Introduction
To create autocomplete textbox you in asp.net
firstly you will have to add Ajex control with your visual studio toolbox. After
add Ajax control follow this steps.
Step 1
Add ScriptManager and update panel Ajax
control to your Default.aspx page.
<body>
<form
id="form1"
runat="server">
<div>
<asp:ScriptManager
ID="ScriptManager1"
runat="server">
</asp:ScriptManager>
<asp:UpdatePanel
ID="UpdatePanel1"
runat="server">
<ContentTemplate>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
Step 2
Now in this step add a textbox and
AutoCompleteExtender in ContentTemplate of update panel. After add both control
set textbox id in AutoCompleteExtender TargetControlID as the following.
<body>
<form
id="form1"
runat="server">
<div>
<asp:ScriptManager
ID="ScriptManager1"
runat="server">
</asp:ScriptManager>
<asp:UpdatePanel
ID="UpdatePanel1"
runat="server">
<ContentTemplate>
<asp:TextBox
runat="server"
ID="TextBox1"
style="top:
201px;
left:
524px;
position:
absolute;
height:
22px;
width:
215px"></asp:TextBox>
<asp:AutoCompleteExtender
ID="TextBox1_AutoCompleteExtender"
runat="server"
DelimiterCharacters=""
Enabled="True"
ServiceMethod="GetCompletionList"
ServicePath=""
TargetControlID="TextBox1"
UseContextKey="True"
MinimumPrefixLength="1"
CompletionListHighlightedItemCssClass="autocomplete_highlightedListItem"
CompletionListItemCssClass="autocomplete_listItem"
CompletionListCssClass="autocomplete_completionListElement">
</asp:AutoCompleteExtender>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
Step 3
Now go on Default.aspx.cs page and write
following code.
public
partial
class
AutoComplite
: System.Web.UI.Page
{
protected
void
Page_Load(object
sender,
EventArgs
e)
{
}
[System.Web.Services.WebMethodAttribute(),
System.Web.Script.Services.ScriptMethodAttribute()]
public
static
string[]
GetCompletionList(string
prefixText,
int
count,
string
contextKey)
{
string
s = prefixText +
"%";
List<string>
str =
new
List<string>();
SqlDataReader
dr;
SqlConnection
con =
new
SqlConnection("Data
Source=.;Initial Catalog=prabhakar;Integrated Security=True");
SqlCommand
cmd =
new
SqlCommand("select
id from Table where id like '"
+ s +
"'",con);
con.Open();
dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while(dr.Read())
{
str.Add(dr["id"].ToString());
}
return
str.ToArray();
}
}
Step 4
Finally run your project you will see result.
Step 5
If you want to do this in disconnected mode
then use following code.
public
partial
class
AutoComplite
: System.Web.UI.Page
{
protected
void
Page_Load(object
sender,
EventArgs
e)
{
}
[System.Web.Services.WebMethodAttribute(),
System.Web.Script.Services.ScriptMethodAttribute()]
public
static
string[]
GetCompletionList(string
prefixText,
int
count,
string
contextKey)
{
string
s = prefixText +
"%";
List<string>
str =
new
List<string>();
SqlDataReader
dr;
SqlConnection
con =
new
SqlConnection("Data
Source=.;Initial Catalog=prabhakar;Integrated Security=True");
SqlCommand
cmd =
new
SqlCommand("select
id from prabh where id like '"
+ s +
"'",con);
SqlDataAdapter
da =
new
SqlDataAdapter(cmd);
DataSet
ds =
new
DataSet();
da.Fill(ds);
foreach
(DataRow
dr
in
ds.Tables[0].Rows)
{
str.Add(dr["id"].ToString());
}
}
}
