Even though I got rid of the dot "." problem, the user is still able to write more then one comma, and I also want to get rid of that. The code I use right now for the "disable dot problem" is:
(textbox1_keypress) If e.KeyChar = "," Then If TextBox1.Text.IndexOf(",") > -1 Then
I am building a form and i want to prevent certain characters from being typed in a textbox? I want to disable the " and ' characters in some of my textboxes
I want to limit the Textbox to a range of characters in VB. For example, I want the user to enter strings from 5-7 characters. I know how to limit the Textbox to a certain number of characters by MaxLength but that will give him the option of writing just 3 or 4 characters which I don't want to allow that from happening.
I have a program that users log their activities during the day in a textbox. I have the following code to print the textbox, but it does not print the tab characters that are in the textbox.
Private Sub PrintDocument1_PrintPage(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage Try
I which to use the text of a textbox to fill another text box. I only want to use the first 5characters of the text. I which not to change the original textbox text.
i am trying to validate a string that has been inputted into a text box so that it checks all of the characters in the text box individually. I have got the code to check the first character...
If Char.IsLetter(textbox1.Text) = False Then MsgBox("Error! Invalide charecters present") Exit Sub End If If
I was just wondering if there is some sort of loop that i can do so that it checks all of the characters in the text box.
If Char.IsLetter(txtCustomerName.Text) = False Then MsgBox("Error! Invalide charecters present in customers name") Exit Sub End If
I'm working on a query where I only want to use the 8 first characters entered in to the textbox. Is there some attribute to textbox that allows me to do this?
