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борется с утра. Сценарий выглядит следующим образом: У меня есть веб-страницы ASP.NET, имеющийЗаполните GridView на основе DropDownList.SelectedValue и кнопки Нажмите
- два DropDownList
- две кнопки
- Один GridView хочет заполнить GridView на основе DropDownList выбранного значения здесь является .aspx код
<%@ Page Title="" Language="VB" MasterPageFile="~/Admin/ADMIN.master" AutoEventWireup="false" CodeFile="EditSTUdetail.aspx.vb" Inherits="Admin_EditSTUdetail" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
<style type="text/css">
.auto-style1
{
height: 42px;
}
</style>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<div align="center">
<fieldset>
<legend style="font-size: 16px;">SEARCH/EDIT/DELETE STUDENT RECORDS
</legend>
<div style="overflow: auto">
<div>
<asp:Label ID="lblMsg" runat="server" CssClass="lblresponse" />
<table style="margin: 3px auto 1px auto; height: 72px;">
<tr>
<td style="text-align: right;" class="auto-style2">Select Session/सत्र का चयन करें :
</td>
<td class="auto-style3">
<asp:DropDownList ID="ddlSession" runat="server" AppendDataBoundItems="True" Width="236px" Height="28px">
<asp:ListItem Text="--Select Session--" Value=""></asp:ListItem>
<asp:ListItem Text="" Value=""></asp:ListItem>
</asp:DropDownList>
</td>
<td>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="*" ControlToValidate="ddlSession" ForeColor="#990000"></asp:RequiredFieldValidator></td>
</tr>
<tr>
<td style="text-align: right;" class="auto-style1">Select Course /कक्षा का चयन करें :
</td>
<td>
<asp:DropDownList ID="ddlCourse" runat="server" AppendDataBoundItems="true" Width="236px" Height="28px">
<asp:ListItem Text="--Select Course--" Value=""></asp:ListItem>
<asp:ListItem Text="" Value=""></asp:ListItem>
</asp:DropDownList>
</td>
<td>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="*" ControlToValidate="ddlCourse" ForeColor="#990000"></asp:RequiredFieldValidator></td>
</tr>
<tr>
<td class="auto-style1"></td>
<td class="auto-style1">
<asp:Button ID="btnSearch" runat="server" Text="SEARCH" CssClass="button" OnClick="btnSearch_Click" Height="34px" Width="77px" /></td>
<td colspan="2" class="auto-style1">
<asp:Button ID="btnRefresh" runat="server" Text="REFRESH" CssClass="button" OnClick="btnRefresh_Click" Height="34px" Width="77px" /></td>
</tr>
</table>
</div>
</div>
<asp:GridView ID="GVdata" runat="server" Width="674px" CaptionAlign="Top"
AutoGenerateColumns="False" Height="100px" BackColor="White"
BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3"
CellSpacing="2" GridLines="Vertical"
EmptyDataText="There Are No Record Found" OnRowCancelingEdit="gvManageOrders_RowCancelingEdit"
OnRowDeleting="gvManageOrders_RowDeleting" OnRowEditing="gvManageOrders_RowEditing"
OnRowUpdating="gvManageOrders_RowUpdating">
<AlternatingRowStyle BackColor="#DCDCDC" />
<Columns>
<asp:TemplateField HeaderText="Sr. No." ItemStyle-Width="20">
<ItemTemplate>
<asp:Label ID="lblRowNumber" Text='<%# Container.DataItemIndex + 1 %>' runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField HeaderText="Edit/Remove" ShowDeleteButton="True"
ShowEditButton="True" DeleteText="Remove" />
<asp:TemplateField HeaderText="Student ID" Visible="True">
<ItemTemplate>
<asp:Label ID="studentID" runat="server" Text='<%# Bind("studentID")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Student Name" Visible="True">
<ItemTemplate>
<asp:Label ID="Sname" runat="server" Text='<%# Bind("Sname")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Father's Name" Visible="True">
<ItemTemplate>
<asp:Label ID="Fname" runat="server" Text='<%# Bind("Fname")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EmptyDataRowStyle BackColor="#eeeeee" BorderColor="Black"
BorderStyle="Solid" BorderWidth="1px" Font-Size="Large" ForeColor="#851010"
HorizontalAlign="Center" />
<FooterStyle BackColor="#CCCCCC" ForeColor="Black" />
<HeaderStyle BackColor="#851010" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#851010" ForeColor="Black" HorizontalAlign="Center" />
<RowStyle BackColor="#EEEEEE" ForeColor="Black" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#F1F1F1" />
<SortedAscendingHeaderStyle BackColor="#0000A9" />
<SortedDescendingCellStyle BackColor="#CAC9C9" />
<SortedDescendingHeaderStyle BackColor="#000065" />
</asp:GridView>
</fieldset>
</div>
</asp:Content>и вот мой VB код:
Imports System.Collections.Generic
Imports System.Configuration
Imports System.Data.SqlClient
Imports System.Globalization
Imports System.Linq
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Net.Mail
Imports System.Data
Imports System.ComponentModel
Imports System.Drawing
Imports System.Text
Imports System.Windows.Forms
Partial Public Class Admin_EditSTUdetail
Inherits System.Web.UI.Page
Private myds As DataSet
Protected Sub LoadSession()
Dim con As New SqlConnection(ConfigurationManager.ConnectionStrings("cmsDB").ConnectionString)
con.Open()
Dim com As New SqlCommand("select sessionID, session from tblcategories ORDER by session DESC", con)
Dim da As New SqlDataAdapter(com)
Dim ds As New DataSet()
da.Fill(ds)
ddlSession.DataTextField = ds.Tables(0).Columns("session").ToString()
' text field name of table dispalyed in dropdown
ddlSession.DataValueField = ds.Tables(0).Columns("sessionID").ToString()
' to retrive specific textfield name
ddlSession.DataSource = ds.Tables(0)
'assigning datasource to the dropdownlist
ddlSession.DataBind()
ddlSession.SelectedIndex = -1
'binding dropdownlist
End Sub
Protected Sub LoadCourse()
Dim con As New SqlConnection(ConfigurationManager.ConnectionStrings("cmsDB").ConnectionString)
con.Open()
Dim com As New SqlCommand("SELECT DISTINCT course AS mycolumn FROM " _
& " tblsubjects where course is not null and " _
& "not course = '' order by mycolumn", con)
Dim da As New SqlDataAdapter(com)
Dim ds As New DataSet()
da.Fill(ds)
ddlCourse.DataTextField = ds.Tables(0).Columns("mycolumn").ToString()
' text field name of table dispalyed in dropdown
ddlCourse.DataValueField = ds.Tables(0).Columns("mycolumn").ToString()
' to retrive specific textfield name
ddlCourse.DataSource = ds.Tables(0)
'assigning datasource to the dropdownlist
ddlCourse.DataBind()
ddlCourse.SelectedIndex = -1
'binding dropdownlist
End Sub
Protected Sub fillgrid()
Dim cn As New SqlConnection(ConfigurationManager.ConnectionStrings("cmsDB").ConnectionString)
Dim cmd As New SqlCommand("SELECT StudentID,session,course,Sname,Fname FROM [tblstudetail] WHERE " _
& " [session] = '" + ddlSession.SelectedValue.ToString() + "' AND " _
& " [course] = '" + ddlCourse.SelectedValue.ToString() + "'", cn)
cn.Open()
Dim da As New SqlDataAdapter(cmd)
myds = New DataSet()
da.Fill(myds)
GVdata.DataSource = myds
GVdata.DataBind()
End Sub
Private Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
LoadSession()
LoadCourse()
fillgrid()
End If
End Sub
Protected Sub gvManageOrders_RowCancelingEdit(sender As Object, e As GridViewCancelEditEventArgs)
Throw New NotImplementedException
End Sub
Protected Sub gvManageOrders_RowDeleting(sender As Object, e As GridViewDeleteEventArgs)
Throw New NotImplementedException
End Sub
Protected Sub gvManageOrders_RowEditing(sender As Object, e As GridViewEditEventArgs)
Throw New NotImplementedException
End Sub
Protected Sub gvManageOrders_RowUpdating(sender As Object, e As GridViewUpdateEventArgs)
Throw New NotImplementedException
End Sub
Protected Sub btnSearch_Click(sender As Object, e As EventArgs) Handles btnSearch.Click
If Not Page.IsPostBack Then
fillgrid()
End If
End Sub
Protected Sub btnRefresh_Click(sender As Object, e As EventArgs) Handles btnRefresh.Click
GVdata.DataSource = Nothing
End Sub
End Class
Но это не возвращает то, что я прошу. Пожалуйста, помогите мне это ....
где выкл. Изменить метод? –