Some common regular expressions are shown here:
Common Regular Expressions
ASP.NET TextBox.MultiLine maxlength
Add following javascript
function Count(text,long)
{
Your textbox code should look like
Solution Number 2 for
ASP.NET TextBox.MultiLine maxlength
Another way to achieve this is regular expression. You can add following regular expression validate on asp text box.
quot; runat="server" />Common Regular Expressions
| Field | Expression | Format Samples | Description |
|---|---|---|---|
| Name | ^[a-zA-Z''-'\s]{1,40}$ | John Doe O'Dell | Validates a name. Allows up to 40 uppercase and lowercase characters and a few special characters that are common to some names. You can modify this list. |
| Social Security Number | ^\d{3}-\d{2}-\d{4}$ | 111-11-1111 | Validates the format, type, and length of the supplied input field. The input must consist of 3 numeric characters followed by a dash, then 2 numeric characters followed by a dash, and then 4 numeric characters. |
| Phone Number | ^[01]?[- .]?(\([2-9]\d{2}\)|[2-9]\d{2})[- .]?\d{3}[- .]?\d{4}$ | (425) 555-0123 425-555-0123 425 555 0123 1-425-555-0123 | Validates a U.S. phone number. It must consist of 3 numeric characters, optionally enclosed in parentheses, followed by a set of 3 numeric characters and then a set of 4 numeric characters. |
| ^(?("")("".+?""@)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])@))(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$ | someone@example.com | Validates an e-mail address. | |
| URL | ^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&%\$#_]*)?$ | http://www.microsoft.com | Validates a URL |
| ZIP Code | ^(\d{5}-\d{4}|\d{5}|\d{9})$|^([a-zA-Z]\d[a-zA-Z] \d[a-zA-Z]\d)$ | 12345 | Validates a U.S. ZIP Code. The code must consist of 5 or 9 numeric characters. |
| Password | (?!^[0-9]*$)(?!^[a-zA-Z]*$)^([a-zA-Z0-9]{8,10})$ | Validates a strong password. It must be between 8 and 10 characters, contain at least one digit and one alphabetic character, and must not contain special characters. | |
| Non- negative integer | ^\d+$ | 0 986 | Validates that the field contains an integer greater than zero. |
| Currency (non- negative) | ^\d+(\.\d\d)?$ | 1.00 | Validates a positive currency amount. If there is a decimal point, it requires 2 numeric characters after the decimal point. For example, 3.00 is valid but 3.1 is not. |
| Currency (positive or negative) | ^(-)?\d+(\.\d\d)?$ | 1.20 | Validates for a positive or negative currency amount. If there is a decimal point, it requires 2 numeric characters after the decimal point. |
ASP.NET TextBox.MultiLine maxlength
Add following javascript
function Count(text,long)
{
var maxlength = new Number(long); // Change number to your max length.
if(document.getElementById('<%=textBox.ClientID%>').value.length > maxlength){
text.value = text.value.substring(0,maxlength);
alert(" Only " + long + " chars");
}
Where “textBox” is the asp text box ID.
Also add following events in your textbox.
onKeyUp="javascript:Count(this,200);" onChange="javascript:Count(this,200);"
if(document.getElementById('<%=textBox.ClientID%>').value.length > maxlength){
text.value = text.value.substring(0,maxlength);
alert(" Only " + long + " chars");
}
Where “textBox” is the asp text box ID.
Also add following events in your textbox.
onKeyUp="javascript:Count(this,200);" onChange="javascript:Count(this,200);"
Your textbox code should look like
Solution Number 2 for
ASP.NET TextBox.MultiLine maxlength
Another way to achieve this is regular expression. You can add following regular expression validate on asp text box.
Hope this helps you!!!
