How to display only alphabets?

[salo]

hi... can anybody help me for displaying only alphabets in textboxes in visual studio 2005[asp.net]

i gave[a-zA-Z] in validation expression for regular expression validation...... but still im not getting ....if i giv only aphabets also it showing error......

And aslo i want the expression for displaying alphabets and space

[shweta123]

Hi,

Check for the ascii values in the KeyPress of Textbox

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress

If (Asc(e.KeyChar) >= 65 And Asc(e.KeyChar) <= 90) Or (Asc(e.KeyChar) >= 97 And Asc(e.KeyChar) <= 122) Or Asc(e.KeyChar) = 32 Then
''''''''''''''Process it if want
Else
''''''''''''''If other than alphabets or space make it blank
e.KeyChar = ""
End If

[salo]

Hi,

Check for the ascii values in the KeyPress of Textbox

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress

If (Asc(e.KeyChar) >= 65 And Asc(e.KeyChar) <= 90) Or (Asc(e.KeyChar) >= 97 And Asc(e.KeyChar) <= 122) Or Asc(e.KeyChar) = 32 Then
''''''''''''''Process it if want
Else
''''''''''''''If other than alphabets or space make it blank
e.KeyChar = ""
End If

it is webform so keypressed option is not coming and is their any other expression for validation expression

[shweta123]

Hi,
Are you using Vb.net?
try this code

Dim objAlphaPattern As New Regex(("[^a-zA-Z]"))

If (objAlphaPattern.IsMatch(TextBox1.Text)) = True Then
TextBox1.Text = ""
End If

[ajl]

You can use ASP.NET's CustomValidator control to validate the textbox control.

<asp:TextBox ID="textbox1" runat="server" CausesValidation="true" ></asp:TextBox>
 <asp:CustomValidator ID="cvalidator" runat="server" ControlToValidate="textbox1" ErrorMessage="Not a letter or whitespace" ></asp:CustomValidator>
 
If you are using c#, validate function goes as below
<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
      cvalidator.ServerValidate += new ServerValidateEventHandler(txtLetter);
 
    }
    protected void txtLetter(object sender, ServerValidateEventArgs e)
    {
 
        for (int i = 0; i < e.Value.Length; i++)
        {
            if (char.IsLetter(e.Value, i) || char.IsWhiteSpace(e.Value, i))
                e.IsValid = true;
            else
            {
                e.IsValid = false;
                break;
            }
 
        }
 
    }
</script>

[Inthu]

[a-zA-z]in this place wrtie code like ^[a-zA-Z]+$ or ^[a-zA-Z]+ its means access more character if u use [a-zA-Z]this code it access only one character u enter one character its not display error i hope its usefull for u