value from txtBox

value from txtBox

• nomad98736

  Yes, you have to declare a variable "test" of type Decimal before you can call TryParse...

  Best regards,
  Johan Stenberg

  
  
  

• soumyac

  Remove the "out" from your TryParse call:

  Dim success As Boolean = Decimal.TryParse(txtFcprober.Text, out test)

  Should be:

  Dim success As Boolean = Decimal.TryParse(txtFcprober.Text, test)

  Best regards,
  Johan Stenberg

  
  
  

• PeteCarterGreenan

  hi,

  no, it will be string what is the type that you use for variablename . if its integer you can use Dim variableName as integer = integer.parse(txtbox.text); if its any numeric type use the type.parse(string)

  hope this helps

  
  
  

• KanishK

  for all your decimal variables you can use

  fcprober = decimal.parse(Me.txtFcprober.Text)

  if the textbox.text contain anything other than decimal number like letters for example it will give you exception

  other wise you can use tryparse it return a boolean represent the sucessfullness of the conversion for example

  dim fcpropber as decimal

  dim success as boolean = decimal.tryparse(txtFCprober.text,out test)

  Edit

  previous line was wrong it suppose to be like this

  dim success as boolean = decimal.tryparse(txtFCprober.text,fcprober)

  end edit

  if the conversion was made successfully it will set Fcprober equal to the value if not it will set it equal 0.0 and success will false

  if not success = true then

  messagebox.show("plz enter numeric value in this feild")

  txtFCprober.focous()

  end if

  hope this helps

  
  
  

• Dean Hiller2

  So hier are my codes:

  Dim username As String

  Dim filtertyp As String

  Dim lotnumber As String

  Dim fcprober As Decimal

  Dim cdev_soll As VariantType

  Dim cdevtol_soll As VariantType

  Dim cdev_soll_diff_mhz As Decimal

  Dim cdevtol_soll_diff As Decimal

  Dim lowerlimit_soll As Decimal

  Dim fcsoll As Decimal

  Dim upperlimit_soll As Decimal

  username = Me.txtName.Text

  lotnumber = Me.txtLotnumber.Text

  filtertyp = Me.txtFiltertyp.Text

  fcprober = Me.txtFcprober.Text

  cdev_soll = Me.txtCDevsoll.Text

  cdevtol_soll = Me.txtCDevtolsoll.Text

  cdev_soll_diff_mhz = Me.txtCDevdiffsoll.Text

  cdevtol_soll_diff = Me.txtCDevtoldiffsoll.Text

  lowerlimit_soll = Me.txtLowerlimitsoll.Text

  fcsoll = Me.txtOptimafcsoll.Text

  upperlimit_soll = Me.txtUpperlimitsoll.Text

  and i become this error massage:

  Invalid conversion of the character sequence in type decimal

  can some1 help me to solve this problem pls

  cheers,

  spike

  
  

• PoKemonInstructor

  thx johan, sorry it was in C# and i forgot to remove "out test" it will not work like that , it suppose to be

  Dim success As Boolean = Decimal.TryParse(txtFcprober.Text, fcprober)

  hope this helps

  
  
  

• JoelBarish

  MS Johan Stenberg wrote:

  Yes, you have to declare a variable "test" of type Decimal before you can call TryParse... Best regards, Johan Stenberg

  as first thx all for great helping :D

  so i alredy declared a variable "test" as decimal and succes as boolean. When i start the programm and if i nothing enter in txtFcprober-Textbox i become this error message:

  The input character sequence has the wrong format.

  in the line:

  fcprober = Decimal.Parse(Me.txtFcprober.Text)

  Here is the part of codes:

  Dim username As String

  Dim filtertyp As String

  Dim lotnumber As String

  Dim fcprober As Decimal

  Dim cdev_soll As Decimal

  Dim cdevtol_soll As Decimal

  Dim cdev_soll_diff_mhz As Decimal

  Dim cdevtol_soll_diff As Decimal

  Dim lowerlimit_soll As Decimal

  Dim fcsoll As Decimal

  Dim upperlimit_soll As Decimal

  Dim test As Decimal

  username = Me.txtName.Text

  lotnumber = Me.txtLotnumber.Text

  filtertyp = Me.txtFiltertyp.Text

  fcprober = Decimal.Parse(Me.txtFcprober.Text)

  cdev_soll = Decimal.Parse(Me.txtCDevsoll.Text)

  cdevtol_soll = Decimal.Parse(Me.txtCDevtolsoll.Text)

  cdev_soll_diff_mhz = cdev_soll * fcprober / 1000000

  cdevtol_soll_diff = cdevtol_soll * fcprober / 1000000

  fcsoll = fcprober + cdev_soll_diff_mhz

  upperlimit_soll = fcprober + cdev_soll_diff_mhz + cdevtol_soll_diff

  lowerlimit_soll = fcsoll - cdevtol_soll_diff

  Me.txtCDevdiffsoll.Text = cdev_soll_diff_mhz

  Me.txtCDevtoldiffsoll.Text = cdevtol_soll_diff

  Me.txtOptimafcsoll.Text = fcsoll

  Me.txtLowerlimitsoll.Text = lowerlimit_soll

  Me.txtUpperlimitsoll.Text = upperlimit_soll

  Dim success As Boolean = Decimal.TryParse(txtFcprober.Text, test)

  If Not success = False Then

  MessageBox.Show("Please enter a numeric value in this field!")

  txtFcprober.Focus()

  End If

  Maybe couse i use first time a new version of VB but i think the old version was symple to use :D

  
  

• Adam West

  thx for fast reply.

  buit i will to take numbers as values. in older version if i type variablename = txtboxname.text wasn’t same like variablename = me.txtboxname.value .

  with variablename = txtboxname.text will be as number if i type number in box

  
  

• Seth Cohen

  MS Johan Stenberg wrote:

  Dim success As Boolean = Decimal.TryParse(txtFcprober.Text, test)

  I already removed but i become errorr:

  The name "test" was not defined.

  shall i have to declare a variable with name "test" or...

  thx,

  spike

  
  

• Joel McCormick

  i changed it but i become still error (if is nothing in this field) :(

  "The input character sequence has the wrong format."

  in line:

  fcprober = Decimal.Parse(Me.txtFcprober.Text)

  
  

• ShubertAtEastridge

  There are two flavours of the Parse function; the Parse that returns the value is successful, but throws an exception if it fails, and the TryParse, where you have to provide the variable that you want the function to "fill in" with the parsed value, and that returns true if the function succeeds, and false if the function fails.

  So, when would you choose one over the other I would use the Parse function if I "trusted" the data that I was about to convert (I really didn't expect the parse to fail) and use the TryParse if I thought that it was likely that the string that I was about to convert was of the wrong format.

  This measn that at any point where I get data directly from the user (such as is the case here) I would use TryParse (you can't trust users )

  If you use the Parse function, you probably want to put it in a Try/Catch block and add appropriate error handling if the conversion fails.

  Best regards,
  Johan Stenberg

  
  
  

• Michiel1978

  As first thank you shakalama and to you johan for helping

  With tryParse i solved the problem (just for info if some1 have a same trouble)

  Just the last question :

  If i will to make for every textbox, where user entering information, a if-function like:

  Dim success As Boolean = Decimal.TryParse(txtFcprober.Text, fcprober)

  If Not success = True Then

  MessageBox.Show("Please enter a numeric value in this field!")

  txtFcprober.Focus()

  End If

  shall i have to just giving the codes one behind the other before END SUB or it be there a better place

  
  

• Exitboy

  As first thx for helping :D

  It works better but i have just problem with this part of code

  shakalama wrote:

  dim success as boolean = decimal.tryparse(txtFCprober.text,out test)

  I wrote it exactly but it didnt work:

  Dim success As Boolean = Decimal.TryParse(txtFcprober.Text, out test)

  If Not success = True Then

  MessageBox.Show("Please enter numeric value in this field!")

  txtFCprober.focus()

  End If

  
  

• nguyenkiem

  variablename = txtboxname.Text

  lmao

  
  
  
• value from txtBox