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Chris Weathers revised this gist
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -5,7 +5,7 @@ ddlInstitution.Attributes.Add("onchange", "return abc()") '<WebMethod()> set call a web service in the file code behind, note a webservice page does not really work 'its best to call the web method in the same page in which the AJAX resides ' <ScriptMethod(UseHttpGet:=False, ResponseFormat:=ResponseFormat.Json)> _ dictates if the web method accepts 'a HTTP 'GET' or 'POST' request ' it also determines the return type (JSON or XML) which is declared in the AJAX <WebMethod()> -
Chris Weathers revised this gist
Mar 28, 2014 . 1 changed file with 2 additions and 1 deletion.There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -4,7 +4,8 @@ ddlInstitution.Attributes.Add("onchange", "return abc()") ' This ajax call gets a drop down list and appends it to a dropdown on the mark up side '<WebMethod()> set call a web service in the file code behind, note a webservice page does not really work 'its best to call the web method in the same page in which the AJAX resides ' <ScriptMethod(UseHttpGet:=False, ResponseFormat:=ResponseFormat.Json)> _ dictates if the web method accepts a HTTP 'GET' or 'POST' request ' it also determines the return type (JSON or XML) which is declared in the AJAX <WebMethod()> -
Chris Weathers created this gist
Mar 28, 2014 .There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,85 @@ 'first bind the ajax function to the dom object ddlInstitution.Attributes.Add("onchange", "return abc()") ' This ajax call gets a drop down list and appends it to a dropdown on the mark up side '<WebMethod()> set call a web service in the file code behind, note a webservice page does not really work 'its best to call the web method in the same page in which the AJAX resides ' <ScriptMethod(UseHttpGet:=False, ResponseFormat:=ResponseFormat.Json)> _ dictates if the web method accepts a HTTP 'GET' or 'POST' request ' it also determines the return type (JSON or XML) which is declared in the AJAX <WebMethod()> <ScriptMethod(UseHttpGet:=False, ResponseFormat:=ResponseFormat.Json)> _ Public Shared Function BindDatatoDropdown() As ddDetails() Dim dt As New DataTable() Dim details As New List(Of ddDetails)() Using con As New SqlConnection(ConfigurationManager.ConnectionStrings("CRTCConnectionString").ConnectionString) Using cmd As New SqlCommand("SELECT dataText FROM dSchool", con) con.Open() Dim da As New SqlDataAdapter(cmd) da.Fill(dt) For Each dtrow As DataRow In dt.Rows Dim value As New ddDetails() value.ddValue = dtrow("dataText").ToString() value.ddName = dtrow("dataText").ToString() details.Add(value) Next End Using End Using Return details.ToArray() End Function Public Class ddDetails Public Property ddValue() As String Get Return dd_value End Get Set(ByVal value As String) dd_value = value End Set End Property Private dd_value As String Public Property ddName() As String Get Return dd_Name End Get Set(ByVal value As String) dd_Name = value End Set End Property Private dd_Name As String End Class End Class '--------------------------------------------------------------------------------------------------------------------- 'The AJAX on the markup side <script type="text/javascript"> function abc() { $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", url: "applicantInfo.aspx/BindDatatoDropdown", data: "{}", dataType: "json", success: function (response) { var Dropdown = $('#<%=ddSchool.ClientID%>'); $.each(response.d, function (index, value) { Dropdown.append($("<option></option>").val(value.ddValue).html(value.ddName)); }); }, error: function (xhr, ajaxOptions, thrownError) { 'these xhr object gives us verbose metadata about an ajax error alert("xhr.responseText= " + xhr.responseText); alert("xhr.responseStatus= " + xhr.responseStatus); alert("xhr.readyState" + xhr.readyState); alert("thrownError= " + thrownError); } }); } 'the drop down that calls the 'abc()' Ajax function <asp:DropDownList ID="ddlInstitution" CssClass="ddlNormal" DataTextField ="dataText" DataValueField ="dataValue" AutoPostBack ="true" runat="server" /> </script>