代码如下:
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 = "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 CB4949501DA_checkLong = 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}nn";
再添加代码去调用写入的javascript函数：
代码如下:
protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer)
{
base.AddAttributesToRender(writer);
writer.AddAttribute("onkeypress", "return CB4949501DA_checkLong(this.value);");}
另外，引用文件是这样的。
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：
代码如下:
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;
}