Validating multiple text fields

Posted by / 28-Mar-2017 07:06

To see what I mean, place Option Strict On at the top of your code above the Class I just pasted your code into a project and made mistakes in each of the fields per your If Statements and received a messagebox listing all the problems. It could be something with the input as you are assuming a lot of conversions that Option Strict ON would not allow and these could be mis-interpreted by the compiler. OK Exit Sub Else Msg Box("The following errors were found in your input:" & vb New Line & error Str) End If End Sub End Class I just pasted your code into a project and made mistakes in each of the fields per your If Statements and received a messagebox listing all the problems. It could be something with the input as you are assuming a lot of conversions that Option Strict ON would not allow and these could be mis-interpreted by the compiler. Set Error(Text First Name, "Name Cannot Contain Spaces and cannot be Zero length") e. Set Error(Text First Name, "") End If End Sub Private Sub Form4_Load(By Val sender As Object, By Val e As System. The form has First Name, Last Name, Course and Email text box fields. Text array Add New Student = Join(array Record, ",") Me. OK End Sub 'in the click event Dim str As String = "" str = Is Valid() If str = "" Then ' Its all valid so do w/e here Else msgbox("The following fields are invalid: " & str) End If 'the Is Valid Sub. To see what I mean, place Option Strict On at the top of your code above the Class Firstly try not inputting anything at all. First/Last Name must have no spaces, Course must consist of a three letters and two numbers in that order and nothing else(I want to avoid the use of masked text box), and Email must have the "@" sign and a dot. add If statements for the fields you want to validate Private Function Is Quick Admission Valid() As String 'return string value containing the missing pieces if it is invalid. The major field validation with Substring() is messed up. Text, " "c) = True Then result = result & "- First Name field has spaces" & vb New Line End If If In Str(txt First Name. Text)) = True Then result = result & "- First Name field has numbers" & vb New Line End If 'last name field validation If txt Last Name. Length = 0 Then result = result & "- Last Name field is empty" & vb New Line End If If In Str(txt Last Name.

The above code will cause the Validating event for each of your controls to be raised, ensuring that all the controls get validated, before the dialog is closed or the data is saved... None Exit For End If End If Next Note this version does not validate controls nested within other container controls, such as Group Boxes... I heard using the validated event was the way to go cause it would show an icon next to the field that needs attention or something. I have textbox2 - 8 check to make sure all is filled out Dim c As Control For Each c In Me. Drag an Error Provider control from toolbox onto form. Validating Validate_LName() End Sub Private Sub Validate_LName() If txt LName. Set Error(txt LName, "Required field") _error1 = True Else Error Provider1. New Hire Details ' assume everything on form is Ok... None Exit For End If End If Next Note this version does not validate controls nested within other container controls, such as Group Boxes...

I got the following tip from "Windows Forms Programming in C#" by Chris Sells, from Addison Wesley. Controls If Type Of c Is Text Box Then If CType(c, Text Box). Harlow [MVP - Outlook]" B-Dog, In addition to adding handlers for the Validating event that Terry (OHM) suggested. I heard using the validated event was the way to go cause it would show an icon next to the field that needs attention or something. I have textbox2 - 8 check to make sure all is filled out Dim c As Control For Each c In Me. For details on the Validating event see: your case you can use something like for all 8 text boxes: Private Sub text Box1_Validating(By Val sender As Object, _ By Val e As System. Within your "Accept" button click handler (the "save" button) process each control that Causes Validation to ensure that they are all valid... Controls If Type Of c Is Text Box Then If CType(c, Text Box). Harlow [MVP - Outlook]" B-Dog, In addition to adding handlers for the Validating event that Terry (OHM) suggested. (this gives you the red icon beside the control(s) that is not valid) ' form level variable Private _error1 As Boolean Private Sub txt LName_Validating(By Val sender As Object, By Val e As System. Set Error(txt LName, "") ' don't set _error1=false, cause other validators may have set it somewhere else... _error1 = False ' validate everything again (some control may have never gotten focus) Validate_LName() '^^^repeat for each control you want to validate 'if found an error abort... End Sub HTH, Greg "B-Dog" did it temporarily until I figured out the other way.

Time flies when you don't know what you're doing "B-Dog" B-Dog, In addition to adding handlers for the Validating event that Terry (OHM) suggested. I heard using the validated event was the way to go cause it would show an icon next to the field that needs attention or something. I have textbox2 - 8 check to make sure all is filled out Dim c As Control For Each c In Me. Hope this helps Jay "B-Dog" I couldn't find exactly how to do it, I'm very new at VB but this is how I did it temporarily until I figured out the other way. The above code will cause the Validating event for each of your controls B-Dog, Its "easier" to use the Validating event for Text Box, Validating is inherited from Control, so all controls have a Validating event. Private Sub text Box_Validating(By Val sender As Object, _ By Val e As System. I got the following tip from "Windows Forms Programming in C#" by Chris Sells, from Addison Wesley. End If End Sub '^^^ repeat for each control you want to validate Private Sub btn Accept_Click(By Val sender As System. I heard using the validated event was the way to go cause it would show an icon next to the field that needs attention or something. I have textbox2 - 8 check to make sure all is filled out Dim c As Control For Each c In Me. Drag an Error Provider control from toolbox onto form. Validating Validate_LName() End Sub Private Sub Validate_LName() If txt LName. Set Error(txt LName, "Required field") _error1 = True Else Error Provider1. New Hire Details ' assume everything on form is Ok... None Exit For End If End If Next Note this version does not validate controls nested within other container controls, such as Group Boxes...

Within your "Accept" button click handler (the "save" button) process each control that Causes Validation to ensure that they are all valid...

Within your "Accept" button click handler (the "save" button) process each control that Causes Validation to ensure that they are all valid... I got the following tip from "Windows Forms Programming in C#" by Chris Sells, from Addison Wesley.

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