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Javascript error in getting code behind values

Answer 1

A:

Wouldn't it be easier to generate this javascript code in your code behind and then call Page.RegisterStartupScript() ? That ensures you have a correct array and you can use less aspx tags in your javascript code.

public string ArrayToJsArray(string[] array)
{
    StringBuilder s = new StringBuilder();
    foreach (var item in array)
    {
        s.Append("'" + Server.HTMLEncode(item) + "',");
    }
    s.Remove(s.Length-1, 1);
}

public void main(){
    string script = "<script type=\"text/javascript\">";
    script += "var TList = new Array(" + ArrayToJsArray(TListArray) + ");";
    script += "var BList = new Array(" + ArrayToJsArray(BListArray) + ");";
    script += "</script>";
    Page.RegisterClientScriptBlock("key", script);
}

Try the above code, forgive me as I haven't run it myself so it may contain bugs but the idea is clear I think.

Peter 2009-07-07 12:26:42

i have tried Page.RegisterArrayDeclaration() and nothing modified and still the array not seen from javascript i have thought about this solution but i don't know what is the problem as the silver tag code is not seen from javascript code and sometimes it's working well and got the data and in other times a javascript error occurred and don't see array values

Ahmy 2009-07-07 12:29:41

do u mean that i put all the script code in string in the code behind and register it ?i don't understnad how to do that? or u mean to register the array ?at all i have javascript code more than that i wrote in the post and to register it so i will got each function and public variables and put it in the code behind to be passed to the function that register the javscript code? please clarify what do u mean and thanks

Ahmy 2009-07-07 12:36:52

I have provided some code that explains what I mean. You create the javascript code to initialize the arrays and then you post them to the page by using registerclientscriptblock.

Peter 2009-07-07 12:47:49

Answer 2

A:

Doesn't .NET have problems rendering aspx tags inside a <script> block?

Are the correct values rendered in the HTML? If not, you should try rendering the whole JS script block in another way.

edeverett 2009-07-07 12:28:57

what do u mean with rendering aspx tags inside a <script> block? and correct values rendered in the HTML? the javascript code got the code behind array values and working well in some cases and in other cases don't feel with the code behind array values and not eneter the javascript function and error occurred in the javascript code.

Ahmy 2009-07-07 12:32:17

Answer 3

+1 A:

You need to correctly escape the values:

TList = new Array("<%=Server.HTMLEncode(ListofT[0]%>)", ...);

Darin Dimitrov 2009-07-07 12:41:08

Thanks u very very much i am too glad for this answer that helped me too much i am too thankful to u and i need from u an illustration from u why ur code solved the problem ? and why Server.HTMLEncode do ? i hope that u will reply because this will help me in future in understanding manythings and thanks too much

Ahmy 2009-07-07 13:02:49

Suppose for example that ListofT[0] = "abc\"abc"; This means that you will end up with the following markup: TList = new Array("abc"abc", ...) which is an invalid javascript and you get an error. Server.HTMLEncode converts " to " and thus you end up with TList = new Array("abc"abc", ...) which now is a valid javascript.

Darin Dimitrov 2009-07-07 14:03:12

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