The operation has timed out.

This error come when we try to access a web service method and this method takes more than 2 minutes to response. Because IIS default timeout is 120 seconds.
To resolve this problem set the web service timeout at runtime
as below....

SheetCuttingWebService.Service objWeb;
objWeb = new UserInterfaceLayer.SheetCuttingWebService.Service();
objWeb.Timeout = 3600000(mili seconds);
dsPlate = objWeb.GetPlates(origin_id, specification, length, width, thickness, do_number, heat_no, plate_no, drawing_no, certificate_no, percentage_free, balance_wt, order_by_column, user_id, plate_id, reqLengthFrom, reqLengthTo, reqWidthFrom, reqWidthTo, IsDiscarded);

Javascript keyCode

Key Pressed Javascript Key Code backspace 8 tab 9 enter 13 shift 16 ctrl 17 alt 18 pause/break 19 caps lock 20 escape 27 page up 33 page down 34 end 35 home 36 left arrow 37 up arrow 38 right arrow 39 down arrow 40 insert 45 delete 46 0 48 1 49 2 50 3 51 4 52 5 53 6 54 7 55 8 56 9 57

Key Pressed Javascript Key Code a 65 b 66 c 67 d 68 e 69 f 70 g 71 h 72 i 73 j 74 k 75 l 76 m 77 n 78 o 79 p 80 q 81 r 82 s 83 t 84 u 85 v 86 w 87 x 88 y 89 z 90

Key Pressed Javascript Key Code left window key 91 right window key 92 select key 93 numpad 0 96 numpad 1 97 numpad 2 98 numpad 3 99 numpad 4 100 numpad 5 101 numpad 6 102 numpad 7 103 numpad 8 104 numpad 9 105 multiply 106 add 107 subtract 109 decimal point 110 divide 111 f1 112 f2 113 f3 114 f4 115 f5 116 f6 117 f7 118 f8 119 f9 120 f10 121 f11 122 f12 123

Key Pressed Javascript Key Code num lock 144 scroll lock 145 semi-colon 186 equal sign 187 comma 188 dash 189 period 190 forward slash 191 grave accent 192 open bracket 219 back slash 220 close braket 221 single quote 222

w3schools

http://wwwhttp://www.blogger.com/img/blank.gif.w3schools.com/default.asp

Sys.InvalidOperationException: Handler must be a function.

This exception comes when you give java script function name with parenthesis to an ajax control. e.g <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
...
....
<form id="form1" runat="server">
    <asp:ScriptManager ID="sm1" runat="server"></asp:ScriptManager>
    <cc1:TabContainer runat="server" ID="tbcTabContainer" OnClientActiveTabChanged="ChangeTab()"></cc1:TabContainer>
</form> Above OnClientActiveTabChanged="ChangeTab()" is not valid. Solution: Change OnClientActiveTabChanged="ChangeTab()" to OnClientActiveTabChanged="ChangeTab"

AutoCompleteExtender with Animation

<ajaxToolkit:AutoCompleteExtender runat="server" BehaviorID="AutoCompleteEx"
ID="autoComplete1" TargetControlID="txtPayorName" ServicePath="~/Public/AutoCompleteService.asmx"
MinimumPrefixLength="1" CompletionInterval="1000" EnableCaching="true" CompletionSetCount="20"
ServiceMethod="GetPayorsList" CompletionListCssClass="autocompleteCompletionListElement"
CompletionListItemCssClass="autocompleteListItem" CompletionListHighlightedItemCssClass="autocompleteHighlightedListItem"
DelimiterCharacters="">

    <Animations>

        <OnShow>
              <Sequence>  
                     <OpacityAction Opacity='0' />
                       <HideAction Visible='true'/>                                              
                        <Parallel Duration='.1'>
                                <FadeIn />
                                 <Length PropertyKey='height' StartValue='0' EndValueScript='225' />
                       </Parallel>
               </Sequence>
             </OnShow>
             <OnHide>
                    <Parallel Duration='.1'>
                           <FadeOut/>
                            <Length PropertyKey='height' StartValueScript='225' EndValue='0'/>
                     </Parallel>
               </OnHide>
    </Animations>
</ajaxToolkit:AutoCompleteExtender>

Excel System.Data.OleDb.OleDbException: No value given for one or more required parameter

This Error comes when Excel connection string "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\MyExcel.xls;Extended Properties="Excel 8.0;HDR=Yes;IMEX=1" " contains 'HDR=Yes' and you are using F1,F2, F3, etc in your select statement.

Solution:
if your Excel connection string contains 'HDR=Yes' then valid columns would be in the first row of the specified Worksheet (or Range). Otherwise, (HDR=No) the column names default to F1, F2, F3, etc.