BC30516: Overload Resolution Failed Because No Accessible 'New' Accepts This Number Of Arguments Error
Feb 18, 2008
Hello, I want to get data from datatable as below. I am getting error:
BC30516: Overload resolution failed because no accessible 'New' accepts this number of arguments. I did not understand what is wrong. Because everything is same as msdn library.
my codebehind is:
Imports System.Data
Imports System.Data.Sql
Imports System.Data.SqlClientPartial Class Default2 Inherits System.Web.UI.Page
Private Shared Function GetConnectionString() As String
' To avoid storing the connection string in your code,
' you can retrieve it from a configuration file.
Return "Data Source=Database;Initial Catalog=otel;Integrated Security=True;Pooling=False"
End FunctionProtected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.LoadDim connectionString As String = _
GetConnectionString()
' Create a SqlConnection to the database.Using connection As SqlConnection = New SqlConnection(connectionString)
' Create a SqlDataAdapter for the Suppliers table.Dim mailsAdapter As SqlDataAdapter = _ New SqlDataAdapter()
' A table mapping names the DataTable.mailsAdapter.TableMappings.Add("Table", "Pages")
connection.Open()Dim PagesCommand As SqlCommand = New SqlCommand( _"SELECT * FROM Pages", _
connection)
PagesCommand.CommandType = CommandType.Text
' Set the SqlDataAdapter's SelectCommand.
mailsAdapter.SelectCommand = PagesCommand
' Fill the DataSet.
Dim dataSet1 As Dataset = New Dataset("Pages") 'ERROR MESSAGE HERE...........................................mailsAdapter.Fill(dataSet1)
connection.Close()LblPageName.Text = CStr(dataSet1.Tables("Pages").Rows(0).Item(1))
TxtPageTitle.Text = CStr(dataSet1.Tables("Pages").Rows(0).Item(2))TxtPageSummary.Text = CStr(dataSet1.Tables("Pages").Rows(0).Item(3))
Rte1.Text = CStr(dataSet1.Tables("Pages").Rows(0).Item(4))TxtPageimgUrl.Text = CStr(dataSet1.Tables("Pages").Rows(0).Item(5))
End Using
End Sub
End Class
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May 19, 2008
Dear All,
I have a problem while trying to update the content of my page to the database by the means of a stored procedure
string OcompConnection = ConfigurationManager.ConnectionStrings["GenUserCode"].ConnectionString;
System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(OcompConnection);
System.Data.SqlClient.SqlCommand ocmd = new System.Data.SqlClient.SqlCommand("Dealer_Insert", conn);ocmd.CommandType = CommandType.StoredProcedure;
ocmd.Parameters.Add(new SqlParameter("@UserCode"), SqlDbType.NVarChar);
ocmd.Parameters["@UserCode"] = TxtUserCode;
and also there is another error message saying that argument1: can not comvert from system.data.sqlclient.sqlparameter to string.
What am i Missing???
Eventually there is the try{open} and finally{close}
Many Thanks
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May 31, 2008
I have problem with LINQ. I have created SQL Server 2005 database Database.mdf in App_Data folder with two tables - Pages and PagesGroups. Table Pages consist of fields PageID, AspxForm, DescriptionEN, DescriptionPL, PagesGroupID, NavNameEN, NavNamePL, PageActive, NavToolTipEN, NavToolTipPL and table PagesGroups consist of PagesGroupID, NavGroupNameEN, NavGroupNamePL, NavGroupToolTipEN, NavGroupToolTipPL, GroupDescriptionPL, GroupDescriptionEN, GroupActive. I added example rows. I created DataClasses.dbml, where Pages is child of PagesGroups, and DataClasses.designer.cs, which cause error "No overload for method 'DataContext' takes '0' arguments", in App_Code folder. I started writing LINQ commands in master page (DataClassesDataContext db = new DataClassesDataContext(); var pages = from p in db.Pages select new { Description = p.PagesGroup.GroupDescriptionPL };).
What should I write in DataClasses.designer.cs that errors does not occur? What is wrong in my DataClasses.designer.cs?
I wrote source of DataClasses.designer.cs, MasterPage.master and error message below.
App_Code/DataClasses.designer.cs:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.Linq;
using System.Data.Linq.Mapping;
using System.Linq;
using System.Linq.Expressions;using System.Reflection;
[System.Data.Linq.Mapping.DatabaseAttribute(Name="Database")]
public partial class DataClassesDataContext : System.Data.Linq.DataContext
{
private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource();
public System.Data.Linq.Table<Page> Pages
{
get
{return this.GetTable<Page>();
}
}
public System.Data.Linq.Table<PagesGroup> PagesGroups
{
get
{return this.GetTable<PagesGroup>();
}
}
}
[Table(Name="dbo.Pages")]
public partial class Page : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private int _PageID;
private string _AspxForm;
private string _DescriptionEN;
private string _DescriptionPL;
private int _PagesGroupID;
private string _NavNameEN;
private string _NavNamePL;
private bool _PageActive;
private string _NavToolTipEN;
private string _NavToolTipPL;
private EntityRef<PagesGroup> _PagesGroup;
public Page()
{
this._PagesGroup = default(EntityRef<PagesGroup>);
}
[Column(Storage="_PageID", AutoSync=AutoSync.Always, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)]
public int PageID
{
get
{
return this._PageID;
}
set
{
if ((this._PageID != value))
{
this.SendPropertyChanging();
this._PageID = value;
this.SendPropertyChanged("PageID");
}
}
}
[Column(Storage="_AspxForm", DbType="Char(10) NOT NULL", CanBeNull=false)]
public string AspxForm
{
get
{
return this._AspxForm;
}
set
{
if ((this._AspxForm != value))
{
this.SendPropertyChanging();
this._AspxForm = value;
this.SendPropertyChanged("AspxForm");
}
}
}
[Column(Storage="_DescriptionEN", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string DescriptionEN
{
get
{
return this._DescriptionEN;
}
set
{
if ((this._DescriptionEN != value))
{
this.SendPropertyChanging();
this._DescriptionEN = value;
this.SendPropertyChanged("DescriptionEN");
}
}
}
[Column(Storage="_DescriptionPL", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string DescriptionPL
{
get
{
return this._DescriptionPL;
}
set
{
if ((this._DescriptionPL != value))
{
this.SendPropertyChanging();
this._DescriptionPL = value;
this.SendPropertyChanged("DescriptionPL");
}
}
}
[Column(Storage="_PagesGroupID", DbType="Int NOT NULL")]
public int PagesGroupID
{
get
{
return this._PagesGroupID;
}
set
{
if ((this._PagesGroupID != value))
{
if (this._PagesGroup.HasLoadedOrAssignedValue)
{
throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
}
this.SendPropertyChanging();
this._PagesGroupID = value;
this.SendPropertyChanged("PagesGroupID");
}
}
}
[Column(Storage="_NavNameEN", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string NavNameEN
{
get
{
return this._NavNameEN;
}
set
{
if ((this._NavNameEN != value))
{
this.SendPropertyChanging();
this._NavNameEN = value;
this.SendPropertyChanged("NavNameEN");
}
}
}
[Column(Storage="_NavNamePL", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string NavNamePL
{
get
{
return this._NavNamePL;
}
set
{
if ((this._NavNamePL != value))
{
this.SendPropertyChanging();
this._NavNamePL = value;
this.SendPropertyChanged("NavNamePL");
}
}
}
[Column(Storage="_PageActive", DbType="Bit NOT NULL")]
public bool PageActive
{
get
{
return this._PageActive;
}
set
{
{
this.OnPageActiveChanging(value);
this.SendPropertyChanging();
this._PageActive = value;
this.SendPropertyChanged("PageActive");
}
}
}
private void OnPageActiveChanging(bool value)
{
throw new NotImplementedException();
}
[Column(Storage="_NavToolTipEN", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string NavToolTipEN
{
get
{
return this._NavToolTipEN;
}
set
{
if ((this._NavToolTipEN != value))
{
this.SendPropertyChanging();
this._NavToolTipEN = value;
this.SendPropertyChanged("NavToolTipEN");
}
}
}
[Column(Storage="_NavToolTipPL", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string NavToolTipPL
{
get
{
return this._NavToolTipPL;
}
set
{
if ((this._NavToolTipPL != value))
{
this.SendPropertyChanging();
this._NavToolTipPL = value;
this.SendPropertyChanged("NavToolTipPL");
}
}
}
[Association(Name="PagesGroup_Page", Storage="_PagesGroup", ThisKey="PagesGroupID", IsForeignKey=true)]
public PagesGroup PagesGroup
{
get
{
return this._PagesGroup.Entity;
}
set
{
PagesGroup previousValue = this._PagesGroup.Entity;
if (((previousValue != value)
|| (this._PagesGroup.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._PagesGroup.Entity = null;
previousValue.Pages.Remove(this);
}
this._PagesGroup.Entity = value;
if ((value != null))
{
value.Pages.Add(this);
this._PagesGroupID = value.PagesGroupID;
}
else
{
this._PagesGroupID = default(int);
}
this.SendPropertyChanged("PagesGroup");
}
}
}
public event PropertyChangingEventHandler PropertyChanging;
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void SendPropertyChanging()
{
if ((this.PropertyChanging != null))
{
this.PropertyChanging(this, emptyChangingEventArgs);
}
}
protected virtual void SendPropertyChanged(String propertyName)
{
if ((this.PropertyChanged != null))
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
[Table(Name="dbo.PagesGroups")]
public partial class PagesGroup : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private int _PagesGroupID;
private string _NavGroupNameEN;
private string _NavGroupNamePL;
private string _NavGroupToolTipEN;
private string _NavGroupToolTipPL;
private string _GroupDescriptionEN;
private string _GroupDescriptionPL;
private bool _GroupActive;
private EntitySet<Page> _Pages;
public PagesGroup()
{
this._Pages = new EntitySet<Page>(new Action<Page>(this.attach_Pages), new Action<Page>(this.detach_Pages));
}
[Column(Storage="_PagesGroupID", AutoSync=AutoSync.Always, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)]
public int PagesGroupID
{
get
{
return this._PagesGroupID;
}
set
{
if ((this._PagesGroupID != value))
{
this.SendPropertyChanging();
this._PagesGroupID = value;
this.SendPropertyChanged("PagesGroupID");
}
}
}
[Column(Storage="_NavGroupNameEN", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string NavGroupNameEN
{
get
{
return this._NavGroupNameEN;
}
set
{
if ((this._NavGroupNameEN != value))
{
this.SendPropertyChanging();
this._NavGroupNameEN = value;
this.SendPropertyChanged("NavGroupNameEN");
}
}
}
[Column(Storage="_NavGroupNamePL", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string NavGroupNamePL
{
get
{
return this._NavGroupNamePL;
}
set
{
if ((this._NavGroupNamePL != value))
{
this.SendPropertyChanging();
this._NavGroupNamePL = value;
this.SendPropertyChanged("NavGroupNamePL");
}
}
}
[Column(Storage="_NavGroupToolTipEN", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string NavGroupToolTipEN
{
get
{
return this._NavGroupToolTipEN;
}
set
{
if ((this._NavGroupToolTipEN != value))
{
this.SendPropertyChanging();
this._NavGroupToolTipEN = value;
this.SendPropertyChanged("NavGroupToolTipEN");
}
}
}
[Column(Storage="_NavGroupToolTipPL", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string NavGroupToolTipPL
{
get
{
return this._NavGroupToolTipPL;
}
set
{
if ((this._NavGroupToolTipPL != value))
{
this.SendPropertyChanging();
this._NavGroupToolTipPL = value;
this.SendPropertyChanged("NavGroupToolTipPL");
}
}
}
[Column(Storage="_GroupDescriptionEN", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string GroupDescriptionEN
{
get
{
return this._GroupDescriptionEN;
}
set
{
if ((this._GroupDescriptionEN != value))
{
this.SendPropertyChanging();
this._GroupDescriptionEN = value;
this.SendPropertyChanged("GroupDescriptionEN");
}
}
}
[Column(Storage="_GroupDescriptionPL", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string GroupDescriptionPL
{
get
{
return this._GroupDescriptionPL;
}
set
{
if ((this._GroupDescriptionPL != value))
{
this.SendPropertyChanging();
this._GroupDescriptionPL = value;
this.SendPropertyChanged("GroupDescriptionPL");
}
}
}
[Column(Storage="_GroupActive", DbType="Bit NOT NULL")]
public bool GroupActive
{
get
{
return this._GroupActive;
}
set
{
if ((this._GroupActive != value))
{
this.SendPropertyChanging();
this._GroupActive = value;
this.SendPropertyChanged("GroupActive");
}
}
}
[Association(Name="PagesGroup_Page", Storage="_Pages", OtherKey="PagesGroupID")]
public EntitySet<Page> Pages
{
get
{
return this._Pages;
}
set
{
this._Pages.Assign(value);
}
}
public event PropertyChangingEventHandler PropertyChanging;
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void SendPropertyChanging()
{
if ((this.PropertyChanging != null))
{
this.PropertyChanging(this, emptyChangingEventArgs);
}
}
protected virtual void SendPropertyChanged(String propertyName)
{
if ((this.PropertyChanged != null))
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
private void attach_Pages(Page entity)
{
this.SendPropertyChanging();
entity.PagesGroup = this;
}
private void detach_Pages(Page entity)
{
this.SendPropertyChanging();
entity.PagesGroup = null;
}
}
MasterPage.master:
...
using System.Data.Linq;
using System.Data.Linq.Mapping;
using System.Globalization;
using System.Linq;
using System.Linq.Expressions;
...
public partial class MasterPage : System.Web.UI.MasterPage
{public void Page_Load(object sender, EventArgs e)
{
...
DataClassesDataContext db = new DataClassesDataContext();
...
if (Page.UICulture == "Polish")
{
...var pages = from p in db.Pages
where p.PagesGroup.GroupActive == true && p.PageActive == trueselect new { PagesGroupDescription = p.PagesGroup.GroupDescriptionPL };
}
else
{var pages = from p in db.Pages
where p.PagesGroup.GroupActive == true && p.PageActive == true
select new { PagesGroupDescription = p.PagesGroup.GroupDescriptionEN };
...
}
...
}
}
Error:
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS1501: No overload for method 'DataContext' takes '0' argumentsc:UsersAdministratorDocumentsMy Web SitesKamil Szmit (szmitek)App_CodeDataClasses.designer.cs(25,22): error CS1501: No overload for method 'DataContext' takes '0' arguments
c:WindowsassemblyGAC_MSILSystem.Data.Linq3.5.0.0__b77a5c561934e089System.Data.Linq.dll: (Location of symbol related to previous error)
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Thanks in advance
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