GridView and DropDownList

 1    <form id="form1" runat="server">

 2     <div>

 3     <asp:GridView runat="server" ID="gv_KeyList" AutoGenerateColumns="False" 

 4             Width="99%" onrowdeleting="gv_KeyList_RowDeleting">

 5         <Columns>

 6             <asp:BoundField DataField="text" HeaderText="Friends" />

 7             <asp:TemplateField>

 8                

 9                 <ItemTemplate>

10                    <asp:DropDownList runat="server" ID="DropDownList1"  DataSource='<%#DDLBind() %>' DataTextField="text" DataValueField="id"> </asp:DropDownList>

11                 </ItemTemplate>

12             </asp:TemplateField>

13             <asp:CommandField ShowDeleteButton="True" />

14         </Columns>

15         </asp:GridView>

16     </div>

17     </form>

View Code

 if (!IsPostBack)

        {

            DropDownList dll;

            string strSql = "select * from emailreceive where p_id!=1 ";

            string conn = "server=.;database=emailfriends;uid=sa;pwd=123";

            SqlConnection conns = new SqlConnection(conn);

            conns.Open();

            SqlCommand cmd = new SqlCommand(strSql, conns);

            SqlDataAdapter sda = new SqlDataAdapter();

            sda.SelectCommand = cmd;

            DataSet ds = new DataSet();

            sda.Fill(ds, "a");

            gv_KeyList.DataSource = ds.Tables[0];

            gv_KeyList.DataBind();

         

            DataTable dt = DDLBind();

        

            for (int i = 0; i < gv_KeyList.Rows.Count;i++ )

            { 

                DataRowView mygv=ds.Tables[0].DefaultView[i];

               for(int j=0;j<dt.Rows.Count;j++)

               {

               

                   DataRowView pKeyName = dt.DefaultView[j];

                   if (Convert.ToInt32(mygv["p_id"]) == Convert.ToInt32(pKeyName["id"]))

                   {

                       dll = (DropDownList)gv_KeyList.Rows[i].FindControl("DropDownList1");

                       string id=mygv["p_id"].ToString();

                       dll.SelectedValue = id;

                      }

               }

              



            

            }     

                      

              

                conns.Close();

         

        }

    }



    public DataTable DDLBind()

    {

        string strSql1 = "select * from emailreceive where p_id=1 ";

        string conn1 = "server=.;database=emailfriends;uid=sa;pwd=123";

        SqlConnection conns1 = new SqlConnection(conn1);

        conns1.Open();

        SqlCommand cmd1 = new SqlCommand(strSql1, conns1);

        SqlDataAdapter sda1 = new SqlDataAdapter();

        sda1.SelectCommand = cmd1;

        DataSet ds1 = new DataSet();

        sda1.Fill(ds1, "a");

        conns1.Close();

        return ds1.Tables[0];

    

    }



    protected void gv_KeyList_RowDeleting(object sender, GridViewDeleteEventArgs e)

    {

        string ddlValues = ((DropDownList)gv_KeyList.Rows[e.RowIndex].Cells[1].FindControl("DropDownList1")).SelectedValue;

        Response.Write(ddlValues);

    }

}

三层的前台代码：

 1    <asp:GridView runat="server" ID="gv_KeyList" Width="99%" 

 2             AutoGenerateColumns="False" onrowdeleting="gv_KeyList_RowDeleting" 

 3             DataKeyNames="I_KeyId" onrowcancelingedit="gv_KeyList_RowCancelingEdit" 

 4             onrowediting="gv_KeyList_RowEditing" onrowupdating="gv_KeyList_RowUpdating">

 5         <Columns>

 6             <asp:BoundField DataField="Vc_KeyName" HeaderText="关键词" />

 7             <asp:TemplateField HeaderText="父关键词">

 8                

 9                 <ItemTemplate>

10                    <asp:DropDownList runat="server" ID="ddlPKey" DataSource='<%#ddlBind() %>' DataTextField="Vc_KeyName" DataValueField="I_KeyId"></asp:DropDownList>

11                 </ItemTemplate>

12             </asp:TemplateField>

13             <asp:BoundField DataField="Vc_Url" HeaderText="关键词连接" />

14             <asp:CommandField HeaderText="修改" ShowEditButton="True" />

15             <asp:CommandField HeaderText="删除" ShowDeleteButton="True" />

16         </Columns>

17         </asp:GridView>

View Code

三层UI层代码：

 1 chinaOfQiHuo.BLL.Guanjiancixinxi bllKey = new chinaOfQiHuo.BLL.Guanjiancixinxi();

 2 

 3         protected void Page_Load(object sender, EventArgs e)

 4         {

 5             if (!IsPostBack)

 6             {

 7                 DDL_PKey.DataTextField = "Vc_KeyName";

 8                 DDL_PKey.DataValueField = "I_KeyId";

 9                 DDL_PKey.DataSource = ddlBind();

10                 DDL_PKey.DataBind();

11                  gv_KeyList.DataSource = gvBind();

12                  gv_KeyList.DataBind();

13                 //绑定ddl

14                 DropDownList ddl;

15                 for (int i = 0; i < gv_KeyList.Rows.Count; i++)

16                 {

17                     for (int j = 0; j < ddlBind().Count; j++)

18                     {

19                         if (gvBind()[i].I_SuperId == ddlBind()[j].I_KeyId)

20                         {

21                             ddl = (DropDownList)gv_KeyList.Rows[i].FindControl("ddlPKey");

22                             ddl.SelectedValue = gvBind()[i].I_SuperId.ToString();

23                         }

24                     }

25                 }

26             }

27         }

28         public  List<chinaOfQiHuo.Model.Guanjiancixinxi> ddlBind()

29         {

30 

31             return bllKey.GetDDLPKey();

32         

33         }

34         public List<chinaOfQiHuo.Model.Guanjiancixinxi> gvBind()

35         {

36           return  bllKey.GetGVList();

37         

View Code

三层BLL层代码：

 1  chinaOfQiHuo.DAL.Guanjiancixinxi dalKey = new DAL.Guanjiancixinxi();

 2        public bool Add(chinaOfQiHuo.Model.Guanjiancixinxi model,out string Msg)

 3        {

 4            if (Exists(model.Vc_KeyName))//已存在关键词

 5            {

 6                Msg = "关键词已存在";

 7                return false;

 8            }

 9            else

10            {

11                int id = 0;

12 

13                id = dalKey.Add(model);

14                if (id > 0)

15                {

16                    Msg = "关键词添加成功";

17                    return true;

18                }

19                else {

20                    Msg = "添加超时，请重新添加";

21                    return false;

22                }

23            }

24        

25        }

26        public bool Exists(string keyName)

27        {

28            return dal.Exists(keyName);

29        }

30        public List<Model.Guanjiancixinxi> GetDDLPKey()

31        {

32            return dalKey.GetDDLPKey();

33        }

34        public List<Model.Guanjiancixinxi> GetGVList()

35        {

36        

37          return  dalKey.GetGVKeyList();

38        }

39      

40     }

View Code

三层DAL层代码：

 1  public bool Exists(string keyName)

 2        {

 3            StringBuilder strSql = new StringBuilder();

 4            strSql.Append("select count(1) from tb_Guanjiancixinxi");

 5            strSql.Append(" where Vc_KeyName = @keyName");

 6            SqlParameter[] parameters = {

 7                     new SqlParameter("@keyName", SqlDbType.VarChar,50)

 8             };

 9            parameters[0].Value = keyName;

10 

11            return DbHelperSQL.Exists(strSql.ToString(), parameters);

12        }

13        //绑定父关键字

14        public List<Model.Guanjiancixinxi> GetDDLPKey()

15        {

16            StringBuilder strSql = new StringBuilder();

17            strSql.Append("select * from tb_Guanjiancixinxi where I_SuperId=0 ");

18           

19            List<Model.Guanjiancixinxi> pKeylist = new List<Model.Guanjiancixinxi>();

20           SqlDataReader dr= SqlHelper.ExecuteReader(SqlHelper.SqlConnectionString,CommandType.Text,strSql.ToString(),null);

21           while (dr.Read())

22           {

23               Model.Guanjiancixinxi model = new Model.Guanjiancixinxi();

24               model.Vc_KeyName = dr["Vc_KeyName"].ToString();

25               model.I_KeyId = Convert.ToInt32(dr["I_KeyId"]);

26               pKeylist.Add(model);

27           }

28           return pKeylist;

29        }

30      //获取关键字列表

31        public List<Model.Guanjiancixinxi> GetGVKeyList()

32        {

33            string strSql = "select I_KeyId,I_SuperId,Vc_KeyName,Vc_Url FROM tb_Guanjiancixinxi where I_SuperId!=0";

34            SqlDataReader dr = SqlHelper.ExecuteReader(SqlHelper.SqlConnectionString,CommandType.Text,strSql,null);

35            List<Model.Guanjiancixinxi> gvList = new List<Model.Guanjiancixinxi>();

36            while (dr.Read())

37            {

38                Model.Guanjiancixinxi model = new Model.Guanjiancixinxi();

39                model.Vc_KeyName = dr["Vc_KeyName"].ToString();

40                model.PKeyName = GetPKeyName(Convert.ToInt32(dr["I_SuperId"]));

41                model.I_SuperId = Convert.ToInt32(dr["I_SuperId"]);

42                model.I_KeyId = Convert.ToInt16(dr["I_KeyId"]);

43                model.Vc_Url = dr["Vc_Url"].ToString();

44                gvList.Add(model);

45            }

46            return gvList;

47        }

48        private string GetPKeyName(int superId)

49        {

50            string strSql = "select Vc_KeyName from tb_Guanjiancixinxi where I_KeyId =@superId";

51            SqlParameter[] spt = new SqlParameter[] { new SqlParameter("@superId", SqlDbType.Int) { Value = superId } };

52            object obj = SqlHelper.ExecuteScalar(SqlHelper.SqlConnectionString, CommandType.Text, strSql,spt);

53            return obj.ToString();

54        }

55     }

View Code

GridView与DropDownList的混合使用