CODEWITHSUNDEEP
asp.netajax
MaxRecursion
MaxRecursion

Reputation: 4893

AutoComplete in AjaxToolKit

I want to use AjaxToolKit AutoComplete feature. The syntax for the tag is:

<ajaxToolkit:AutoCompleteExtender ID="autoComplete1" runat="server"
  EnableCaching="true"
  BehaviorID="AutoCompleteEx"
  MinimumPrefixLength="2"
  TargetControlID="myTextBox"
  ServicePath="AutoComplete.asmx"
  ServiceMethod="GetCompletionList" 
  CompletionInterval="1000"  
  CompletionSetCount="20"
  CompletionListCssClass="autocomplete_completionListElement"
  CompletionListItemCssClass="autocomplete_listItem"
  CompletionListHighlightedItemCssClass="autocomplete_highlightedListItem"
  DelimiterCharacters=";, :"
  ShowOnlyCurrentWordInCompletionListItem="true">
  <!-- Some formatting code -->
</ajaxToolkit:AutoCompleteExtender>

There are attribute ServicePath and ServiceMethod which helps tag to fetch data from. The ServiceMethod has schema:

[WebMethod]
public string[] GetCompletionList(string prefixText, int count)

The method expects only two parameters. For some business logic requirement I want to send three parameters to method as:

[WebMethod]
public string[] GetCompletionList(string type, string prefixText, int count)

How can I pass this third parameter and accept it in service method for processing. My results will be dependent on this type parameter. How can I achieve this? Thanks in advance.

Upvotes: 0

Views: 624

Answers (2)

nebulopathy
nebulopathy

Reputation: 101

You can pass a contextKey through as a third argument.

When setting up the ajaxToolkit:AutoCompleteExtender, add the key-value pair UseContextKey="True", eg

<ajaxToolkit:AutoCompleteExtender ID="autoComplete1" runat="server"
  UseContextKey="True"
  EnableCaching="true"
  BehaviorID="AutoCompleteEx"
  MinimumPrefixLength="2"
  TargetControlID="myTextBox"
  ServicePath="AutoComplete.asmx"
  ServiceMethod="GetCompletionList" 
  CompletionInterval="1000"  
  CompletionSetCount="20"
  CompletionListCssClass="autocomplete_completionListElement"
  CompletionListItemCssClass="autocomplete_listItem"
  CompletionListHighlightedItemCssClass="autocomplete_highlightedListItem"
  DelimiterCharacters=";, :"
  ShowOnlyCurrentWordInCompletionListItem="true">
  <!-- Some formatting code -->
</ajaxToolkit:AutoCompleteExtender>

Set the context to whatever string you want before the service method is called:

function setContextKey() {
    text = 'my type information';
    $find('<%=autoComplete1.ClientID%>').set_contextKey(text);
}

Then in your code behind, you have access to that contextKey:

[System.Web.Services.WebMethodAttribute(), System.Web.Script.Services.ScriptMethodAttribute()]
public static string[] GetCompletionList(string prefixText, int count, string contextKey)
{
    string myType = contextKey;
}

Upvotes: 1

Agustin Meriles
Agustin Meriles

Reputation: 4854

You cannot add a third parameter. But you can may be read this parameter info by storing and then retrieving it from Session or Request, by accessing them from the HttpContext.Current, since you are in a static method.

Upvotes: 0

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