无法从按钮 onclick 事件 ASP.NET 4 调用 Javascript 函数
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Cant call Javascript function from button onclick event ASP.NET 4
提问by Nabeel
when ever i call a JavaScript function from asp:buttononclickevent i got this error message
当我从asp:buttononclick事件中调用 JavaScript 函数时，我收到此错误消息
HTML
HTML
<asp:Button ID="btnFromCalOpen" runat="server" Text=" > " onclick="ShowCal()" CssClass = "SElementHide" />
Javascript
Javascript
function ShowCal() {
var elem = document.getElementById('MainContent_CalendarFrom');
if (elem.visibility = "hidden" )
{
elema.style.visibility = "visible";
elema.style.display = "block";
}
else
{
elema.style.visibility = "hidden";
elema.style.display = "none";
}
}
Error Compiler Error Message: BC30456: 'ShowCal' is not a member of 'ASP.default_aspx'.
错误编译器错误消息：BC30456：“ShowCal”不是“ASP.default_aspx”的成员。
Please Help
请帮忙
回答by p.campbell
Use OnClientClickto have your ASP.NET button run a JavaScript method before calling its server-side method. OnClickspecifies the server side method to run.
使用OnClientClick有你的ASP.NET按钮调用它的服务器端方法之前运行JavaScript方法。OnClick指定要运行的服务器端方法。
<asp:Button ID="btnFromCalOpen" runat="server"
Text=" > " CssClass = "SElementHide"
OnClientClick="ShowCal()" />
回答by Kris Krause
Have you tried the OnClientClickproperty?
你试过OnClientClick物业吗？
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.button.onclientclick.aspx
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.button.onclientclick.aspx
Also, this does not look correct:
此外，这看起来不正确：
if (elem.visibility = "hidden")
Should be closer to:
应该更接近：
if (elem.style.visibility == "hidden")
Are you also looking for the button to prevent post back? Then, return false in your ShowCal javascript function.
您是否也在寻找防止回传的按钮？然后，在 ShowCal javascript 函数中返回 false。
回答by lincolnk
use OnClientClick. onclickis for a server side handler.
使用OnClientClick. onclick用于服务器端处理程序。
also you need to check elem.style.visibility.
你也需要检查elem.style.visibility。
also you're creating elemin your js function and then trying to access elema.
您也在elemjs 函数中创建，然后尝试访问elema.
