How to register Javascript in asp.net Custom Controls

Copy codeThe Code is as follows:
Protected override void OnPreRender (EventArgs e)
{

Base. OnPreRender (e );
RenderJS ();
}

Private void RenderJS ()
{
If (! Page. ClientScript. IsClientScriptBlockRegistered (SCRIPT_ID) // if no statement has been registered, register
{
Page. ClientScript. RegisterClientScriptBlock (this. GetType (), SCRIPT_ID, SCRIPT_CONTENT );
}

}
Private const string SCRIPT_ID = "5B7A061B93D546A7A2601D56A8738DB9"; // custom ID Guid
Private const string SCRIPT_CONTENT = "<script type = \" text/javascript \ "> \ nvar CB4949501DA_checkDouble = function (data) {\ nvar key = event. keyCode; \ nif (key <48 | key> 57) & key! = 46 & key! = 45) {\ nreturn false; \ n} \ nelse {\ nif (key = 46) {\ nif (data. indexOf (\".\")! =-1 | data. length = 0) \ nreturn false; \ n} \ nelse if (key = 45) {\ nif (data. indexOf (\"-\")! =-1 | data. length! = 0) {\ nreturn false; \ n} \ nreturn true; \ n} \ nvar cb49501da_checkint = function (data) {\ nvar key = event. keyCode; \ n \ nif (key <48 | key> 57) & key! = 45) {\ nreturn false; \ n} \ nelse {\ nif (key = 45) {\ nif (data. indexOf (\"-\")! =-1 | data. length! = 0) {\ nreturn false; \ n} \ nelse {\ nvar input = String. fromCharCode (key) \ nvar intData = parseInt (data + input); \ nif (intData> 2147483647 | intData <-2147483648) {\ nreturn false; \ n} \ nreturn true; \ n} \ nvar <span style = "color: # ff0000; "> CB4949501DA_checkLong </span> = function (data) {\ nvar key = event. keyCode; \ n \ nif (key <48 | key> 57) & key! = 45) {\ nreturn false; \ n} \ nelse {\ nif (key = 45) {\ nif (data. indexOf (\"-\")! =-1 | data. length! = 0) {\ nreturn false; \ n} \ nelse {\ nvar input = String. fromCharCode (key) \ nvar longstrData = data + input \ nif (longstrData. length> 19) {\ nreturn false; \ n} \ nreturn true; \ n} \ n </script> \ n ";

Then add the code to call the written javascript function:
Copy codeThe Code is as follows:
Protected override void AddAttributesToRender (System. Web. UI. HtmlTextWriter writer)
{

Base. AddAttributesToRender (writer );
Writer. addattripress ("onkeypress", "return <span style =" color: # ff0000; "> CB4949501DA_checkLong </span> (this. value );");}

In addition, the reference file is like this.
Copy codeThe Code is as follows:
If (! Page. ClientScript. IsClientScriptIncludeRegistered ("reference js File 1") // if no reference is available, reference
{
Page. ClientScript. RegisterClientScriptInclude ("reference js File 1", "JS/MYJS. JS ");
}

View the source code on the generated page. The result is as follows:
Copy codeThe Code is as follows:
<Script src = "JS/MYJS. JS" type = "text/javascript"> </script>
<Script type = "text/javascript">
Var CB4949501DA_checkDouble = function (data ){
Var key = event. keyCode;
If (key <48 | key> 57) & key! = 46 & key! = 45 ){
Return false;
}
Else {
If (key = 46 ){
If (data. indexOf (".")! =-1 | data. length = 0)
Return false;
}
Else if (key = 45 ){
If (data. indexOf ("-")! =-1 | data. length! = 0 ){
Return false;
}
}
}
Return true;
}
Var CB4949501DA_checkInt = function (data ){
Var key = event. keyCode;

If (key <48 | key> 57) & key! = 45 ){
Return false;
}
Else {
If (key = 45 ){
If (data. indexOf ("-")! =-1 | data. length! = 0 ){
Return false;
}
}
Else {
Var input = String. fromCharCode (key)
Var intData = parseInt (data + input );
If (intData> 2147483647 | intData <-2147483648 ){
Return false;
}
}
Return true;
}
Return true;
}
Var CB4949501DA_checkLong = function (data ){
Var key = event. keyCode;

If (key <48 | key> 57) & key! = 45 ){
Return false;
}
Else {
If (key = 45 ){
If (data. indexOf ("-")! =-1 | data. length! = 0 ){
Return false;
}
}
Else {
Var input = String. fromCharCode (key)
Var longstrData = data + input
If (longstrData. length> 19 ){
Return false;
}
}
}
Return true;
}
</Script>