Pass parameter to Web service method

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hello,
I have created Autocomplete text box which shows EmployeeIds of perticular department.

However I am giving option user to select Department from DropDown. i want to pass this selected value to web service that has code for autocomplete.
Following is code in my aspx page:

<asp:TextBox ID="tbEmployeeID" runat="server" CssClass="textBox"></asp:TextBox>
<act:AutoCompleteExtender ID="tbEmployeeID_AutoCompleteExtender"  runat="server" ServicePath="~/EmployeeIDs.asmx" ServiceMethod="GetCompletionList" TargetControlID="tbEmployeeID" MinimumPrefixLength="1"  CompletionInterval="100" CompletionSetCount="10" ShowOnlyCurrentWordInCompletionListItem="true">
</act:AutoCompleteExtender>

How can I pass parameter to webservice?

I even tried using Sessions from codebehind file.. but I got error I webservice saying "Object reference not set to an instance of an object.".

How can I do this..
Please help me

Thank you

Posted 12-Jan-12 18:06pm

tejashri.gandhi

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2 solutions

Solution 2

check these blogs
http://social.msdn.microsoft.com/Forums/en-US/webgadgetdevelopment/thread/176a7f0c-8b9f-4bb2-bda8-e5fb6ae82b6e/[^]
http://midnightprogrammer.net/post/Calling-ASPNET-Web-Service-Using-Jquery-Part-II.aspx[^]
--NDK

Posted 12-Jan-12 18:46pm

NandaKumer

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tejashri.gandhi 13-Jan-12 7:38am

Thank you for sharing these links..

M.Sravan Kumar 26-May-12 6:23am

hi,
how to pass parameters in webservices like categoryname and productname?

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Prerak Patel · Accepted Answer · 2012-01-12T18:35:00

Solution 1

You may use the ContextKey as UseContextKey="True" ContextKey="<your department>"

VB

Public Function GetCompletionList(ByVal prefixText As String, ByVal count As Integer, ByVal contextKey As String) As String()
'Use contextKey in your query

Posted 12-Jan-12 18:35pm

Prerak Patel

Updated 12-Jan-12 18:36pm

v3

Comments

tejashri.gandhi 13-Jan-12 0:55am

I did this.., however it is passing null value even though dropdown value is selected.

<pre>
<asp:TextBox ID="tbEmployeeID" runat="server" CssClass="textBox">
<act:AutoCompleteExtender ID="tbEmployeeID_AutoCompleteExtender" runat="server" ServicePath="~/EmployeeIDs.asmx" ServiceMethod="GetCompletionList" TargetControlID="tbEmployeeID" MinimumPrefixLength="1" UseContextKey="true" ContextKey="<%# Eval(ddlCostCentre.SelectedValue) %>" CompletionInterval="100" CompletionSetCount="10" ShowOnlyCurrentWordInCompletionListItem="true"></pre>

Prerak Patel 13-Jan-12 3:28am

You can set context key on change of dropdown, on server/by javascript.
Link 1, Link 2

tejashri.gandhi 13-Jan-12 3:55am

Thanks..its working fine now..

Prerak Patel 13-Jan-12 4:07am

You are welcome.