asp.net自定义控件中注册Javascript问题解决方案

protected override void onprerender(eventargs e)
{

base.onprerender(e);
renderjs();
}

private void renderjs()
{
if (!page.clientscript.isclientscriptblockregistered(script_id))//如果还没有注册语句，则注册
{
page.clientscript.registerclientscriptblock(this.gettype(),script_id,script_content);
}

}
private const string script_id = "5b7a061b93d546a7a2601d56a8738db9";//自定义标识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}\n}\n}\nreturn true;\n}\nvar cb4949501da_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}\n}\nelse {\nvar input = string.fromcharcode(key)\nvar intdata = parseint(data + input);\nif (intdata > 2147483647 || intdata < -2147483648) {\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 < 48 || key > 57) && key != 45) {\nreturn false;\n}\nelse {\nif (key == 45) {\nif (data.indexof(\"-\") != -1 || data.length != 0) {\nreturn false;\n}\n}\nelse {\nvar input = string.fromcharcode(key)\nvar longstrdata = data + input\nif (longstrdata.length > 19) {\nreturn false;\n}\n}\n}\nreturn true;\n}\n</script>\n";

再添加代码去调用写入的javascript函数：

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);");}

另外，引用文件是这样的。

if (!page.clientscript.isclientscriptincluderegistered("引用js文件1"))//如果还没有引用，则引用
{
page.clientscript.registerclientscriptinclude("引用js文件1", "js/myjs.js");
}

生成的页面查看源代码效果如下：

<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>