asp.net custom control register JavaScript Problem Solution _ Practical Tips

Copy Code code as follows:

protected override void OnPreRender (EventArgs e)
{

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

private void Renderjs ()
{
if (! Page.ClientScript.IsClientScriptBlockRegistered (script_id))//If you have not yet registered a statement, register
{
Page.ClientScript.RegisterClientScriptBlock (this. GetType (), script_id,script_content);
}

}
Private Const string script_id = "5B7A061B93D546A7A2601D56A8738DB9";//Custom Identity GUID
Private Const string script_content = "<script type=\" text/javascript\ >\nvar cb4949501da_checkdouble = function ( Data) {\nvar key = event.keycode;\nif (Key < | | | key >) && key!= && key!=) {\nreturn F Alse;\n}\nelse {\nif (key = =) {\nif (Data.indexof (\ ". \")!=-1 | | data.length = 0) \nreturn false;\n}\nelse if (key = = {\nif (Data.indexof (\ "-\")!=-1 | | data.length!= 0} {\nreturn False;\n}\n}\n}\nreturn true;\n}\nvar CB4949501DA_chec Kint = function (data) {\nvar key = event.keycode;\n\nif ((Key < | | | key >) && key!=) {\nreturn fal Se;\n}\nelse {\nif (key = =) {\nif (Data.indexof (\-\)!=-1 | | data.length!= 0) {\nreturn false;\n}\n}\nelse {\nvar i Nput = String.fromCharCode (key) \nvar Intdata = parseint (data + input) \nif (Intdata > 2147483647 | | intdata <-21474 83648) {\nreturn false;\n}\n}\nreturn true;\n}\nreturn true;\n}\nvar <span style= "color: #ff0000;" >cb4949501da_checklong </span>= FunctioN (data) {\nvar key = event.keycode;\n\nif (Key < | | | key > () && key!=) {\nreturn False;\n}\nelse { \nif (key = =) {\nif (Data.indexof (\-\)!=-1 | | data.length!= 0) {\nreturn false;\n}\n}\nelse {\nvar input = String. fromCharCode (key) \nvar longstrdata = data + input\nif (Longstrdata.length >) {\nreturn true ; \n}\n</script>\n ";

Add code to invoke the written JavaScript function:

Copy Code code as follows:

protected override void AddAttributesToRender (System.Web.UI.HtmlTextWriter writer)
{

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

In addition, the reference file is like this.

Copy Code code as follows:

if (! Page.ClientScript.IsClientScriptIncludeRegistered ("Reference JS file 1")//if there is no reference, then reference
{
Page.ClientScript.RegisterClientScriptInclude ("Quote JS file 1", "Js/myjs.") JS ");
}

Generated pages view the source code effect as follows:

Copy Code code 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 < | | key >) && key!= && 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 < | | | key >) && 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 < | | | key >) && 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>