C# DataAccess.Connection方法代码示例

 public void load()
 {
     DataAccess data = new DataAccess();
     data.Connection();
     int id = Convert.ToInt32(Request.QueryString["id"].ToString());
     string sqlcom = "select mescontent, Username, mestime from [message] where goodsid=" + id;
     DataFill ds = new DataFill();
     ds.DataPage(sqlcom, DataList1, lblCurPage, lblTnum, lblEachPage, lnkFirst, lnkLast, lnkPrev, lnkNext, Request);
 }

 public void load()
 {
     DataAccess data = new DataAccess();
     data.Connection();
     string sqlcom = "select goodsid,goodsname,goodsprice,goodssort,connectpeople,phone from [Goods] ";
     SqlCommand cmd = data.excute(sqlcom);
     DataSet ds = data.Fill(cmd);
     GridView1.DataSource = ds.Tables[0].DefaultView;
     GridView1.DataBind();
 }

 protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
 {
     GridView1.PageIndex = e.NewPageIndex;
     DataAccess data = new DataAccess();
     data.Connection();
     string sqlcom = "select goodsid,goodsname,goodsprice,goodssort,connectpeople,phone from [Goods] ";
     SqlCommand cmd = data.excute(sqlcom);
     DataSet ds = data.Fill(cmd);
     GridView1.DataSource = ds.Tables[0].DefaultView;
     GridView1.DataBind();
 }

 protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
 {
     int num = e.RowIndex;
     DataAccess data = new DataAccess();
     data.Connection();
     DataTable dt=new DataTable();
     string godid = GridView1.Rows[num].Cells[0].Text.ToString();
     string sqlcom = "delete from [Goods] where goodsid='" + godid + "'";
     SqlCommand cmd = data.excute(sqlcom);
     Response.Write("<script language='javascript'>alert('删除成功!')</script>");
     load();
 }

 protected void Button1_Click(object sender, EventArgs e)
 {
     goodsid = Convert.ToInt32(Request.QueryString["id"].ToString());
     DataAccess data = new DataAccess();
     data.Connection();
     string a = DropDownList1.SelectedItem.Text;
     string name = Session["Username"].ToString();
     string filepath = HttpContext.Current.Server.MapPath("~/Images/");
     string filefullname = filepath + FileUpload1.FileName;
     string filelujing = "\\Images\\" + FileUpload1.FileName;
     FileUpload1.SaveAs(filefullname);//获取图片物理地址D:\My Documents\Visual Studio 2013\WebSites\WebSite1\Images
     sqlcom = "update [Goods] set [goodsname]='" + gName.Text.Trim() + "',[images]='" + filelujing + "',[goodsprice]='" + gMoney.Text.Trim() + "',[goodssort]='" + a + "',[connectpeople]='" + cname.Text.Trim() + "',[phone]='" + phone.Text.Trim() + "',[Username]='" + name + "',[details]='" + details.Text.Trim() + "' where goodsid=" + goodsid;
     SqlCommand cmd = data.excute(sqlcom);
     Response.Redirect("person.aspx");
 }

 protected void Button1_Click(object sender, EventArgs e)
 {
     if (Session["Username"] == null)
     {
         Response.Write("<script language='javascript'>alert('没有登录不能评论')</script>");
         return;
     }
     string time = DateTime.Now.ToLongDateString();
     DataAccess data = new DataAccess();
     data.Connection();
     string Username = Session["Username"].ToString();
     int id = Convert.ToInt32(Request.QueryString["id"].ToString());
     string sqlcom = "insert into [message] (mescontent,Username,goodsid,mestime) values ('" + Message.Text.Trim() + "','" + Username + "','" + id + "','" + time + "')";
     SqlCommand cmd = data.excute(sqlcom);
     Message.Text = "";
     load();
 }

 protected void Page_Load(object sender, EventArgs e)
 {
     String[] str = new String[] { "str1", "str2", "str3", "str4" };
     DataList[] list = new DataList[] { DataEle, DataBook, DataLife, DataOther };//创建datalist控件数组
     DataAccess data = new DataAccess();
     data.Connection();//链接数据库
     str[0] = "SELECT  goodsid,goodsname,goodsprice,images FROM [Goods] where goodssort='电子产品' order by goodsid desc";
     str[1] = "SELECT  goodsid,goodsname,goodsprice,images FROM [Goods] where goodssort='书籍' order by goodsid desc";
     str[2] = "SELECT  goodsid,goodsname,goodsprice,images FROM [Goods] where goodssort='生活用品' order by goodsid desc";
     str[3] = "SELECT  goodsid,goodsname,goodsprice,images FROM [Goods] where goodssort='其它' order by goodsid desc";
     for (int i = 0; i < 4; i++)
     {
         SqlCommand cmd = data.excute(str[i]);//执行sql语句;
         DataSet ds = data.Fill(cmd);
         list[i].DataSource = ds.Tables[0].DefaultView;
         list[i].DataBind();//数据绑定显示;
     }
 }

 protected void Button1_Click(object sender, EventArgs e)
 {
     DataAccess data = new DataAccess();
     string sqlcom = "select * from [Admin] where Adminid='" + FunStr(Adminname.Text.Trim()) + "'and Apassword='" + FunStr(Adminpwd.Text.Trim()) + "'";
     data.Connection();
     SqlCommand cmd = data.excute(sqlcom);
     DataSet ds = data.Fill(cmd);
     if (ds.Tables[0].Rows.Count > 0)
     {
         Session["Adminid"] = Adminname.Text.Trim();
         Response.Redirect("AdminDefault.aspx");
     }
     else
     {
         Label1.Text = "您的用户名或密码错误";
         Adminname.Text = "";
     }
 }

 protected void Button1_Click(object sender, EventArgs e)
 {
     DataAccess data = new DataAccess();
     data.Connection();
     string sqlcom = "select * from [User] where Username='" + Username.Text.Trim() + "'and Upassword='" + userpassword.Text.Trim() + "'";
     SqlCommand cmd = data.excute(sqlcom);
     DataSet ds = data.Fill(cmd);
     if (ds.Tables[0].Rows.Count > 0)
     {
         Session["Username"] = Username.Text.Trim();
         Response.Redirect("person.aspx");
     }
     else
     {
         Label1.Text = "您的用户名或密码错误";
         Username.Text = "";
     }
 }

 protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
 {
     if (e.Item.ItemIndex != -1 && e.CommandName == "DRdel")//判断索引和CommandName
     {
         int godid = Convert.ToInt32(MarketDetailDl.DataKeys[e.Item.ItemIndex].ToString());
         DataAccess data = new DataAccess();
         data.Connection();
         string sqlcom = "delete from [Goods] where goodsid='" + godid + "'";
         SqlCommand cmd = data.excute(sqlcom);
         Response.Write("<script language='javascript'>alert('删除成功!')</script>");
         load();
     }
     if (e.Item.ItemIndex != -1 && e.CommandName == "DRdel1")//判断索引和CommandName
     {
         int godid = Convert.ToInt32(MarketDetailDl.DataKeys[e.Item.ItemIndex].ToString());
         Response.Redirect("Update.aspx?id=" + godid + "");
     }
 }

    public void DataPage(string sqlcom, DataList MarketDetailDl, Label lblCurPage, Label lblTnum, Label lblEachPage, HyperLink lnkFirst, HyperLink lnkLast, HyperLink lnkPrev, HyperLink lnkNext, HttpRequest Request)
    {
        DataAccess data = new DataAccess();
        data.Connection();
        SqlCommand cmd = data.excute(sqlcom);
        DataSet ds = data.Fill(cmd);
        MarketDetailDl.DataSource = ds.Tables[0].DefaultView;
        MarketDetailDl.DataBind();
        PagedDataSource objPage = new PagedDataSource();//创建分页类
        objPage.DataSource = ds.Tables["Table"].DefaultView;//设置数据源

        objPage.AllowPaging = true;
        objPage.PageSize = 5;

        if (Request.QueryString["Page"] != null)
        {
            CurPage = Convert.ToInt32(Request.QueryString["Page"]);
            CurPage = Math.Min(CurPage, objPage.PageCount);
            CurPage = Math.Max(CurPage, 1);
        }
        else
            CurPage = 1;
        objPage.CurrentPageIndex = CurPage - 1;
        TotalPage = objPage.PageCount;
        Tnum = objPage.DataSourceCount;
        EachPage = objPage.Count;
        lblCurPage.Text = "第 " + CurPage.ToString() + " / " + TotalPage.ToString() + " 页";
        lblTnum.Text = "共: " + Tnum + " 条记录";
        lblEachPage.Text = "每页有: " + EachPage.ToString() + " 条记录";

        if (objPage.CurrentPageIndex != 0)
            lnkFirst.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurPage-CurPage +1);
        if (objPage.CurrentPageIndex != TotalPage - 1)
            lnkLast.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(TotalPage);

        if (!objPage.IsFirstPage)
            lnkPrev.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurPage - 1);
        if (!objPage.IsLastPage)
            lnkNext.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurPage + 1);

        MarketDetailDl.DataSource = objPage;
        MarketDetailDl.DataBind();
    }

 protected void Page_Load(object sender, EventArgs e)
 {
     if (Request.QueryString["id"] == null)
         Response.Redirect("Default.aspx");
     int id = Convert.ToInt32(Request.QueryString["id"].ToString());
     DataAccess data = new DataAccess();
     data.Connection();
     string sqlcom = "SELECT goodsname,goodsprice,phone,images,details FROM [Goods] where goodsid=" + id;
     SqlCommand cmd = data.excute(sqlcom);
     DataSet ds = data.Fill(cmd);
     gName.Text = ds.Tables[0].Rows[0][0].ToString();
     money.Text = ds.Tables[0].Rows[0][1].ToString();
     tel.Text = ds.Tables[0].Rows[0][2].ToString();
     Image1.ImageUrl = ds.Tables[0].Rows[0][3].ToString();
     Mes.Text = ds.Tables[0].Rows[0][4].ToString();
     string sqlcom1 = "select mescontent, Username, mestime  from [message] where goodsid=" + id;
     DataFill ds1 = new DataFill();
     ds1.DataPage(sqlcom1, DataList1, lblCurPage, lblTnum, lblEachPage, lnkFirst, lnkLast, lnkPrev, lnkNext, Request);
 }

 protected void Button1_Click(object sender, EventArgs e)
 {
     string time = DateTime.Now.ToLongDateString();
     DataAccess data = new DataAccess();
     data.Connection();
     string a = DropDownList1.SelectedItem.Text;
     string name = Session["Username"].ToString();
     string filepath = HttpContext.Current.Server.MapPath("~/Images/");
     string filefullname = filepath + FileUpload1.FileName;
     string filelujing = "\\Images\\" + FileUpload1.FileName;
     FileUpload1.SaveAs(filefullname);//获取图片物理地址D:\My Documents\Visual Studio 2013\WebSites\WebSite1\Images
     if (gName.Text.Trim() == "" || cname.Text.Trim() == "")
     {
         Response.Write("<script language='javascript'>alert('商品名称或联系人不能为空')</script>");
         return;
     }
     String str = "INSERT INTO [Goods] (goodsname,images,goodsprice,goodssort,connectpeople,phone,Username,details,datetime) VALUES ('" + gName.Text.Trim() + "','" + filelujing + "','" + gMoney.Text.Trim() + "','" + a + "','" + cname.Text.Trim() + "','" + phone.Text.Trim() + "','" + name + "','" + details.Text.Trim() + "','" + time + "')";
     SqlCommand cmd = data.excute(str);
     Response.Redirect("person.aspx");
 }

    protected void Button1_Click1(object sender, System.EventArgs e)
    {
        if (txtUser.Text.Trim() == "" || txtPwd.Text.Trim() == "")
        {
            lbInfo.Text = "请你务必填写必要的项!";
        }
        else if (txtPwd.Text.Trim() != txtPwdR.Text.Trim())
            lbInfo.Text = "两次密码不一致,请核实!";
        else
        {
            DataAccess data = new DataAccess();
            data.Connection();
            String str1 = "SELECT * FROM [User] where Username='" + txtUser.Text.Trim() + "'";
            SqlCommand comm = data.excute(str1);
            DataSet ds = new DataSet();
            SqlDataAdapter sda = new SqlDataAdapter(comm);
            sda.Fill(ds);
            if (ds.Tables[0].Rows.Count > 0)
            {
                lbInfo.Text = "你注册的用户名已经被别人注册,请改其它的名字注册";
            }
            else
            {

                try
                {
                    String str = "INSERT INTO [User] (Username,Uemail,Upassword) VALUES ('" + txtUser.Text.Trim() + "','" + txtMail.Text.Trim() + "','" + txtPwd.Text.Trim() + "')";
                    SqlCommand com = data.excute(str);
                }
                catch (Exception eb)
                {
                    eb.Message.Clone();
                }
                Response.Redirect("Default.aspx");

            }
        }
    }