我正在制作一个项目，其中我被困在ajax工具包组合框的选定索引更改事件中。我想要的是，当我在组合框（studentname）中选择学生名称时，我将使用任何按钮将数据库中的其他列的值输入到文本框中...我已经在c＃windows窗体中完成了但是无法完成它在asp.net中。 我的代码是`
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
namespace Final_Project
{
public partial class Teacher_Mangement_page : System.Web.UI.Page
{
SqlConnection con = new SqlConnection();
string teachername;
protected void Page_Load(object sender, EventArgs e)
{
con.ConnectionString = ConfigurationManager.ConnectionStrings["studentdatastring"].ConnectionString;
teachername = "teacher1";//Session["name"].ToString();
if (!IsPostBack)
{
cb();
MultiView1.ActiveViewIndex = 0;
}
}
private void cb()
{
ComboBox1.Items.Clear();
ComboBox2.Items.Clear();
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "select studentname,subject from academictable where teachername='"+teachername+"'";
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
ComboBox1.Items.Add(dr["studentname"].ToString());
ComboBox2.Items.Add(dr["subject"].ToString());
}
con.Close();
}
protected void ComboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "select * from academictable where studentname='" + ComboBox1.Text + "' and subject='"+ComboBox2.Text+"' ";
SqlDataReader rd = cmd.ExecuteReader();
while (rd.Read())
{
qt1.Text = rd["quiz1"].ToString();
qt2.Text = rd["quiz2"].ToString();
qt3.Text = rd["quiz3"].ToString();
qt4.Text = rd["quiz4"].ToString();
ast1.Text = rd["assignment1"].ToString();
ast2.Text = rd["assignment2"].ToString();
prot.Text = rd["project"].ToString();
mt.Text = rd["mid"].ToString();
ft.Text = rd["final"].ToString();
}
rd.Close();
con.Close();
}
string subject;
protected void Button3_Click(object sender, EventArgs e)
{
MultiView1.ActiveViewIndex = 1;
subject = ComboBox2.Text;
}
protected void Button5_Click(object sender, EventArgs e)
{
MultiView1.ActiveViewIndex = 0;
}
}
}`
我的html代码是`
<!DOCTYPE html>
<html>
<head runat="server">
<title>Bootstrap demo</title>
<link href="bootstrap/bootstrap.css" rel="stylesheet" type="text/css" />
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, intial-scale=1" />
<style type="text/css">
.style3
{
text-align: center;
}
.style5
{
width: 582px;
text-align: right;
}
.style6
{
text-align: center;
}
.style7
{
width: 468px;
text-align: right;
}
h1
{ color:Aqua;
font-style:italic;
font-family:Broadway;
}
h2
{ color:Highlight;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<center><h1>STUDENT PORTAL</h1></center>
<asp:MultiView ID="MultiView1" runat="server">
<asp:View ID="select_subject" runat="server">
<table class="w-100">
<tr>
<td class="style6" colspan="2">
<h2>SUBJECT SELECTION</h2></td>
</tr>
<tr>
<td class="style7">
<h4>Subject:</h4></td>
<td>
<ajaxToolkit:ComboBox ID="ComboBox2" runat="server"
AutoCompleteMode="SuggestAppend" Width="300px">
</ajaxToolkit:ComboBox>
</td>
</tr>
<tr>
<td class="style6" colspan="2">
<asp:Button ID="Button2" runat="server" Text="Show Attendance" Width="162px" />
<ajaxToolkit:RoundedCornersExtender ID="Button2_RoundedCornersExtender"
runat="server" BehaviorID="Button2_RoundedCornersExtender"
TargetControlID="Button2" />
<asp:Button ID="Button3" runat="server" Text="Show Academic Details"
Width="178px" onclick="Button3_Click" /><ajaxToolkit:RoundedCornersExtender ID="RoundedCornersExtender1"
runat="server" TargetControlID="Button3"/>
</td>
</tr>
</table>
</asp:View>
<asp:View ID="Academic_details" runat="server">
<table class="w-100">
<tr>
<td class="text-center" colspan="2">
<h2>ACADEMIC DETAILS</h2></td>
</tr>
<tr>
<td class="style5">
Student Name:</td>
<td>
<ajaxToolkit:ComboBox ID="ComboBox1" runat="server"
AutoCompleteMode="SuggestAppend"
Width="300px" AutoPostBack="True">
</ajaxToolkit:ComboBox>
</td>
</tr>
<tr>
<td class="style5">
Quiz 1 Marks:</td>
<td>
<asp:TextBox ID="qt1" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Quiz 2 Marks:</td>
<td>
<asp:TextBox ID="qt2" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Quiz 3 Marks:</td>
<td>
<asp:TextBox ID="qt3" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Quiz 4 Marks:</td>
<td>
<asp:TextBox ID="qt4" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Assignment 1 Marks:</td>
<td>
<asp:TextBox ID="ast1" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Assignment 2 Marks:</td>
<td>
<asp:TextBox ID="ast2" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Presentation/Project Marks:</td>
<td>
<asp:TextBox ID="prot" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Sessional Marks:</td>
<td>
<asp:TextBox ID="sest" runat="server" ReadOnly="True" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Mid-Term Marks:</td>
<td>
<asp:TextBox ID="mt" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
Final-Term Marks:</td>
<td>
<asp:TextBox ID="ft" runat="server" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style5">
<em style="font-weight: bold; font-style: normal; color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial;">
Grade Point Average</em><span
style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;"><span> </span>(</span><wbr
style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial;"><em
style="font-weight: bold; font-style: normal; color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial;">GPA</em><span
style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">)<span> :</span></span></wbr>
</td>
<td>
<asp:TextBox ID="gpat" runat="server" ReadOnly="True" Width="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style3" colspan="2">
<asp:Button ID="Button4" runat="server" Text="Button" Width="162px" />
<ajaxToolkit:RoundedCornersExtender ID="Button4_RoundedCornersExtender"
runat="server" BehaviorID="Button1_RoundedCornersExtender"
TargetControlID="Button4" />
<asp:Button ID="Button5" runat="server" Text="Back" Width="162px"
onclick="Button5_Click" />
<ajaxToolkit:RoundedCornersExtender ID="Button5_RoundedCornersExtender"
runat="server" BehaviorID="Button5_RoundedCornersExtender"
TargetControlID="Button5" />
</td>
</tr>
</table>
</asp:View>
</asp:MultiView>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
</form>
</body>
`