从下拉列表中获取值并将其添加到Gridview
我在asp.net中有两个从数据库生成的下拉列表。当用户从第一个下拉列表中选择一个值时，将根据该值生成第二个下拉列表。
我还有一个gridview，有一个添加行，删除和保存功能。在网格视图的每个单元格内是由添加行功能自行生成的文本框。
我想要做的是从下拉列表中添加一个添加选定值按钮，并将第二个下拉列表的值添加到gridview的第一个单元格中。
但是，如果生成了多个gridview行，则应该出现一个选项，询问应该将值插入哪一行。
我可以得到一些帮助吗？
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>
以下是背后的代码。该代码包含添加行，删除和保存功能。该代码还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
}
1 个答案:
答案 0 :(得分：0)
这是一个快速的＆amp;我根据你的要求制作的脏样品让你入门。
- 您可以选择汽车制造商和获得选定的模特
- 您可以点击按钮 向gridview添加行
- 您可以通过复选框点击gridview 选择股票模型的属性
.aspx的
<%@ 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>
代码隐藏
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;
}
}
}
}
}
}
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？