各位大哥帮我看下这是怎么回事,一运行就出现下面错误“找不到类型或命名空间名称“BL”(是否缺少 using 指令或程序集引用?)”dal类库代码
using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
namespace DAL
{ public class DataAgent {
private SqlConnection sqlcon;
#region 打开数据库
/// <summary>
/// 打开数据库
/// </summary>
public void sqlOpen()
{
try { sqlcon = new SqlConnection(ConfigurationSettings.AppSettings["constr"]);
if (sqlcon.State != ConnectionState.Open)
{ sqlcon.Open(); }
}
catch(Exception e) {
throw e;
} }
#endregion
#region 关闭数据库
/// <summary>
/// 关闭数据库
/// </summary>
public void sqlClose()
{
if (sqlcon != null)
{ sqlcon.Close(); }
}
#endregion
#region 学生信息
/// <summary>
///
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public DataView dv(string sql)
{
sqlOpen();
SqlDataAdapter myda = new SqlDataAdapter(sql .Trim (),sqlcon );
DataSet myds = new DataSet();
myda.Fill(myds );
return myds.Tables[0].DefaultView;
}
#endregion
}
}
BL类库代码
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using DAL;
namespace BL
{
public class Stuinfo
{
public DataView stuinfo()
{
string sql = "select * from stuinfo ";
DataAgent da = new DataAgent();
return da.dv(sql);
}
}
}
页面.cs中的代码
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using BL;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Stuinfo stu=new Stuinfo ();
GridView1.DataSource = stu.stuinfo ();
GridView1 .DataBind ();}
}
}
using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
namespace DAL
{ public class DataAgent {
private SqlConnection sqlcon;
#region 打开数据库
/// <summary>
/// 打开数据库
/// </summary>
public void sqlOpen()
{
try { sqlcon = new SqlConnection(ConfigurationSettings.AppSettings["constr"]);
if (sqlcon.State != ConnectionState.Open)
{ sqlcon.Open(); }
}
catch(Exception e) {
throw e;
} }
#endregion
#region 关闭数据库
/// <summary>
/// 关闭数据库
/// </summary>
public void sqlClose()
{
if (sqlcon != null)
{ sqlcon.Close(); }
}
#endregion
#region 学生信息
/// <summary>
///
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public DataView dv(string sql)
{
sqlOpen();
SqlDataAdapter myda = new SqlDataAdapter(sql .Trim (),sqlcon );
DataSet myds = new DataSet();
myda.Fill(myds );
return myds.Tables[0].DefaultView;
}
#endregion
}
}
BL类库代码
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using DAL;
namespace BL
{
public class Stuinfo
{
public DataView stuinfo()
{
string sql = "select * from stuinfo ";
DataAgent da = new DataAgent();
return da.dv(sql);
}
}
}
页面.cs中的代码
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using BL;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Stuinfo stu=new Stuinfo ();
GridView1.DataSource = stu.stuinfo ();
GridView1 .DataBind ();}
}
}
解决方案 »
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