Question

我使用的是Asp .Net Web Forms。我有2个dropDown列表和1个输入字段。我希望当我更改dropDown列表中的项目或字段值来调用某个事件但它调用所有事件时。

例如，如果我更改大小，则调用Size_SelectedIndexChanged，然后调用Color_SelectedIndexChanged，然后调用txtKolicina_TextChanged 如果我更改颜色，则调用Color_SelectedIndexChanged，而不是Size_SelectedIndexChanged，然后调用txtKolicina_TextChanged。

任何帮助？

import pygame
from itertools import product, chain

pygame.init()
screen = pygame.display.set_mode((300, 300))
clock = pygame.time.Clock()
board = {(0,0),(1,0),(1,1),(0,1),(2,3),(2,2),(3,3),(3,2)}
pygame.time.set_timer(pygame.USEREVENT, 1500)

CELLSIZE = 32
H_CELLSIZE = CELLSIZE / 2

def neighbors(point):
    x,y = point
    for dx, dy in product((-1,0,1), repeat=2):
        if dx != 0 or dy != 0:
            if x + dx >= 0 and y + dy >= 0:
                yield x + dx, y + dy

def step(board):
    new_board = set()
    with_neighbors = board | set(chain(*map(neighbors, board)))
    for point in with_neighbors:
        count = sum((neigh in board) for neigh in neighbors(point))
        if count == 3 or (count == 2 and point in board):
            new_board.add(point)
    return new_board

def scr_to_board(pos):
    x, y = pos
    return (x / CELLSIZE , y / CELLSIZE)

def board_to_scr(pos):
    x, y = pos
    return (x * CELLSIZE + H_CELLSIZE, y * CELLSIZE + H_CELLSIZE)

while True:
    if pygame.event.get(pygame.QUIT): 
        break

    for e in pygame.event.get():
        if e.type == pygame.MOUSEBUTTONDOWN:
            board ^= {scr_to_board(pygame.mouse.get_pos())}
        if e.type == pygame.USEREVENT:
            board = step(board)

    screen.fill(pygame.color.Color('white'))
    for cell in board:
        pygame.draw.circle(screen, pygame.color.Color('black'), board_to_scr(cell), H_CELLSIZE, 0)

    pygame.display.flip()
    clock.tick(60)

这是backEnd

    <asp:DropDownList ID="Colors" runat="server" AutoPostBack="true" CssClass="form-control detal-page-input" Style="height: 30px;" OnSelectedIndexChanged="Colors_SelectedIndexChanged" AppendDataBoundItems="True" DataSourceID="LinqDataSource3" DataTextField="color" DataValueField="color" >
                                                <asp:ListItem Text="" Value=""></asp:ListItem>
                                            </asp:DropDownList>

<asp:DropDownList ID="Size" runat="server" OnSelectedIndexChanged="Size_SelectedIndexChanged" AppendDataBoundItems="true" AutoPostBack="true" CssClass="form-control detal-page-input" Style="height: 30px;" DataSourceID="LinqDataSource2" DataTextField="size" DataValueField="size" EnableViewState="true">
                                                <asp:ListItem Text="" Value=""></asp:ListItem>
                                            </asp:DropDownList>


     <asp:TextBox Name="txtKolicina" ID="txtKolicina" runat="server" CssClass="form-control form-numberone detal-page-input" OnTextChanged="txtKolicina_TextChanged" ></asp:TextBox>

更新

   protected void Size_SelectedIndexChanged(object sender, EventArgs e)
    {
//do something
}
    protected void Colors_SelectedIndexChanged(object sender, EventArgs e)
    {
//do something
}
 protected void txtKolicina_TextChanged(object sender, EventArgs e)
    {  
//do something
}

Answer 1

看起来您使用View State并在Postback上的代码中重新填充DropDownLists。你能展示OnInit和OnLoad吗？

或者只是尝试这段代码：

        WHERE (articles.statut = ?
        OR statut IS NULL)";

$sql .= " AND categories.nom LIKE ? ";

Answer 2

好的，我发现了什么问题。改变

的EnableViewState = “假”

到

  EnableViewState="true"

DropDownList的SelectedIndexChanged事件调用所有事件

2 个答案: