Restrict other font type like "Symbol" in textbox

Create a css class having the property ime-mode:disabled; then add that class to the text box.

This will prevent you from alowing other fonts other than english.

Then for copy paste use onpaste = "return false"

<asp:TextBox ID="TxtSample" Runat="server" CssClass="ime" onpaste="return false;"/>

.ime

{

ime-mode:disabled;

}

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user following validation function
function CheckAlpha_name(strString) {
var strValidChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ .";
var strChar;
var blnResult = true;
if (strString.length == 0) return false;

// test strString consists of valid characters listed above
for (i = 0; i < strString.length && blnResult == true; i++) {
strChar = strString.charAt(i);
if (strValidChars.indexOf(strChar) == -1) {
blnResult = false;
}
}
return blnResult;
}


function validation(){
if (CheckAlpha_name(document.getElementById('<%=txtFirstName.ClientID%>').value) == false) {
alert("First Name can contain only alphabets.");
document.getElementById('<%=txtFirstName.ClientID%>').focus();
return false;
}
return true;
}
call this function on button click like :
<asp:Button ID="btnSubmit" runat="server" Text="" CssClass="myButton" OnClientClick="javascript:return validation();"
OnClick="btnSubmit_Click" />

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