Example of ASP. NET Ajax in action-scriptmanager Exception Handling

Last Update:2018-12-06 Source: Internet

Author: User

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Use onasyncpostbackerror = "scriptmanagerpolicasyncpostbackerror" to capture exceptions,

Use scriptmanager1.asyncpostbackerrormessage = E. exception. message; Output exception information, add sys. webforms. pagerequestmanager. getinstance (). add_endrequest (endrequesthandler); method. When the resend ends, an exception message is displayed in the div!

Similar methods include:

Add_beginrequest () add_beginrequest (handler) Variant
Add_endrequest () add_endrequest (handler) Variant
Add_initializerequest () add_initializerequest (handler) Variant
Add_pageloaded () add_pageloaded (handler) Variant
Add_pageloading () add_pageloading (handler) Variant

<% @ Page Language = "C #" %>

<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en"
Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>

Protected void errorprocessclick_handler (Object sender, eventargs E)
{
// This handler demonstrates an error condition. In this example
// The server error gets intercepted on the client and an alert is shown.
Throw new argumentexception ();
}
Protected void successprocessclick_handler (Object sender, eventargs E)
{
// This handler demonstrates no server side exception.
Updatepanelmessage. Text = "the asynchronous PostBack completed successfully .";
}

Protected void scriptmanagerpolicasyncpostbackerror (Object sender, asyncpostbackerroreventargs E)
{
Scriptmanager1.asyncpostbackerrormessage = E. Exception. message;
}

</SCRIPT>

<HTML xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> pagerequestmanager endrequesteventargs example </title>
<Style type = "text/CSS">
Body {
Font-family: tahoma;
}
# Alertdiv {
Left: 40%; top: 40%;
Position: absolute; width: 200px;
Padding: 12px;
Border: #000000 1px solid;
Background-color: white;
Text-align: left;
Visibility: hidden;
Z-index: 99;
}
# Alertbuttons {
Position: absolute;
Right: 5%;
Bottom: 5%;
}
</Style>
</Head>
<Body id = "bodytag">
<Form ID = "form1" runat = "server">
<Div>
<Asp: scriptmanager id = "scriptmanager1" runat = "server"
Onasyncpostbackerror = "scriptmanagerpolicasyncpostbackerror">
</ASP: scriptmanager>

<SCRIPT type = "text/JavaScript" Language = "JavaScript">
VaR divelem = 'alertdiv ';
VaR messageelem = 'alertmesse ';
VaR errormessageadditional = 'Please try again .';
VaR bodytag = 'bodytag ';
SYS. webforms. pagerequestmanager. getinstance (). add_endrequest (endrequesthandler );
Function togglealertdiv (visstring)
{
If (visstring = 'ddn ')
{
$ Get (bodytag). style. backgroundcolor = 'white ';
}
Else
{
$ Get (bodytag). style. backgroundcolor = 'Gray ';

}
VaR adiv = $ get (divelem );
Adiv. style. Visibility = visstring;

}
Function clearerrorstate (){
$ Get (messageelem). innerhtml = '';
Togglealertdiv ('did ');
}
Function endrequesthandler (sender, argS)
{
If (ARGs. get_error ()! = Undefined & args. get_error (). httpstatuscode = '20140901 ')
{
VaR errormessage = args. get_error (). Message
Args. set_errorhandled (true );
Togglealertdiv ('visable ');
$ Get (messageelem). innerhtml = '"' +
Errormessage + '"' + errormessageadditional;
}

}
</SCRIPT>
<Asp: updatepanel runat = "server" updatemode = "Conditional" id = "updatepanel1">
<Contenttemplate>
<Asp: Panel id = "Panel1" runat = "server" groupingtext = "Update panel">
<Asp: Label id = "updatepanelmessage" runat = "server"/>
<Br/>
Last update:
<% = Datetime. Now. tostring () %>
.
<Br/>
<Asp: button runat = "server" id = "button1" text = "Submit successful async PostBack"
Onclick = "successprocessclick_handler" onclientclick = "clearerrorstate ()"/>
<Asp: button runat = "server" id = "button2" text = "Submit async PostBack with error"
Onclick = "errorprocessclick_handler" onclientclick = "clearerrorstate ()"/>
<Br/>
</ASP: Panel>
</Contenttemplate>
</ASP: updatepanel>
<Div id = "alertdiv">
<Div id = "alertmessage">
</Div>
<Br/>
<Div id = "alertbuttons">
<Input id = "okbutton" type = "button" value = "OK"
Runat = "server" onclick = "clearerrorstate ()"/>
</Div>
</Div>
</Form>
</Body>
</Html>

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Example of ASP. NET Ajax in action-scriptmanager Exception Handling

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