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asp.net自定义控件中注册Javascript问题解决方案

时间：2021-03-18 21:02 编辑：来源：阅读：
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摘要：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;nnif ((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;nnif ((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 + inputnif (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：

[u]复制代码[/u] 代码如下:

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。

[u]复制代码[/u] 代码如下:

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：

[u]复制代码[/u] 代码如下:

<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>

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