Develop Reference

How to fix Ajax call "The parameters dictionary contains a null entry........."

I'm trying to send my data via ajax call to the controller but I check all my code I debug it all values are filled but it continuously shows me this error. event its also show me ON MVC call As Well
The parameters dictionary contains a null entry for parameter 'BrandId' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Forms(System.Collections.Generic.IEnumerable1[System.Web.HttpPostedFileBase], System.String, Int32, Int32, Boolean, Int32)'in'AdminDevVersion.Controllers.HomeController'`. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
Parameter name: parameters
i have already debugged the code and I have checked if all the values are filled.
My Ajax Code
function uploadSubmitHandler() {
var PName = $("#ProductName").val();
var Category = $("#CategoryDropDown").val();
var Brand = $("#BrandDropDown").val();
var SubCategory = $("#SubCategory").val();
var ProductDescription = $('textarea.textarea-editor').val();
var NewOROldRadio = $("input[name='ProductStatus']:checked").val();
if (state.fileBatch.length !== 0) {
var data = new FormData();
for (var i = 0; i < state.fileBatch.length; i++) {
data.append('files', state.fileBatch[i].file, state.fileBatch[i].fileName);
}
data.append('ProductName', PName);
data.append('CategoryId', Category);
data.append('BrandId', Brand);
data.append('IsNewStatus', NewOROldRadio);
data.append('SubCategoryId', SubCategory);
data.append('Description', ProductDescription);
$.ajax({
type: 'POST',
url: options.ajaxUrl,
data: data,
cache: false,
contentType: false,
processData: false
});
}
}
Controller Code
[HttpPost]
public ActionResult Forms(IEnumerable<HttpPostedFileBase> files, String ProductName, int CategoryId, int BrandId, bool IsNewStatus, int SubCategoryId)
{
List<string> FileNames = new List<string>();
string ImageName = null;
TblProduct InsertProduct = new TblProduct();
if (ModelState.IsValid == true)
{
InsertProduct.Name = ProductName;
InsertProduct.IsActive = IsNewStatus;
InsertProduct.BrdId = BrandId;
InsertProduct.CatId = SubCategoryId;
InsertProduct.Image = ImageName;
InsertProduct.Created = DateTime.Now;
InsertProduct.IsActive = true;
_RepoProduct.Insert(InsertProduct);
_RepoProduct.Save();
TblProRelImg RelatedImages = new TblProRelImg();
foreach (HttpPostedFileBase file in files)
{
string _path = System.IO.Path.Combine(Server.MapPath("~/Content/Images/"), file.FileName);
file.SaveAs(_path);
if (file == files.First())
{
ImageName = file.FileName.ToString();
}
else
{
RelatedImages.PrdID = InsertProduct.ID;
RelatedImages.Image = file.FileName;
_ReporRelatedImages.Insert(RelatedImages);
_ReporRelatedImages.Save();
}
FileNames.Add(file.FileName);
}
ViewBag.CategoryId = Logics.Category();
ViewBag.BrandInfo = new SelectList(DbContext.TblBrands, "Id", "Name");
}
return View();
}
I have expected to send data to the controller

parse your BrandId to int like blow and append to your data
parseInt(Brand)

ASP.NET ajax call using Jquery adds to list

I have a simple UI where I am trying to populate the select dropdown using data from database. I am doing this by a AJAX call to fetch the data.
The C# web method looks like
private static List<List<string>> componentTypeDropDown = new List<List<String>>();
private void loadDropDownList()
{
OleDbConnection conn = new OleDbConnection(connectionString);
OleDbCommand cmd = new OleDbCommand("SELECT FieldName,FieldLabel FROM dropDownFields", conn);
conn.Open();
OleDbDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
List<String> temp = new List<string>();
temp.Add((string)dr.GetValue(0));
temp.Add((string)dr.GetValue(1));
componentTypeDropDown.Add(temp);
conn.Close();
}
}
[WebMethod]
public static ArrayList getComponentType()
{
ArrayList compType = new ArrayList();
for (int i=0;i<componentTypeDropDown.Count();i++)
{
compType.Add(new { label = componentTypeDropDown[i][0], value = componentTypeDropDown[i][1] });
}
return compType;
}
The AJAX call looks like
$.ajax({
type: "POST",
url: "salesQuote.aspx/getComponentType",
data: "",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (msg) {
console.log("karan");
},
error: function () {
alert("Failed to load names");
}
});
Every time I refresh or even restart the server the value of msg in success callback has previous values as well. For example lets say my database has value 1,2. First time I call ajax msg is 1,2 if i refresh the value is 1,2,1,2 and so on. Even if I close the server and start again the value would be 1,2,1,2,1,2

Your ComponentTypeDropdown is a static, so every time you call 'LoadDropdownList' this list will add new items, whitout removing the old ones.
I would suggest that you add following line in the loadDropDownList method:
private void loadDropDownList()
{
componentTypeDropdown.RemoveAll();
OleDbConnection conn = new OleDbConnection(connectionString);
OleDbCommand cmd = new OleDbCommand("SELECT FieldName,FieldLabel FROM dropDownFields", conn);
conn.Open();
OleDbDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
List<String> temp = new List<string>();
temp.Add((string)dr.GetValue(0));
temp.Add((string)dr.GetValue(1));
componentTypeDropDown.Add(temp);
conn.Close();
}
}

Populate gridview from database using javascript

is there a javascript where I can populate a gridview from the database? For example is there a javascript for this code?
gvRFPCorpCode is the name of my gridview
private void fillCorpCode()
{
DataSet ds = new DataSet();
data.gRowId = this.txtROWID.Text;
ds = data.GetCorpCode();
if (ds != null)
{
if (ds.Tables[0].Rows.Count > 0)
{
this.gvRFPCorpCode.DataSource = ds.Tables[0];
this.gvRFPCorpCode.DataBind();
}
}
}
ds = data.GetCorpCode(); is equal to this:
public DataSet GetCorpCode()
{
DataSet ds = new DataSet();
SqlParameter[] sqlParam = new SqlParameter[]
{
new SqlParameter("#RowId",sRowId)
};
if (this.InitDataLayerObject() == true)
{
ds = this.ExecuteQuery("dbo.sp_ESS_RFP_GetCorpCode", sqlParam);
}
return ds;
}
It's a stored procedure, here is my stored procedure "dbo.sp_ESS_RFP_GetCorpCode"
ALTER PROCEDURE [dbo].[sp_ESS_RFP_GetCorpCode]
-- Add the parameters for the stored procedure here
#RowId varchar(max)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
declare #xml as xml
select
#xml =convert(xml,CORPCODE)
from Tbl_ESS_Request_For_Payment_Save
where ROWID=#RowId
select
tbl.col.value('CorpCode[1]', 'varchar(100)') as CorpCode,
tbl.col.value('Amount[1]', 'varchar(100)')as Amount
from #xml.nodes('/NewDataSet/Table1') tbl(col)
END
What I want is to have a javascript equivalent to private void fillCorpCode to populate it on my gridview, BTW, You might ask why I need a javascript if i already have a code in c#, It's because of some process in my program and it is difficult to explain. So please help me on this one, thank you in advance!

do like this
function getJSONData(selVal, callbackName) {
selVal = encodeURI(selVal);
var formdata = { };// any data you want to pass as input
$.ajax({
type: "POST",
url: "aspx",
data: formdata,
cache: false,
success: function (data) {
callbackName(data);
},
error: function (xhr, ajaxOptions, thrownError) {
alert('Error in processing data !!' + thrownError);
},
async: false
});
}
function createTable() {
mytable = $('<table Class="table table-striped table-bordered table-hover"></table>').attr({ id: "basicTable" });
// alert(rowData);
var rowobj = JSON.parse(rowData);
// To populate header
var firstrow;
var firstrow = $('<tr></tr>').appendTo(mytable);
$('<td></td>').text('Entity Name').appendTo(firstrow);
$('<td></td>').text('Attribute Name').appendTo(firstrow);
$('<td></td>').text(' Value').appendTo(firstrow);
// To populate rows
$.each(rowobj, function (i, obj) {
$('<td valign="middle"></td>').text(obj.ParentName).appendTo(row);
$('<td valign="middle"></td>').text(obj.ParentName1).appendTo(row);
$('<td valign="middle"></td>').text(obj.ParentName2).appendTo(row);});
}
//C# method
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json, UseHttpGet = true)]
public static string Mymethod(string entityName, string entityType, string filterValues)
{
List<MasterFields> fields = null;
ServiceWrapper<ILOSService>.Perform(svcClient =>
{
fields = getfields();
});
JavaScriptSerializer jss = new JavaScriptSerializer();
string output = jss.Serialize(fields);
return output;
}

how to know in wcf service in key/value pair

//IService.cs
[WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json)]
String CheckAuth(String AccountID, String Password);
//Service.cs
public String CheckAuth(String AccountID, String Password)
{
String message="";
string StrCon = #"my conn string";
DataTable dt = new DataTable();
SqlConnection con = new SqlConnection(StrCon);
string qry = "select * from Account where AccountID='" + AccountID + "' and Password='"+Password+"'";
con.Open();
SqlCommand cmd = new SqlCommand(qry, con);
SqlDataAdapter adp = new SqlDataAdapter(cmd);
adp.Fill(dt);
if (dt.Rows.Count > 0)
{
message = "Authorized";
}
else
{
message = "unauthorized";
}
con.Close();
return message;
}
i want to know that what does the variable d: stands for and how can i change the d: to Message:..??
i need some suggestion thank you..
//GETTING output
{
d: "Authorized"
}
//expected output
{
Message: "Authorized"
}
i m new to wcf so it will be helpful if i get undertandable suggestion
thank you..

The variable d is there for security reasons.
But you can always return an object instead of a string
public object CheckAuth(String AccountID, String Password)
{
// .. snip
return new {
Message = message
};
}
If you call your service like this, it should return something like
{
"d" : {
"Message": "Authorized"
}
}
Not sure what you're using on the front-end, if you use jQuery you could make a wrapper around the ajax function:
function doAjax(url, data, cb) {
$.ajax({
url: url,
data: data,
success: function(data) {
cb(data.d);
}
});
}
and make use of your new defined function like this:
doAjax('/CheckAuth', yourDataObj, function result(data) {
console.log(data.Message);
});

How to pass value from client side to server side in asp.net?

how to pass the value in below script to the server side
// listen for and handle auth.statusChange events
FB.Event.subscribe('auth.statusChange', function(response) {
if (response.authResponse) {
FB.api('/me', function(me) {
document.getElementById('auth-displayname').innerHTML = me.name;
document.getElementById('Email').innerHTML = me.email;
document.getElementById('gender').innerHTML = me.gender;
document.getElementById('birth').innerHTML = me.birthday;
document.getElementById('firstname').innerHTML = me.first_name;
})

Javascript variables exist on the client so in order to get those values into the server you'll need to execute a request from the client.You probably want an approach called AJAX. AJAX involves Javascript making requests to the server in the background of your page. You'll set up a C# web page that expects these background requests. If you use a GET request then then place the variables in the query string of your AJAX request to your new C# page. If you want to use a POST request then you'll set parameters in the data that you post to your page.
Libraries like jQuery make this kind of thing pretty simple.

In webform2.aspx
<script type="text/javascript">
function LoadValues(me) {
{
var Email = me.email;
var Name = me.name;
var Id = me.id;
var Dob = me.birthday;
var Gender = me.gender;
alert(Email)
document.getElementById('auth-loggedout').style.display = 'none';
document.getElementById('auth-loggedin').style.display = 'block';
var data2Send = '{"fbemail": '+Email+', "fbname":'+Name+', "fbid":'+Id+',"fbname":'+Dob+',"fbname":'+Name+' }';
$.ajax({
type: "POST",
url: 'webform2.aspx/Testmethod',
data: data2Send,
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (arg) {console.log(arg) //call successfull
$("#lbltxt").text(arg);
},
error: function (xhr) {
alert(xhr); //error occurred
}
});
}
</script>
In webform2.aspx.cs
[System.Web.Services.WebMethod]
public static string TestMethod(string fbid, string fbemail, string fbsex, string fbdob)
{
SqlConnection con = new SqlConnection();
SqlCommand cmd = new SqlCommand();
SqlDataReader datareader;
con = new SqlConnection(".......");
cmd = new SqlCommand("SpFacebookInfo", con);
con.Open();
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#FbId", fbid);
cmd.Parameters.AddWithValue("#FbEmail", fbemail);
cmd.Parameters.AddWithValue("#FbSex", fbsex);
cmd.Parameters.AddWithValue("#FbDob", fbdob);
datareader = cmd.ExecuteReader();
datareader.Close();
return fbemail;
}
}

Set the value in a hidden variable as u did and do a document.myform.submit();
to go to Page_Load and read the variables