m getting the below error when I delete a record from the table in mvc The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult DeleteUserDetails(Int32, nsroute.DataAccess.UserModel)' in 'nnnnn.Controllers.AccountController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter. Parameter name: parameters This is a method for delete public static int DeleteUserDetails( int id ) { int rowAffected = 0; using (IDbConnection con = new SqlConnection(ConnectionString)) { if (con.State == ConnectionState.Closed) con.Open(); DynamicParameters parameters = new DynamicParameters(); parameters.Add( "@Id" , id); rowAffected = con.Execute( "DeleteGroupMeeting" , parameters, commandType: CommandType.StoredProcedure); } return rowAffected; } This is the controller part public ActionResult DeleteUserDetails( int id,UserModel usermodel) { if (UserModel.DeleteUserDetails(id)>0) { return RedirectToAction( "Dashboard" , "Home" ); } return RedirectToAction( "Dashboard" , "Home" ); } this is code for button "@Url.Action(" DeleteUserDetails "," Account ", new {item.UserId})" >Delete

Please check your id is not null,also in your action method mark parameter with ? symbol to make it nullable type, if it can be null. public ActionResult(int? Id, className obj) {}

Answer

The parameters dictionary contains a null entry for parameter 'id'

yash patel

10.1k

m getting the below error when I delete a record from the table in mvc

The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult DeleteUserDetails(Int32, nsroute.DataAccess.UserModel)' in 'nnnnn.Controllers.AccountController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.

Parameter name: parameters

This is a method for delete

public static int DeleteUserDetails( int id )
{
int rowAffected = 0;
using (IDbConnection con = new SqlConnection(ConnectionString))
{
if (con.State == ConnectionState.Closed)
con.Open();
DynamicParameters parameters = new DynamicParameters();
parameters.Add("@Id", id);
rowAffected = con.Execute("DeleteGroupMeeting", parameters, commandType: CommandType.StoredProcedure);
}
return rowAffected;
}