Bir ızgara görünümünde başka bir açılır listenin seçimine bağlı olarak bir açılır liste nasıl doldurulur?

Question

Kendi sqlDataSource ile bir gridview var. Altbilgi satırında yeni bir satır oluşturmak için bir Ekle alanım var. Ancak, bu altbilgi satırı oldukça karmaşıktır ve nasıl çalışacağımı anlamaya çalışıyorum.

Ne olduğunu görmek istiyorum, bir kullanıcı OTypeName ddl seçer. Bu seçime bağlı olarak, OSpecies ddl etkinleştirildi ve OTypeName ddl'ye dayalı değerleri doldurur. Aynı OSK ve OVariety ile ilgili olarak söylenebilir. Daha sonra kullanıcı kendi bilgilerini OAge, OYields, OPlantDate ve OPlantFrom'a girer.

Altbilgi satırındaki diğer alanlar, son OVariety seçimine göre doldurulacak etiketlerdir.

Ekle düğmesi, tüm bu sütunları grid görünümüne ekler.

Sadece bir ddl'yi diğerinin ddl seçimine ve ddl seçimine dayalı bir etiketin nasıl doldurulacağına dayalı olarak doldurmak konusunda yardıma ihtiyacım var. Ben aspx.cs dosyasında koymak için emin değilim

<%@ Page Title="" Language="C#" MasterPageFile="~/Permaculture.Master" AutoEventWireup="true" CodeBehind="OrchardMainWebForm.aspx.cs" Inherits="PermacultureOrganizer.OrchardMainWebForm" %> 
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> 
</asp:Content> 
<asp:Content ID="Content2" ContentPlaceHolderID="Content" runat="server" > 
<asp:GridView ID="gvOrchardData" runat="server" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="OUserOrchardID" DataSourceID="dsOrchardDatabase" CellPadding="4" CellSpacing="4" ForeColor="#333333" GridLines="Vertical" AutoGenerateDeleteButton="True" AutoGenerateEditButton="True" ShowFooter="True" Font-Bold="False"> 
<AlternatingRowStyle BackColor="White" /> 
<Columns> 
<asp:TemplateField HeaderText="OUserOrchardID" InsertVisible="False" SortExpression="OUserOrchardID"> 
<EditItemTemplate> 
<asp:Label ID="Label1" runat="server" Text='<%# Eval("OUserOrchardID") %>'></asp:Label> 
</EditItemTemplate> 
<ItemTemplate> 
<asp:Label ID="Label1" runat="server" Text='<%# Bind("OUserOrchardID") %>'></asp:Label> 
</ItemTemplate> 
<FooterTemplate> 
<asp:LinkButton ID="lbInsert" 
runat="server" 
OnClick="lbInsert_Click" ForeColor="White">Insert</asp:LinkButton> 
</FooterTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OTypeName" SortExpression="OTypeName"> 
<EditItemTemplate> 
<asp:DropDownList ID="DropDownList1" 
runat="server" 
AutoPostBack="True" 
DataSourceID="dsTypeName" 
DataTextField="OrchardTypeName" 
DataValueField="OrchardTypeID" > 
</asp:DropDownList> 
<asp:SqlDataSource ID="dsTypeName" runat="server" ConnectionString="<%$ ConnectionStrings:DB_9DE518_PermacultureConnectionString %>" SelectCommand="SELECT * FROM [tblOrchardType]"></asp:SqlDataSource> 
</EditItemTemplate> 
<ItemTemplate> 
<asp:Label ID="Label2" runat="server" Text='<%# Bind("OTypeName") %>'></asp:Label> 
</ItemTemplate> 
<FooterTemplate> 
<asp:DropDownList ID="ddlTypeName" 
runat="server" 
AutoPostBack="True" 
DataSourceID="dsTypeName" 
DataTextField="OrchardTypeName" 
DataValueField="OrchardTypeID" 
> 
</asp:DropDownList> 
<asp:SqlDataSource ID="dsTypeName" runat="server" ConnectionString="<%$ ConnectionStrings:DB_9DE518_PermacultureConnectionString %>" SelectCommand="SELECT * FROM [tblOrchardType]"></asp:SqlDataSource> 
</FooterTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OSpecies" SortExpression="OSpecies"> 
<EditItemTemplate> 
<asp:DropDownList ID="DropDownList2" 
runat="server" 
SelectedValue='<%# Bind("OSpecies") %>' 
AutoPostBack="True" 
DataSourceID="dsSpecies" 
DataTextField="Species" 
DataValueField="OrchardTypeID"> 
<asp:ListItem>Select Species</asp:ListItem> 
</asp:DropDownList> 
<asp:SqlDataSource ID="dsSpecies" runat="server" ConnectionString="<%$ ConnectionStrings:DB_9DE518_PermacultureConnectionString %>" SelectCommand="SELECT [Species], [OrchardTypeID] FROM [tblOrchardItem]"></asp:SqlDataSource> 
</EditItemTemplate> 
<ItemTemplate> 
<asp:Label ID="Label3" runat="server" Text='<%# Bind("OSpecies") %>'></asp:Label> 
</ItemTemplate> 
<FooterTemplate> 
<asp:DropDownList ID="ddlSpecies" 
runat="server" 
AutoPostBack="True" 
DataSourceID="dsSpecies" 
DataTextField="Species" 
DataValueField="OrchardTypeID" 
> 
<asp:ListItem>Select Species</asp:ListItem> 
</asp:DropDownList> 
<asp:SqlDataSource ID="dsSpecies" runat="server" ConnectionString="<%$ ConnectionStrings:DB_9DE518_PermacultureConnectionString %>" SelectCommand="SELECT [Species], [OrchardTypeID] FROM [tblOrchardItem]"> 
</asp:SqlDataSource> 
</FooterTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OVariety" SortExpression="OVariety"> 
<EditItemTemplate> 
<asp:DropDownList ID="DropDownList3" 
runat="server" 
AutoPostBack="True" 
DataSourceID="dsVariety" 
DataTextField="Variety" 
DataValueField="OrchardTypeID"> 
</asp:DropDownList> 
<asp:SqlDataSource ID="dsVariety" runat="server" ConnectionString="<%$ ConnectionStrings:DB_9DE518_PermacultureConnectionString %>" SelectCommand="SELECT [Variety], [OrchardTypeID] FROM [tblOrchardItem]"></asp:SqlDataSource> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:DropDownList ID="ddlVariety" 
runat="server" 
AutoPostBack="True" 
DataSourceID="dsVariety" 
DataTextField="Variety" 
DataValueField="OrchardTypeID" 
> 
</asp:DropDownList> 
<asp:SqlDataSource ID="dsVariety" runat="server" ConnectionString="<%$ ConnectionStrings:DB_9DE518_PermacultureConnectionString %>" SelectCommand="SELECT [Variety], [OrchardTypeID] FROM [tblOrchardItem]"></asp:SqlDataSource> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label4" runat="server" Text='<%# Bind("OVariety") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OAge" SortExpression="OAge"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("OAge") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:TextBox ID="txtBxAge" runat="server"></asp:TextBox> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label5" runat="server" Text='<%# Bind("OAge") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OYields" SortExpression="OYields"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox5" runat="server" Text='<%# Bind("OYields") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:TextBox ID="txtBxYields" runat="server"></asp:TextBox> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label6" runat="server" Text='<%# Bind("OYields") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OPlantDate" SortExpression="OPlantDate"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox6" runat="server" Text='<%# Bind("OPlantDate") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:TextBox ID="txtBxPlantDate" runat="server"></asp:TextBox> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label7" runat="server" Text='<%# Bind("OPlantDate") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OPlantFrom" SortExpression="OPlantFrom"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox7" runat="server" Text='<%# Bind("OPlantFrom") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:TextBox ID="txtBxPlantFrom" runat="server"></asp:TextBox> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label8" runat="server" Text='<%# Bind("OPlantFrom") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OTreeSpacing" SortExpression="OTreeSpacing"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("OTreeSpacing") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:Label ID="lblTreeSpacing" runat="server"></asp:Label> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label9" runat="server" Text='<%# Bind("OTreeSpacing") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OFertilizingTimes" SortExpression="OFertilizingTimes"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("OFertilizingTimes") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:Label ID="lblFertilizingTimes" runat="server"></asp:Label> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label10" runat="server" Text='<%# Bind("OFertilizingTimes") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OWateringNeeds" SortExpression="OWateringNeeds"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("OWateringNeeds") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:Label ID="lblWateringNeeds" runat="server"></asp:Label> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label11" runat="server" Text='<%# Bind("OWateringNeeds") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OPollination" SortExpression="OPollination"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox8" runat="server" Text='<%# Bind("OPollination") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:Label ID="lblPollination" runat="server"></asp:Label> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label12" runat="server" Text='<%# Bind("OPollination") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OFertilizer" SortExpression="OFertilizer"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox9" runat="server" Text='<%# Bind("OFertilizer") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:Label ID="lblFertilizer" runat="server"></asp:Label> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label13" runat="server" Text='<%# Bind("OFertilizer") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="OPesticide" SortExpression="OPesticide"> 
<EditItemTemplate> 
<asp:TextBox ID="TextBox10" runat="server" Text='<%# Bind("OPesticide") %>'></asp:TextBox> 
</EditItemTemplate> 
<FooterTemplate> 
<asp:Label ID="lblPesticide" runat="server"></asp:Label> 
</FooterTemplate> 
<ItemTemplate> 
<asp:Label ID="Label14" runat="server" Text='<%# Bind("OPesticide") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
</Columns> 
<EditRowStyle BackColor="#7C6F57" /> 
<FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="Black" /> 
<HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" /> 
<PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" /> 
<RowStyle BackColor="#E3EAEB" /> 
<SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" /> 
<SortedAscendingCellStyle BackColor="#F8FAFA" /> 
<SortedAscendingHeaderStyle BackColor="#246B61" /> 
<SortedDescendingCellStyle BackColor="#D4DFE1" /> 
<SortedDescendingHeaderStyle BackColor="#15524A" /> 
</asp:GridView> 
<asp:SqlDataSource ID="dsOrchardDatabase" runat="server" 
ConnectionString="<%$ ConnectionStrings:DB_9DE518_PermacultureConnectionString %>" 
SelectCommand="SELECT * FROM [tblUserOrchard]" DeleteCommand="DELETE FROM [tblUserOrchard] WHERE [OUserOrchardID] = @OUserOrchardID" InsertCommand="INSERT INTO [tblUserOrchard] ([OTypeName], [OSpecies], [OVariety], [OAge], [OYields], [OPlantDate], [OPlantFrom], [OTreeSpacing], [OFertilizingTimes], [OPruningTimes], [OWateringNeeds], [OPollination], [OFertilizer], [OPesticide]) VALUES (@OTypeName, @OSpecies, @OVariety, @OAge, @OYields, @OPlantDate, @OPlantFrom, @OTreeSpacing, @OFertilizingTimes, @OPruningTimes, @OWateringNeeds, @OPollination, @OFertilizer, @OPesticide)" UpdateCommand="UPDATE [tblUserOrchard] SET [OTypeName] = @OTypeName, [OSpecies] = @OSpecies, [OVariety] = @OVariety, [OAge] = @OAge, [OYields] = @OYields, [OPlantDate] = @OPlantDate, [OPlantFrom] = @OPlantFrom, [OTreeSpacing] = @OTreeSpacing, [OFertilizingTimes] = @OFertilizingTimes, [OPruningTimes] = @OPruningTimes, [OWateringNeeds] = @OWateringNeeds, [OPollination] = @OPollination, [OFertilizer] = @OFertilizer, [OPesticide] = @OPesticide WHERE [OUserOrchardID] = @OUserOrchardID"> 
<DeleteParameters> 
<asp:Parameter Name="OUserOrchardID" Type="Int32" /> 
</DeleteParameters> 
<InsertParameters> 
<asp:Parameter Name="OTypeName" Type="String" /> 
<asp:Parameter Name="OSpecies" Type="String" /> 
<asp:Parameter Name="OVariety" Type="String" /> 
<asp:Parameter Name="OAge" Type="Int32" /> 
<asp:Parameter Name="OYields" Type="String" /> 
<asp:Parameter Name="OPlantDate" Type="String" /> 
<asp:Parameter Name="OPlantFrom" Type="String" /> 
<asp:Parameter Name="OTreeSpacing" Type="String" /> 
<asp:Parameter Name="OFertilizingTimes" Type="String" /> 
<asp:Parameter Name="OPruningTimes" Type="String" /> 
<asp:Parameter Name="OWateringNeeds" Type="String" /> 
<asp:Parameter Name="OPollination" Type="String" /> 
<asp:Parameter Name="OFertilizer" Type="String" /> 
<asp:Parameter Name="OPesticide" Type="String" /> 
</InsertParameters> 
<UpdateParameters> 
<asp:Parameter Name="OTypeName" Type="String" /> 
<asp:Parameter Name="OSpecies" Type="String" /> 
<asp:Parameter Name="OVariety" Type="String" /> 
<asp:Parameter Name="OAge" Type="Int32" /> 
<asp:Parameter Name="OYields" Type="String" /> 
<asp:Parameter Name="OPlantDate" Type="String" /> 
<asp:Parameter Name="OPlantFrom" Type="String" /> 
<asp:Parameter Name="OTreeSpacing" Type="String" /> 
<asp:Parameter Name="OFertilizingTimes" Type="String" /> 
<asp:Parameter Name="OPruningTimes" Type="String" /> 
<asp:Parameter Name="OWateringNeeds" Type="String" /> 
<asp:Parameter Name="OPollination" Type="String" /> 
<asp:Parameter Name="OFertilizer" Type="String" /> 
<asp:Parameter Name="OPesticide" Type="String" /> 
<asp:Parameter Name="OUserOrchardID" Type="Int32" /> 
</UpdateParameters> 
</asp:SqlDataSource> 
<asp:SqlDataSource ID="dsTypeName" runat="server" ConnectionString="<%$ ConnectionStrings:DB_9DE518_PermacultureConnectionString %>" SelectCommand="SELECT * FROM [tblOrchardType]"></asp:SqlDataSource> 
</asp:Content> 

ama burada bugüne kadar Ekle düğmesini ilgili ne var:

İşte aspx dosyasındaki kodum var

public void lbInsert_Click(object sender, EventArgs e) 
{ 
dsOrchardDatabase.InsertParameters["OTypeName"].DefaultValue = 
((DropDownList)gvOrchardData.FooterRow.FindControl("ddlTypeName")).SelectedItem.ToString(); 
dsOrchardDatabase.InsertParameters["OSpecies"].DefaultValue = 
((DropDownList)gvOrchardData.FooterRow.FindControl("ddlSpecies")).SelectedItem.ToString(); 
dsOrchardDatabase.InsertParameters["OVariety"].DefaultValue = 
((DropDownList)gvOrchardData.FooterRow.FindControl("ddlVariety")).SelectedItem.ToString(); 
dsOrchardDatabase.InsertParameters["OAge"].DefaultValue = 
((TextBox)gvOrchardData.FooterRow.FindControl("txtBxAge")).Text; 
dsOrchardDatabase.InsertParameters["OYields"].DefaultValue = 
((TextBox)gvOrchardData.FooterRow.FindControl("txtBxYields")).Text; 
dsOrchardDatabase.InsertParameters["OPlantDate"].DefaultValue = 
((TextBox)gvOrchardData.FooterRow.FindControl("txtBxPlantDate")).Text; 
dsOrchardDatabase.InsertParameters["OPlantFrom"].DefaultValue = 
((TextBox)gvOrchardData.FooterRow.FindControl("txtBxPlantFrom")).Text; 
dsOrchardDatabase.InsertParameters["OTreeSpacing"].DefaultValue = 
((Label)gvOrchardData.FooterRow.FindControl("lblTreeSpacing")).Text; 
dsOrchardDatabase.InsertParameters["OFertilizingTimes"].DefaultValue = 
((Label)gvOrchardData.FooterRow.FindControl("lblFertilizingTimes")).Text; 
dsOrchardDatabase.InsertParameters["OWateringNeeds"].DefaultValue = 
((Label)gvOrchardData.FooterRow.FindControl("lblWateringNeeds")).Text; 
dsOrchardDatabase.InsertParameters["OPollination"].DefaultValue = 
((Label)gvOrchardData.FooterRow.FindControl("lblPollination")).Text; 
dsOrchardDatabase.InsertParameters["OFertilizer"].DefaultValue = 
((Label)gvOrchardData.FooterRow.FindControl("lblFertilizer")).Text; 
dsOrchardDatabase.InsertParameters["OPesticide"].DefaultValue = 
((Label)gvOrchardData.FooterRow.FindControl("lblPesticide")).Text; 
dsOrchardDatabase.Insert(); 
} 

Herhangi bir yardım çok takdir!

Example of Orchard Gridview

Answer 1

Sadece bir fikir vermek için, size kod arkasında (I AutoPostBack özelliği true olarak ayarlandığı fark) bu işlemesi gereken ..

en ddl1 değeri değişikliği etkinliğinde diyelim veya benzer:

var ddl1Value = ddl1.SelectedValue; 
ddl2.ItemSource = ddl2DS.Where(item => item.Field1 = ddl1Value); 
ddl3.ItemSource = ddl3DS.Where(item => item.Field1 = ddl1Value); 

Temelde sadece değişiklikleri aşağı ilk damlasının değeri olarak listelere aşağı diğer damlasının madde kaynağını filtreler.

İsterseniz, geri bildirimleri önlemek için bu aynı işlemi gerçekleştirmek için javascript'i de kullanabilirsiniz.

Birine bir balık ver ve bir gün için onu beslemek; Bir ömür boyu İşte

Answer 2

için onu beslemek İşe buldum çözümü olan bir adam balık öğretmek ve:

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Data; 
using System.Data.SqlClient; 
using System.Configuration; 
using System.Web.Configuration; 

namespace PermacultureOrganizer 
{ 
    public partial class OrchardMainWebForm : System.Web.UI.Page 
    { 
     //Make the SQL connections 
     SqlConnection con2 = new SqlConnection(@"Data Source=SQL5018.SmarterASP.net;Initial Catalog=DB_9DE518_Permaculture;Persist Security Info=True;User ID=DB_9DE518_Permaculture_admin;Password=*****"); 
     public string con = WebConfigurationManager.ConnectionStrings["PermaCultureConnection"].ConnectionString; 

    public void Page_Load(object sender, EventArgs e) 
    { 
     if (!IsPostBack) 
     { 
      //Create EventHandlers 
      LinkButton btnInsert = new LinkButton(); 
      btnInsert.Click += new EventHandler(btnInsert_Click); 

      DropDownList ddlTypeName = new DropDownList(); 
      ddlTypeName.SelectedIndexChanged += new EventHandler(ddlTypeName_SelectedIndexChanged); 

      DropDownList ddlSpecies = new DropDownList(); 
      ddlSpecies.SelectedIndexChanged += new EventHandler(ddlSpecies_SelectedIndexChanged); 

      DropDownList ddlVariety = new DropDownList(); 
      ddlVariety.SelectedIndexChanged += new EventHandler(ddlVariety_SelectedIndexChanged); 
     } 
    } 

    protected void btnViewData_Click(object sender, EventArgs e) 
    { 
     //Go to OrchardViewer Page 
     Response.Redirect("OrchardViewer.aspx"); 
    } 

    protected void btnSearchData_Click(object sender, EventArgs e) 
    { 
     //Go to OrchardSearch Page 
     Response.Redirect("OrchardSearch.aspx"); 
    } 

    protected void ddlTypeName_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     //Populate ddlSpecies based on TypeName selection 
     ddlSpecies.DataSource = RetrieveSpecies(ddlTypeName.SelectedValue); 
     ddlSpecies.DataBind(); 
     ddlSpecies.Items.Insert(0, "Select Species"); 
    } 

    private DataTable RetrieveSpecies(string OrchardTypeID) 
    { 
     //Use OrchardTypeID from TypeName selection to filter Species 
     string connString = ConfigurationManager.ConnectionStrings["PermaCultureConnection"].ConnectionString; 
     string sql = @"SELECT OrchardItemID, OSpecies FROM tblOrchardItem WHERE OrchardTypeID = " + OrchardTypeID; 
     DataTable dtSpecies = new DataTable(); 

     using (SqlConnection conn = new SqlConnection(connString)) 
     { 
      conn.Open(); 
      //Initialize command object 
      using (SqlCommand cmd = new SqlCommand(sql, conn)) 
      { 
       SqlDataAdapter adapter = new SqlDataAdapter(cmd); 
       //Fill the result set 
       adapter.Fill(dtSpecies); 
      } 
     } 
     return dtSpecies; 
    } 

    protected void ddlSpecies_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     //Populate ddlVariety based on Species selection 
     ddlVariety.DataSource = RetrieveVariety(ddlSpecies.SelectedValue); 
     ddlVariety.DataBind(); 
     ddlVariety.Items.Insert(0, "Select Variety"); 
    } 

    private DataTable RetrieveVariety(string OrchardItemID) 
    { 
     //Use OrchardTypeID from Species selection to filter Variety 
     string connString = ConfigurationManager.ConnectionStrings["PermaCultureConnection"].ConnectionString; 
     string sql = @"SELECT OrchardItemID, OVariety FROM tblOrchardItem WHERE OrchardItemID = " + OrchardItemID; 
     DataTable dtVariety = new DataTable(); 

     using (SqlConnection conn = new SqlConnection(connString)) 
     { 
      conn.Open(); 
      //Initialize command object 
      using (SqlCommand cmd = new SqlCommand(sql, conn)) 
      { 
       SqlDataAdapter adapter = new SqlDataAdapter(cmd); 
       //Fill the result set 
       adapter.Fill(dtVariety); 
      } 
     } 
     return dtVariety; 
    } 

    protected void ddlVariety_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     //Gather additional data based on Variety selection 
     int OrchardItemID = Convert.ToInt32(ddlVariety.SelectedIndex); 
     BindOrchardGrid(OrchardItemID); 

     //Display picture next based on Variety selection 
     string Variety = ddlVariety.SelectedItem.ToString(); 
     switch (Variety) 
     { 
      case "Bladen": 
       imageTree.ImageUrl = "Images/blueberry-vine 300x200.jpg"; 
       break; 
      case "Bartlett": 
       imageTree.ImageUrl = "Images/Pear-Tree 300x200.jpg"; 
       break; 
      case "Babcook": 
       imageTree.ImageUrl = "Images/peach-tree-w-fruit 300x200.jpg"; 
       break; 
      case "Abbuoto": 
       imageTree.ImageUrl = "Images/grape-vine 300x200.jpg"; 
       break; 
      case "Carya": 
       imageTree.ImageUrl = "Images/pecans 300x200.jpg"; 
       break; 
     } 
    } 

    private void BindOrchardGrid(int OrchardItemID) 
    { 
     DataSet dtLabels; 
     SqlDataAdapter sda = new SqlDataAdapter(); 
     SqlCommand cmd = new SqlCommand("SELECT * FROM tblOrchardItem WHERE OrchardItemID = " + OrchardItemID, con2); 
     sda.SelectCommand = cmd; 
     dtLabels = new DataSet("OrchardItem"); 
     sda.Fill(dtLabels, "OrchardItem"); 

     foreach (DataRow row in dtLabels.Tables["OrchardItem"].Rows) 
     { 
      //Gather other pertinent data based on Variety selected 
      lblTreeSpacing.Text = Convert.ToString(row["OTreeSpacing"]); 
      lblFertilizingTimes.Text = Convert.ToString(row["OFertilizingTimes"]); 
      lblPruningTimes.Text = Convert.ToString(row["OPruningTimes"]); 
      lblWateringNeeds.Text = Convert.ToString(row["OWateringNeeds"]); 
      lblPollination.Text = Convert.ToString(row["OPollination"]); 

      int FertilizerID = Convert.ToInt32(row["FertilizerID"]); 
      int PesticideID = Convert.ToInt32(row["PesticideID"]); 

      DataSet dtFert; 
      SqlDataAdapter sdaF = new SqlDataAdapter(); 
      SqlCommand cmdF = new SqlCommand("SELECT * FROM tblFertilizer WHERE FertilizerID = " + FertilizerID, con2); 
      sdaF.SelectCommand = cmdF; 
      dtFert = new DataSet("Fert"); 
      sdaF.Fill(dtFert, "Fert"); 

      foreach (DataRow rowF in dtFert.Tables["Fert"].Rows) 
      { 
       lblFertilizer.Text = Convert.ToString(rowF["FertilizerName"]); 
      } 

      DataSet dtPest; 
      SqlDataAdapter sdaP = new SqlDataAdapter(); 
      SqlCommand cmdP = new SqlCommand("SELECT * FROM tblPesticide WHERE PesticideID = " + PesticideID, con2); 
      sdaP.SelectCommand = cmdP; 
      dtPest = new DataSet("Pest"); 
      sdaP.Fill(dtPest, "Pest"); 

      foreach (DataRow rowP in dtPest.Tables["Pest"].Rows) 
      { 
       lblPesticide.Text = Convert.ToString(rowP["PesticideName"]); 
      } 
     } 
    } 

    public void btnInsert_Click(object sender, EventArgs e) 
    { 
     //After the user inputs data, insert it into the database and then switch to OrchardViewer page 
     CreateOrchard(con); 
     Response.Redirect("OrchardViewer.aspx"); 
    } 

    public DataTable CreateOrchard(string con) 
    { 
     DataTable dtOrchard = new DataTable(); 
     using (SqlConnection Connection = new SqlConnection(con)) 
     { 
      SqlCommand sqlcmd = new SqlCommand(); 
      //associate command object with connection 
      sqlcmd.Connection = Connection; 
      sqlcmd.CommandType = CommandType.StoredProcedure; 
      sqlcmd.CommandText = "spInsertOrchardData"; 

      //Gather user input for insert into database 
      sqlcmd.Parameters.Add("@UserOrchardID", SqlDbType.VarChar, 1000).Value = ""; 
      sqlcmd.Parameters.Add("@TypeName", SqlDbType.VarChar, 1000).Value = Convert.ToString(ddlTypeName.SelectedItem); 
      sqlcmd.Parameters.Add("@Species", SqlDbType.VarChar, 1000).Value = Convert.ToString(ddlSpecies.SelectedItem); 
      sqlcmd.Parameters.Add("@Variety", SqlDbType.VarChar, 1000).Value = Convert.ToString(ddlVariety.SelectedItem); 
      sqlcmd.Parameters.Add("@Age", SqlDbType.Int, 1000).Value = Convert.ToInt32(txtBxAge.Text); 
      sqlcmd.Parameters.Add("@Yields", SqlDbType.VarChar, 1000).Value = Convert.ToInt32(txtBxYields.Text); 
      sqlcmd.Parameters.Add("@PlantDate", SqlDbType.VarChar, 1000).Value = Convert.ToString(txtBxPlantDate.Text); 
      sqlcmd.Parameters.Add("@PlantFrom", SqlDbType.VarChar, 1000).Value = Convert.ToString(txtBxPlantFrom.Text); 
      sqlcmd.Parameters.Add("@TreeSpacing", SqlDbType.VarChar, 1000).Value = Convert.ToString(lblTreeSpacing.Text); 
      sqlcmd.Parameters.Add("@FertilizingTimes", SqlDbType.VarChar, 1000).Value = Convert.ToString(lblFertilizingTimes.Text); 
      sqlcmd.Parameters.Add("@PruningTimes", SqlDbType.VarChar, 1000).Value = Convert.ToString(lblPruningTimes.Text); 
      sqlcmd.Parameters.Add("@WateringNeeds", SqlDbType.VarChar, 1000).Value = Convert.ToString(lblWateringNeeds.Text); 
      sqlcmd.Parameters.Add("@Pollination", SqlDbType.VarChar, 1000).Value = Convert.ToString(lblPollination.Text); 
      sqlcmd.Parameters.Add("@Fertilizer", SqlDbType.VarChar, 1000).Value = Convert.ToString(lblFertilizer.Text); 
      sqlcmd.Parameters.Add("@Pesticide", SqlDbType.VarChar, 1000).Value = Convert.ToString(lblPesticide.Text); 

      using (SqlDataAdapter sda = new SqlDataAdapter(sqlcmd)) 
      { 
       DataSet dataset = new DataSet(); 
       sda.Fill(dataset); 
      } 
     } 
     return dtOrchard; 
    } 
} 

} metnin