我有一个三层架构的 asp.net 项目。我在解决方案中添加了业务访问层 (BAL) 和数据访问层 (DAL) 作为类库，并且在 BAL 中添加了 DAL 的引用，在 UI 中添加了 BAL 的引用。
我已经在 BAL 的一个类中编写了一些方法，它工作正常，但现在我正在向任何 BAL 类添加新方法，并在 UI 中访问新添加的方法。因此，在 UI 中无法访问新添加的方法，并且它给了我错误
“BAL.TaskBAL”不包含“deleteSelectedTaskBAL”的定义，并且找不到接受“BAL.TaskBAL”类型的第一个参数的扩展方法“deleteSelectedTaskBAL”（您是否缺少 using 指令或程序集引用？）
D： \Mohsin\CurrentlyWorking\ManageTaskBALDAL\AdminHomePage.aspx.cs
这deleteSelectedBAL是新添加的方法
在这里你可以尝试两件事
1) 从 UI 文件夹的 bin 中删除 .dll 文件，然后尝试再次添加。2）您可以通过右键单击解决方案来设置项目依赖关系。那么你不需要一次又一次地添加
我过去曾遇到过这个问题。有时清理和重建 BAL 项目也有帮助。
还要确保您在调用该方法的代码文件中使用命名空间。
namespace BLL
{
public class tblSubCategory
{
public tblSubCategory()
{
//
// TODO: Add constructor logic here
//
}
private int iSubCatId;
private string sSubCatName;
private string sImagePath;
private int iCategoryId;
private string sDescription;
private decimal decPrice;
private int sCategoryName;
public int SubCatId
{
get
{ return iSubCatId; }
set
{ iSubCatId = value; }
}
public string SubCatName
{
get
{
return sSubCatName;
}
set
{ sSubCatName = value; }
}
public string ImagePath
{
get
{
return sImagePath;
}
set
{ sImagePath = value; }
}
public int CategoryId
{
get
{
return iCategoryId;
}
set
{ iCategoryId = value; }
}
public string Description
{
get
{ return sDescription; }
set
{ sDescription = value; }
}
public decimal Price
{
get
{ return decPrice; }
set
{ decPrice = value; }
}
public int CategoryName
{
get
{
return sCategoryName;
}
set
{ sCategoryName = value; }
}
public int InserttblSubCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@sSubCatName", sSubCatName);
db.AddParameter("@sImagePath", sImagePath);
db.AddParameter("@iCategoryId", iCategoryId);
db.AddParameter("@sDescription", sDescription);
db.AddParameter("@decPrice", decPrice);
return db.ExecuteNonQuery("[tblSubCategory_Insert]", true);
}
public DataSet SelectAlltblSubCategory()
{
DBAccess db = new DBAccess();
//db.AddParameter("@iSubCatId", iSubCatId);
//return db.ExecuteDataSet("tblSubCategory_SelectAllForDDL");
return db.ExecuteDataSet("tblSubCategory_SelectAll");
}
public int UpdatetblSubCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@iSubCatId", iSubCatId);
db.AddParameter("@sSubCatName", sSubCatName);
//db.AddParameter("@sImagePath", sImagePath);
//db.AddParameter("@iCategoryId", iCategoryId);
db.AddParameter("@sDescription", sDescription);
db.AddParameter("@decPrice", decPrice);
return db.ExecuteNonQuery("[tblSubCategory_Update]", true);
}
public int DeletetblSubCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@iSubCatId", iSubCatId);
return db.ExecuteNonQuery("[tblSubCategory_Delete]", true);
}
public DataSet SubCategoryAscByCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", CategoryId);
return db.ExecuteDataSet("[tblSubCategory_SelectAsc]");
}
public DataSet SubCategoryDescByCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", CategoryId);
return db.ExecuteDataSet("[tblSubCategory_SelectDescPrice]");
}
public DataSet InnerjointblSubCategory1()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", CategoryId);
return db.ExecuteDataSet("[tblSubCategory_InnerJoin1]");
}
public DataSet SelectDesctblSubCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", iCategoryId);
//db.AddParameter("@sSubCatName", sSubCatName);
return db.ExecuteDataSet("tblSubCategory_SelectDesc");
}
public DataSet SelectSubCatName()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", iCategoryId);
return db.ExecuteDataSet("tblSubCategory_SelectSubCatName");
}
public DataSet SelectProductsBySubCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@iSubCatId", iSubCatId);
return db.ExecuteDataSet("tblProduct_ProductBySubCat");
}
public DataSet selectallsub()
{
DBAccess db = new DBAccess();
//db.AddParameter("@iSubCatId", iSubCatId);
//return db.ExecuteDataSet("tblSubCategory_SelectAllForDDL");
return db.ExecuteDataSet("tblSubCategory_InnerJoin2");
}
public DataSet selectallsubasc()
{
DBAccess db = new DBAccess();
//db.AddParameter("@iSubCatId", iSubCatId);
//return db.ExecuteDataSet("tblSubCategory_SelectAllForDDL");
return db.ExecuteDataSet("tblSubCategory_InnerJoinDesc");
}
public DataSet SelectSubCategoryBySubCatId()
{
DBAccess db = new DBAccess();
db.AddParameter("@iSubCatId", iSubCatId);
return db.ExecuteDataSet("tblSubCategory_ddlProduct");
}
public DataSet SelectSubCategoryByCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", iCategoryId);
return db.ExecuteDataSet("tblSubCategory_SelectSubCategoryByCategory");
}
public DataSet GetSubCategory()
{
DBAccess db = new DBAccess();
db.AddParameter("@sSubCatName", sSubCatName);
return db.ExecuteDataSet("tblSubCategory_SelectSname");
}
public DataSet SubCategoryByCatAsc()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", iCategoryId);
return db.ExecuteDataSet("tblSubCategory_asc");
}
public DataSet SubCategoryByCatDesc()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", iCategoryId);
return db.ExecuteDataSet("tblSubCategory_desc");
}
public DataSet CategoryByCatId()
{
DBAccess db = new DBAccess();
db.AddParameter("@iCategoryId", iCategoryId);
return db.ExecuteDataSet("tblCategory_SelectAllCat");
}
public DataSet InnerjointblSubCategoryTop3()
{
DBAccess db = new DBAccess();
//db.AddParameter("@sCategoryName", CategoryName);
db.AddParameter("@iCategoryId", CategoryId);
return db.ExecuteDataSet("[tblSubCategory_InnerJoinTop3]");
}
}
}
是对项目或作为项目构建工件的程序集的引用。如果您的参考是构建工件，那么您的依赖链就被破坏了。删除参考并添加项目参考。