[英]Get Value from dropdown list and add it to a Gridview
我在asp.net中有兩個從數據庫生成的下拉列表。 當用戶從第一個下拉列表中選擇一個值時，將基於該值生成第二個下拉列表。
我也有一個具有添加行，刪除和保存功能的gridview。 在gridview的每個單元格內是文本框，這些文本框由添加行功能自行生成。
我想要做的是從下拉列表中添加一個添加選定值按鈕，並將第二個下拉列表的值添加到gridview的第一個單元格中。
但是，如果生成了多個gridview行，則應出現一個選項，詢問應將值插入到哪一行。
請給我一些幫助嗎？
以下是ASP.net
<asp:Content ID="Content3" ContentPlaceHolderID="MainContent" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<div class="workout">
<div class="exerciseDD">
<fieldset class="exercise">
<legend>Exercise List</legend>
<div style="text-align: justify">
To begin choose the exercise number you wish to add an exercise too. Then use
the dropdown menu to select the exercise you wish to use in your workout.
Finally click add to insert the exercise into the workout.
<br />
<br />
<asp:Label ID="Label3" runat="server" CssClass="bold"
Text="Choose an exercise number:"></asp:Label>
<br />
<asp:DropDownList ID="ExerNo" runat="server">
<asp:ListItem Selected="True">1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem>5</asp:ListItem>
<asp:ListItem>6</asp:ListItem>
<asp:ListItem>7</asp:ListItem>
<asp:ListItem>8</asp:ListItem>
</asp:DropDownList>
<br />
<br />
<asp:Label ID="MuscleGDD" runat="server" CssClass="bold" Text="Muscle Group:"></asp:Label>
<br />
<asp:DropDownList ID="MuscleDD" runat="server" AutoPostBack="True"
Height="22px" onselectedindexchanged="MuscleDD_SelectedIndexChanged"
Width="100%">
</asp:DropDownList>
<br />
<br />
<asp:Label ID="Label4" runat="server" CssClass="bold" Text="Exercise Name:"></asp:Label>
<br />
<asp:DropDownList ID="ExerciseDD" runat="server" AutoPostBack="True"
Height="22px" onselectedindexchanged="ExerciseDD_SelectedIndexChanged"
Width="100%">
</asp:DropDownList>
<br />
<br />
<asp:Button ID="Add" runat="server" Text="Add Exercise" onclick="Add_Click" />
<br />
<asp:Label ID="Label5" runat="server" CssClass="bold"
Text="Exercise Description:"></asp:Label>
<br />
<asp:Label ID="Exerdes" runat="server"></asp:Label>
</div>
</fieldset>
</div>
<div class="createWO">
<fieldset class="create">
<legend>Create Workout</legend>
<asp:Label ID="LabelUserId" runat="server" Visible="True"></asp:Label>
<br />
<strong>Workout Name:</strong> <asp:TextBox ID="WorkName" runat="server"></asp:TextBox>
<div>
<asp:Label ID="CurrentDate" runat="server" />
<asp:gridview ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false" OnRowDeleting="grvWorkout_RowDeleting">
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="Row Number" />
<asp:BoundField DataField="Userid" HeaderText="User ID" Visible="false"/>
<asp:TemplateField HeaderText="Exercise Name">
<ItemTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Set">
<ItemTemplate>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Repetition">
<ItemTemplate>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Weight">
<ItemTemplate>
<asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>
</ItemTemplate>
<FooterStyle HorizontalAlign="Right" />
<FooterTemplate>
<asp:Button ID="ButtonAdd" runat="server" Text="Add New Row"
onclick="ButtonAdd_Click" />
</FooterTemplate>
</asp:TemplateField>
<asp:CommandField ShowDeleteButton="True" />
</Columns>
</asp:gridview>
<asp:Button ID="Button1" runat="server" Text="Save" onclick="Button1_Click" />
<br />
<br />
</div>
</div>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>
下面是背后的代碼。 該代碼包含添加行，刪除和保存功能。 該代碼還包含填充下拉列表的功能：
private void SetInitialRow()
{
//Sets the initial row of the gridview
}
private void AddNewRowToGrid()
{
//Adds a new row and placing any data back into the gridview
}
private void SetPreviousData()
{
//temp save of the dat
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
DataTable MuscleG = new DataTable();
using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["RegConnectionString"].ConnectionString))
{
SqlDataAdapter adapter = new SqlDataAdapter("SELECT [Muscle_id], [MuscleName] FROM [MuscleGroup]", con);
adapter.Fill(MuscleG);
MuscleDD.DataSource = MuscleG;
MuscleDD.DataTextField = "MuscleName";
MuscleDD.DataValueField = "Muscle_id";
MuscleDD.DataBind();
}
//MuscleDD.Items.Insert(0, new ListItem("Select Muscle Name", "0"));
}
if (!Page.IsPostBack)
{
SetInitialRow();
}
CurrentDate.Text = DateTime.Now.ToString("yyyy-MM-dd");
}
protected void MuscleDD_SelectedIndexChanged(object sender, EventArgs e)
{
int muscleid = Convert.ToInt32(MuscleDD.SelectedValue);
DataTable exercises = new DataTable();
using (SqlConnection con2 = new SqlConnection(ConfigurationManager.ConnectionStrings["RegConnectionString"].ConnectionString))
{
SqlDataAdapter adapter = new SqlDataAdapter("SELECT [Exercise_id], [ExerciseName] FROM [Exercise] WHERE [Muscle_id] = " + muscleid, con2);
adapter.Fill(exercises);
ExerciseDD.DataSource = exercises;
ExerciseDD.DataTextField = "ExerciseName";
ExerciseDD.DataValueField = "Exercise_id";
ExerciseDD.DataBind();
}
//ExerciseDD.Items.Insert(0, new ListItem("Select Exercise", "0"));
}
protected void ExerciseDD_SelectedIndexChanged(object sender, EventArgs e)
{
int exerciseid = Convert.ToInt32(ExerciseDD.SelectedValue);
using (SqlConnection con3 = new SqlConnection(ConfigurationManager.ConnectionStrings["RegConnectionString"].ConnectionString))
{
con3.Open();
string cmdStr = "SELECT [Exercise_id], [ExerDesc] FROM [ExerciseDescription] WHERE [Exercise_id] = '" + exerciseid +"'";
SqlCommand Des = new SqlCommand(cmdStr, con3);
SqlDataReader reader = Des.ExecuteReader();
reader.Read();
Exerdes.Text = reader["ExerDesc"].ToString();
}
}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
AddNewRowToGrid();
}
protected void Button1_Click(object sender, EventArgs e)
{
//Saves data in gridview to database
}
//A method that returns a string which calls the connection string from the web.config
private string GetConnectionString()
{
}
//A method that Inserts the records to the database
private void InsertRecords(StringCollection sc)
{
//Inserts the records into the database
}
protected void Gridview1_RowCreated(object sender, GridViewRowEventArgs e)
{
}
private void SetRowData()
{
//Set data in temp table
}
protected void grvWorkout_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
//Deletes the row
}
//This function relates to the button I wish to insert the value of the dropdown menu into the gridview.
protected void Add_Click(object sender, EventArgs e)
{
//Add dropdown value
}
這是我根據您的要求制作的快速且骯臟的示例，旨在幫助您入門。
Aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="gridTest.aspx.cs" Inherits="WebApplication1.Gridview" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
Make:
<asp:DropDownList ID="ddlMake" runat="server" AppendDataBoundItems="True" AutoPostBack="True"
OnSelectedIndexChanged="ddlMake_SelectedIndexChanged">
<asp:ListItem Text=" - Select -" Value=""></asp:ListItem>
</asp:DropDownList>
<br />
Model:
<asp:DropDownList ID="ddlModels" runat="server">
</asp:DropDownList>
<br />
<br />
<h2>
Accessories
<asp:Button ID="btnAddConsignment" runat="server" OnClick="btnAddConsignment_Click"
Text="Add Consignment" />
</h2>
<asp:GridView ID="gvItems" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:TemplateField HeaderText="Consignment No.">
<ItemTemplate>
<%# Container.DataItemIndex+1 %>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Color">
<itemtemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</itemtemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Tires">
<itemtemplate>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</itemtemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="NOS">
<itemtemplate>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
</itemtemplate>
</asp:TemplateField>
<asp:TemplateField>
<itemtemplate><asp:CheckBox ID="cbSameAsStock" runat="server" AutoPostBack="True"
oncheckedchanged="cbSameAsStock_CheckedChanged" Text="Same as stock?" /></itemtemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
代碼隱藏
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
namespace WebApplication1
{
public partial class Gridview : System.Web.UI.Page
{
public class Make
{
public int Id { get; set; }
public string Name { get; set; }
public List<Make> GetMake()
{
return new List<Make>()
{
new Make { Id = 1, Name = "Ford" },
new Make { Id = 2, Name = "BMW" },
new Make { Id = 3, Name = "Lamborghini" }
}.ToList();
}
}
public class Models
{
public int ModelId { get; set; }
public int MakeId { get; set; }
public string Name { get; set; }
public List<Models> GetModels()
{
return new List<Models>()
{
new Models { ModelId=1, MakeId=1, Name="Ford Truck 1"},
new Models { ModelId=2, MakeId=1, Name="Ford Truck 2"},
new Models { ModelId=3, MakeId=1, Name="Ford Truck 3"},
new Models { ModelId=4, MakeId=3, Name="Gollarado"},
new Models { ModelId=5, MakeId=3, Name="Murcillago"}
};
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
// Temporary data fetched through a list. In production you will fetch data from the database
Make make = new Make();
ddlMake.DataSource = make.GetMake();
ddlMake.DataTextField = "Name";
ddlMake.DataValueField = "Id";
ddlMake.DataBind();
if(ViewState["dt"]!=null)
{
DataTable dt = ViewState["dt"] as DataTable;
gvItems.DataSource = dt;
}
}
}
protected void ddlMake_SelectedIndexChanged(object sender, EventArgs e)
{
// Filter second dropdown list
Models model = new Models();
ddlModels.DataSource = model.GetModels().Where(s => s.MakeId == int.Parse(ddlMake.SelectedValue));
ddlModels.DataTextField = "Name";
ddlModels.DataValueField = "ModelId";
ddlModels.DataBind();
}
protected void btnAddConsignment_Click(object sender, EventArgs e)
{
// Bind gridview to temporary data & store inside viewstate
DataTable dt = null;
if (ViewState["dt"] == null)
{
dt = new DataTable();
dt.Columns.Add(new DataColumn("Id", typeof(int)));
dt.Columns.Add(new DataColumn("Color", typeof(string)));
dt.Columns.Add(new DataColumn("Tires", typeof(string)));
dt.Columns.Add(new DataColumn("NOS", typeof(string)));
dt.Columns["Id"].AutoIncrement = true;
dt.Columns["Id"].AutoIncrementSeed = 1;
}
else
dt = ViewState["dt"] as DataTable;
DataRow dr = dt.NewRow();
dt.Rows.Add(dr);
gvItems.DataSource = dt;
gvItems.DataBind();
ViewState["dt"] = dt;
}
protected void cbSameAsStock_CheckedChanged(object sender, EventArgs e)
{
// Get your checkbox from gridview's selected row
CheckBox cbTemp = sender as CheckBox;
if (cbTemp != null)
{
// If selected, append selected model name to textboxes
if (cbTemp.Checked)
{
var selectedModel = ddlModels.SelectedItem.Text; // your selected car model
GridViewRow gr = ((CheckBox) sender).NamingContainer as GridViewRow;
if (gr != null)
{
TextBox txt1 = gr.FindControl("TextBox1") as TextBox;
TextBox txt2 = gr.FindControl("TextBox2") as TextBox;
TextBox txt3 = gr.FindControl("TextBox3") as TextBox;
txt1.Text = "Same as stock "+ selectedModel;
txt2.Text = "Same as stock " + selectedModel;
txt3.Text = "Same as stock " + selectedModel;
}
}
}
}
}
}
如何將下拉列表與Gridview中其他下拉列表的值綁定
[英]How to Bind dropdown list from the value of other dropdown list in Gridview
從具有ID的下拉列表中選擇一個值，並顯示在gridview中選擇的ID
[英]Select a value from dropdown list with the ID and display the ID selected in gridview
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