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ASP.Net学习之常用模块整理(1)

作者:admin 日期:2006-05-17

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每做完一个项目,就可以有很多的经验跟技巧学到,感谢公司能给我这么一个机会做这么一个大项目,让我从一个从刚学会一点ASP.Net的菜鸟过渡到可以用c#正常手写相关常用模块的一个真正的程序员,一个人做项目可以学得很多很多的东西,当然其中碰到困难也只能靠自己一个人去解决.为了让大家更好的学习,我把常用的模块写成一个个方法,希望能对大家有用.每个人都有不同的算法跟代码习惯,而且个人水平有限,欢迎大家多多指正.

前提准备:
由于项目是采用SQL数据库,所以我们先在web.config中设置好数据库连接




  之后在CS代码中要注意引用

  c#
  using System.Data.Sqlclient;
  using System.Data;
  using System.Configuration;

  vb.net

  Imports System.Data.Sqlclient
  Imports System.Data
  Imports System.Configuration

以下就是常用的模块

1.会员登陆模块

用户控件:
TextBox:TxtUser 用户名  TxtPwd 密码
Label:LblError 错误提示

存储过程:user_login

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程序代码

CREATE procedure user_login
@user_name varchar(50),
@user_password varchar(50)
as
select * from userwhere [User_Name] = @User_Name and [User_Pwd] = @User_Password
if @@rowcount>0
begin

update [users] set user_LoginTimes=user_LoginTimes+1 where [User_Name] = @User_Name and [User_Pwd] = @User_Password

end
GO

C#.Net

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程序代码

Private void memberlogin()
{
SqlConnection conndb=new SqlConnection(ConfigurationSettings.AppSettings["Conn"]);
   conndb.Open();
SqlCommand cmdlogin = new SqlCommand("User_login",conndb);
cmdlogin.CommandType = CommandType.StoredProcedure;
cmdlogin.Parameters.Add("@user_name",TxtUser.Text.Trim());
cmdlogin.Parameters.Add("@user_password",TxtPwd.Text.Trim());
SqlDataReader reader=cmdlogin.ExecuteReader();
if(reader.Read())
{
                Session["user"]=reader["user_id"].ToString();
                Session["com"]=reader["com_id"].ToString();

                string url;
                url="../user/index.aspx?userid="+ Session["userid"] +"&comid="+ Session["comid"] +"";
                Response.Redirect(url);
            }
            else
            {
                LblError.Text ="Invalid Username or password！Please try again!";

            }

}

VB.Net

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程序代码

Private  Sub memberlogin()
Dim conndb As SqlConnection = New SqlConnection(ConfigurationSettings.AppSettings("Conn"))
   conndb.Open()
Dim cmdlogin As SqlCommand =  New SqlCommand("User_login",conndb)
cmdlogin.CommandType = CommandType.StoredProcedure
cmdlogin.Parameters.Add("@user_name",TxtUser.Text.Trim())
cmdlogin.Parameters.Add("@user_password",TxtPwd.Text.Trim())
Dim reader As SqlDataReader = cmdlogin.ExecuteReader()
If reader.Read() Then
                Session("user")=reader("user_id").ToString()
                Session("com")=reader("com_id").ToString()

                Dim url As String
                url="../user/index.aspx?userid="+ Session("userid") +"&comid="+ Session("comid") +""
                Response.Redirect(url)
Else
                LblError.Text ="Invalid Username or password！Please try again!"

End If

End Sub

2.验证注册用户是否存在

用户控件:
TextBox: TxtMemberID
Label: LblChk

c#代码:

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程序代码

private bool idcheck()
        {
            SqlConnection conndb= new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);
            conndb.Open();
            string memberid=TxtMemberId.Text.Trim();
            string sql="select User from users where User_Name ='"+memberid+"'";
            SqlCommand strchk=new SqlCommand(sql,conndb);
            SqlDataReader reader=strchk.ExecuteReader();
            if(reader.Read())
            {

                LblChk.Text="Sorry! this memberid was registed,Please choose another!";



                Response.Write("");



                Response.End();



                return false;

            }
            else
            {
                return true;
            }

VB.Net 代码

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程序代码

private Boolean idcheck()
        {
            Dim conndb As SqlConnection =  New SqlConnection(System.Configuration.ConfigurationSettings.AppSettings("conn"))
            conndb.Open()
            Dim memberid As String = TxtMemberId.Text.Trim()
            Dim sql As String = "select User from users where User_Name ='"+memberid+"'"
            Dim strchk As SqlCommand = New SqlCommand(sql,conndb)
            Dim reader As SqlDataReader = strchk.ExecuteReader()
            If reader.Read() Then

                LblChk.Text="Sorry! this memberid was registed,Please choose another!"

                Response.Write("")

                Response.End()

                Return False

            Else
                Return True
            End If

3.新用户注册

用户控件:
TextBox:TxtMemberId TxtPwd TxtEmail
ListBox:LstIndustry

存储过程:Users_Insert

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程序代码

/*
作者：dezai
用途：新进会员的增加注册,同时注册与其相关的企业名录
日期：2006-3-1
*/

CREATE PROCEDURE Users_Insert
@User_Id int output,
@User_Type bit,
@User_Name char(100),
@User_Pwd  char(100),
@User_Email char(100)
AS
   begin tran

    INSERT INTO [Users]
    (
    [user_type],
    [user_name],
    [user_pwd],
    [user_Email]
)

values
(
@User_Type,
@User_Name,
@User_Pwd,
@User_Email
)

if @@error<>0 goto error
set @user_Id=@@identity

Commit tran
return
ERROR:
    set @User_Id = 0
    rollback tran
GO

c#代码:

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程序代码

private void reguser()
{
SqlConnection conndb=new SqlConnection(ConfigurationSettings.AppSettings["Conn"]);

                SqlCommand cmdinsert = new SqlCommand("Users_Insert",conndb);

                cmdinsert.CommandType=CommandType.StoredProcedure;

                int intAuthorCount;
                cmdinsert.Parameters.Add("@User_Name",TxtMemberId.Text.ToString());
                cmdinsert.Parameters.Add("@User_Pwd",TxtPwd.Text.ToString());
                cmdinsert.Parameters.Add("@User_Email",TxtEmail.Text.ToString());
                cmdinsert.Parameters.Add("@User_Industry",LstIndustry.SelectedValue);
            SqlParameter  parmReturnValue = new SqlParameter("@User_id", SqlDbType.Int);
            parmReturnValue.Direction = ParameterDirection.Output;
            cmdinsert.Parameters.Add(parmReturnValue);
                conndb.Open();
                cmdinsert.ExecuteNonQuery();
                 intAuthorCount = (int)cmdinsert.Parameters[ "@user_id"].Value;
                             conndb.Close();


}

VB.Net代码

复制内容到剪贴板

程序代码

Private  Sub reguser()
Dim conndb As SqlConnection = New SqlConnection(ConfigurationSettings.AppSettings("Conn"))

                Dim cmdinsert As SqlCommand =  New SqlCommand("Users_Insert",conndb)

                cmdinsert.CommandType=CommandType.StoredProcedure

                Dim intAuthorCount As Integer
                cmdinsert.Parameters.Add("@User_Name",TxtMemberId.Text.ToString())
                cmdinsert.Parameters.Add("@User_Pwd",TxtPwd.Text.ToString())
                cmdinsert.Parameters.Add("@User_Email",TxtEmail.Text.ToString())
                cmdinsert.Parameters.Add("@User_Industry",LstIndusTry.SelectedValue)
            Dim parmReturnValue As SqlParameter =  New SqlParameter("@User_id",SqlDbType.Int)
            parmReturnValue.Direction = ParameterDirection.Output
            cmdinsert.Parameters.Add(parmReturnValue)
                conndb.Open()
                cmdinsert.ExecuteNonQuery()
                 intAuthorCount = CType(cmdinsert.Parameters( "@user_id").Value, Integer)
                             conndb.Close()

End Sub

4.图片上传

c#.Net

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程序代码

private void uppic()
        {

             string mPath;
   string imagePath;
   string imageType;
   string imageName;
    DateTime dtmDate;

    dtmDate = DateTime.Now;

            if(""!=this.fileup.PostedFile.FileName)
            {
                imagePath = this.fileup.PostedFile.FileName;

                imageType = imagePath.Substring(imagePath.LastIndexOf(".")+1);

                imageName=imagePath.Substring(imagePath.LastIndexOf("\\")+1);

                if("jpg" != imageType && "gif" !=imageType && "png" !=imageType && "PNG" !=imageType && "GIF" !=imageType && "JPG" !=imageType)
                {
                    Response.Write("");

                    return;
                }
                else

                {
                    try
                    {

                        mPath=Server.MapPath("upfile");

                        this.fileup.PostedFile.SaveAs(mPath+"\\"+"dezaistudio"+dtmDate.ToString("yyyyMMddhhmmss")+imageName);

                        this.ImageSmall.ImageUrl  = "dezaistudio"+dtmDate.ToString("yyyyMMddhhmmss")+imageName;


                        Response.Write("");

                        TxtPicPath.Text = this.ImageSmall.ImageUrl.ToString().Trim();


                    }
                    catch
                    {
                        Response.Write("error");
                    }
                }
            }



        }

VB.Net代码

复制内容到剪贴板

程序代码

Private  Sub uppic()

             Dim mPath As String
   Dim imagePath As String
   Dim imageType As String
   Dim imageName As String
    Dim dtmDate As DateTime

    dtmDate = DateTime.Now

            If ""<>Me.fileup.PostedFile.FileName Then
                imagePath = Me.fileup.PostedFile.FileName

                imageType = imagePath.Substring(imagePath.LastIndexOf(".")+1)

                imageName=imagePath.Substring(imagePath.LastIndexOf("\\")+1)

                If "jpg" <> imageType And "gif" <>imageType And "png" <>imageType And "PNG" <>imageType And "GIF" <>imageType And "JPG" <>imageType Then
                    Response.Write("")

                    Return
                Else
                    Try

                        mPath=Server.MapPath("upfile")

                        Me.fileup.PostedFile.SaveAs(mPath+"\\"+"dezaistudio"+dtmDate.ToString("yyyyMMddhhmmss")+imageName)

                        Me.ImageSmall.ImageUrl  = "dezaistudio"+dtmDate.ToString("yyyyMMddhhmmss")+imageName

                        Response.Write("")

                        TxtPicPath.Text = Me.ImageSmall.ImageUrl.ToString().Trim()

                    Catch
                        Response.Write("error")
                    End Try
                End If
            End If

End Sub

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ASP.Net学习之常用模块整理(1)

作者:admin 日期:2006-05-17

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