如何根据在gridview中选择另一个下拉列表来填充下拉列表

Question

我有一个带有自己的 sqlDataSource 的 gridview。在页脚行中，我有一个插入字段来创建一个新行。但是，该页脚行非常复杂，我正在尝试弄清楚如何使其工作。

我希望看到的是用户选择 OTypeName ddl。基于该选择，启用 OSpecies ddl 并根据 OTypeName ddl 填充值。对于 OSpecies 和 O Variety 也可以这样说。

然后，用户将自己的信息输入到 OAge、OYields、OPlantDate 和 OPlantFrom。

页脚行中的其余字段是标签，这些标签将根据最终的 OVariety 选择进行填充。

然后插入按钮将所有这些列添加到网格视图中。

我只需要根据另一个 ddl 选择来填充一个 ddl 以及如何根据 ddl 选择来填充标签。

这是我在 aspx 文件中的代码：

<%@ 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>

我不确定要在 aspx.cs 文件中添加什么，但这是我目前所掌握的关于“插入”按钮的内容：

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();
}

任何帮助将不胜感激！

Example of Orchard Gridview

Answer 1

只是给你一个想法，你应该在你的代码隐藏中处理这个（我注意到 AutoPostBack 属性设置为 true）..

假设 ddl1 值更改事件或类似事件：

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

基本上，当您的第一个下拉列表的值发生变化时，您只需过滤其他下拉列表的项目来源。

如果您愿意，您还可以使用 javascript 来执行完全相同的概念以避免回发。

给一个人一条鱼，你可以喂他一天；教一个人钓鱼和 你养他一辈子

Answer 2

这是我发现可行的解决方案：

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;
    }
}

}