get autopopulate textbox by typing 3letters

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C#

I wanna autopopulate textbox by typing 3letters...how to do this?
please help me out...

Posted 11-Apr-14 0:06am

Member 10276220

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navi_s_Patil · Answer 1 · 2014-04-11T00:19:00

Solution 2

Add ajax autocomplete to text box

C#

<asp:autocompleteextender id="AutoCompleteExtender1" xmlns:asp="#unknown">
                          runat="server"
                          TargetControlID="txtCity"
                          MinimumPrefixLength="3"
                          EnableCaching="true"
                          CompletionSetCount="1"
                          CompletionInterval="1000"
                          ServiceMethod="GetCity"
</asp:autocompleteextender>

write this code in code behind page

C#

[System.Web.Script.Services.ScriptMethod()]
  [System.Web.Services.WebMethod]
  public static List<string> GetListofCountries(string prefixText)
  {
      using (SqlConnection sqlconn = new SqlConnection("Data Source=.;Initial Catalog=hotel;Integrated Security=True"))
      {
          sqlconn.Open();
          SqlCommand cmd = new SqlCommand("select Country from country where Country like '" + prefixText + "%' ", sqlconn);
          cmd.Parameters.AddWithValue("@Country", prefixText);
          SqlDataAdapter da = new SqlDataAdapter(cmd);
          DataTable dt = new DataTable();
          da.Fill(dt);
          List<string> CountryNames = new List<string>();
          for (int i = 0; i < dt.Rows.Count; i++)
          {
              CountryNames.Add(dt.Rows[i]["country"].ToString());
          }
          return CountryNames;
      }
  }

write a code to get data to auto complete.

Posted 11-Apr-14 0:19am

navi_s_Patil

Updated 11-Apr-14 0:21am

v2

Comments

Member 10276220 11-Apr-14 6:22am

thanx navi_s_Patil...but i did not use autocompleteextender...i did it by using json & javascript...how to do this in json & javascript???
please help me

navi_s_Patil 11-Apr-14 6:28am

you need to give minLength= 3 for ex
$('#mycomplete')
.autocomplete({
source: url,
minLength: 3,
select: function (event, ui) {
$(this).val(ui.item.label);
$('#myhidden').val(ui.item.value);
return false;
}
})

Member 10276220 11-Apr-14 6:29am

i did it...but its not working...
this is my code:
<script type="text/javascript">
$(function () {
debugger;
minLength: 3

$("#<%=txtsearch.ClientID%>").autocomplete({
source: function (request, response) {
debugger;
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "Search.aspx/GetAutoCompleteSearch",
data: "{'MedicineName':'" + document.getElementById('<%=txtsearch.ClientID%>').value + "'}",
dataType: "json",
success: function (data) {
response(data.d);
},
error: function (result) {
alert("Error");
}
});
}

});

})
</script>

navi_s_Patil 11-Apr-14 6:33am

hi you need add inside the autocomplete function

Member 10276220 11-Apr-14 6:39am

hi..I changed it...but still its not working
this is my code:
<script type="text/javascript">
$(function () {
debugger;

$("#<%=txtsearch.ClientID%>").autocomplete({
source: function (request, response) {
debugger;
$.ajax({
minLength: 3,
type: "POST",
contentType: "application/json; charset=utf-8",
url: "Search.aspx/GetAutoCompleteSearch",
data: "{'MedicineName':'" + document.getElementById('<%=txtsearch.ClientID%>').value + "'}",
dataType: "json",
success: function (data) {
response(data.d);
},
error: function (result) {
alert("Error");
}
});
}

});

})
</script>

navi_s_Patil · Answer 2 · 2014-04-11T01:54:00

$(function() {
    $("#<%=txtsearch.ClientID%>").autocomplete({
        source: function(request, response) {
            $.ajax({
                url: "Search.aspx/GetAutoCompleteSearch",
                data: "{'MedicineName':'" + document.getElementById('<%=txtsearch.ClientID%>').value + "'}",
                dataType: "json",
                type: "POST",
                contentType: "application/json; charset=utf-8",
                success: function (data) { response(data.d); }, error: function (result) { alert("Error"); }
                    }))
                },
                error: function(XMLHttpRequest, textStatus, errorThrown) {
                    alert(textStatus);
                }
            });
        },
        minLength: 2
    });
});

</script>

TRY THIS YOU HAVE PLACE MIN LENGTH IN SIDE AUTOCOMPLETE FUNCTION NOT IN AJAX.
I THINK THIS WILL WORK.:)