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Avoiding & when adding a JavaScript event handler using Attributes.Add()Attributes.Add() method as follows: Dim jscode as String = "return (event.keyCode>=65&&event.keyCode<=90);" TextBox2.Attributes.Add("onKeyPress", jscode) You will notice that jscode contains the JavaScript Logical And operator (&&). However, ASP.NET renders this as && in the code that is output, even though it is intended to be client-side JavaScript, not a visible onscreen character. How can I get ASP.NET to output onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" instead of onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" I am using VB.NET to write my server-side code, and am using Visual Studio ..NET 2003 with .NET 1.1. Thanks in advance for any help you can give. Server.HTMLDecode("&&")
Show quoteHide quote "Nathan Sokalski" <njsokal***@hotmail.com> wrote in message news:%23O%23qAYLPGHA.2088@tk2msftngp13.phx.gbl... >I add a JavaScript event handler to some of my Webcontrols using the >Attributes.Add() method as follows: > > > Dim jscode as String = "return (event.keyCode>=65&&event.keyCode<=90);" > TextBox2.Attributes.Add("onKeyPress", jscode) > > > You will notice that jscode contains the JavaScript Logical And operator > (&&). However, ASP.NET renders this as && in the code that is > output, even though it is intended to be client-side JavaScript, not a > visible onscreen character. How can I get ASP.NET to output > > > onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" > > instead of > > onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" > > > I am using VB.NET to write my server-side code, and am using Visual Studio > .NET 2003 with .NET 1.1. Thanks in advance for any help you can give. > -- > Nathan Sokalski > njsokal***@hotmail.com > http://www.nathansokalski.com/ > That would return the String && which is what I am currently putting in. The
conversion to && occurs somewhere between the call to Attributes.Add() and the time that the page is sent to the browser. The problem is that I don't know where, and if I did, I am not sure it is an area of code that I have the ability to edit, because I think it is in some area of the code that is part of ASP.NET, and I therefore do not have access to the source code. I do still want to find a way to output characters without having them go through what I think is the Server.HtmlEncode() method, but I have found a reasonably simple workaround for doing what I was trying to do that caused me to start this thread (see the message I posted at 2/28/2006 7:32 PM for the workaround I found) Show quoteHide quote "Scott M." <s-mar@nospam.nospam> wrote in message news:e2VK66NPGHA.1312@TK2MSFTNGP09.phx.gbl... > Server.HTMLDecode("&&") > > > "Nathan Sokalski" <njsokal***@hotmail.com> wrote in message > news:%23O%23qAYLPGHA.2088@tk2msftngp13.phx.gbl... >>I add a JavaScript event handler to some of my Webcontrols using the >>Attributes.Add() method as follows: >> >> >> Dim jscode as String = "return (event.keyCode>=65&&event.keyCode<=90);" >> TextBox2.Attributes.Add("onKeyPress", jscode) >> >> >> You will notice that jscode contains the JavaScript Logical And operator >> (&&). However, ASP.NET renders this as && in the code that is >> output, even though it is intended to be client-side JavaScript, not a >> visible onscreen character. How can I get ASP.NET to output >> >> >> onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" >> >> instead of >> >> onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" >> >> >> I am using VB.NET to write my server-side code, and am using Visual >> Studio .NET 2003 with .NET 1.1. Thanks in advance for any help you can >> give. >> -- >> Nathan Sokalski >> njsokal***@hotmail.com >> http://www.nathansokalski.com/ >> > > Yup, I don't think there is any easy solution save the
workaround you used. Frankly, I think they got this one wrong in ASP.NET. It does the html encoding automatically on that method call. The only other workaround I can think of is to use methods of the HtmlTextWriter and simply write the whole element without the encoding turned on. That's not as easy to pull off as your workaround and may need a custom control. The correct way for ASP.NET to have done this would've been to at least turn off html encoding when "javascript:" is prepended to the text, or better yet, another parameter in that method for the encoding, just like one of the overloads of the AddAttribute method of the HtmlTextWriter. Show quoteHide quote "Nathan Sokalski" <njsokal***@hotmail.com> wrote in message news:OMzPOkOPGHA.2036@TK2MSFTNGP14.phx.gbl... > That would return the String && which is what I am currently putting in. The > conversion to && occurs somewhere between the call to > Attributes.Add() and the time that the page is sent to the browser. The > problem is that I don't know where, and if I did, I am not sure it is an > area of code that I have the ability to edit, because I think it is in some > area of the code that is part of ASP.NET, and I therefore do not have access > to the source code. I do still want to find a way to output characters > without having them go through what I think is the Server.HtmlEncode() > method, but I have found a reasonably simple workaround for doing what I was > trying to do that caused me to start this thread (see the message I posted > at 2/28/2006 7:32 PM for the workaround I found) > -- > Nathan Sokalski > njsokal***@hotmail.com > http://www.nathansokalski.com/ > > "Scott M." <s-mar@nospam.nospam> wrote in message > news:e2VK66NPGHA.1312@TK2MSFTNGP09.phx.gbl... > > Server.HTMLDecode("&&") > > > > > > "Nathan Sokalski" <njsokal***@hotmail.com> wrote in message > > news:%23O%23qAYLPGHA.2088@tk2msftngp13.phx.gbl... > >>I add a JavaScript event handler to some of my Webcontrols using the > >>Attributes.Add() method as follows: > >> > >> > >> Dim jscode as String = "return (event.keyCode>=65&&event.keyCode<=90);" > >> TextBox2.Attributes.Add("onKeyPress", jscode) > >> > >> > >> You will notice that jscode contains the JavaScript Logical And operator > >> (&&). However, ASP.NET renders this as && in the code that is > >> output, even though it is intended to be client-side JavaScript, not a > >> visible onscreen character. How can I get ASP.NET to output > >> > >> > >> onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" > >> > >> instead of > >> > >> onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" > >> > >> > >> I am using VB.NET to write my server-side code, and am using Visual > >> Studio .NET 2003 with .NET 1.1. Thanks in advance for any help you can > >> give. > >> -- > >> Nathan Sokalski > >> njsokal***@hotmail.com > >> http://www.nathansokalski.com/ > >> > > > > > >
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"Nathan Sokalski" <njsokal***@hotmail.com> wrote in Nathan,news:#O#qAYLPGHA.2088@tk2msftngp13.phx.gbl: > I add a JavaScript event handler to some of my Webcontrols using > the Attributes.Add() method as follows: > > > Dim jscode as String = "return > (event.keyCode>=65&&event.keyCode<=90);" > TextBox2.Attributes.Add("onKeyPress", jscode) > > > You will notice that jscode contains the JavaScript Logical And > operator (&&). However, ASP.NET renders this as && in > the code that is output, even though it is intended to be > client-side JavaScript, not a visible onscreen character. How > can I get ASP.NET to output > > > onKeyPress="return (event.keyCode>=65&&event.keyCode<=90);" > > instead of > > onKeyPress="return > (event.keyCode>=65&&event.keyCode<=90);" > > > I am using VB.NET to write my server-side code, and am using > Visual Studio .NET 2003 with .NET 1.1. Thanks in advance for any > help you can give. I think your solution of using Page.RegisterClientScriptBlock is about the only reasonable thing that will work. I used Reflector to trace thru System.Web.UI.WebControlsWebControl.Attributes to see if it was doing any kind of encoding. It turns out that System.Web.HttpUtility.HtmlAttributeEncode is called on any text added via Attributes.Add. As you've found out, HtmlAttributeEncode turns & into &. It also turns double quotes (") into ". 
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