Question

我试图从Angular控制器中获取HTML元素的值。

   <div ng-app="myApp" ng-controller="myControler">
<br />

<input id="Text1" type="text"  runat="server" value="aValue" /

我的控制器：

var myApp = angular.module('myApp', []);


myApp.controller("myControler", function ($scope, $document) {

    var name = angular.element($('#Text1')).val();
     console.log(name);

});

但名称返回＆＃34;未定义＆＃34; ...

请问，我做错了什么？

Answer 1

angular.element是jquery $的别名。

您可以像这样访问该元素：angular.element('#Text1').val();

ng-model是实现这一目标的有条理的方式。您可以使用ng-init

从ASP设置值

<input id="Text1" type="text"  runat="server" ng-model="inputVal" ng-init="inputVal='aVal'">

可以使用范围console.log($scope.inputVal);

从控制器访问

JSfiddle示例：http://jsfiddle.net/n1oppeu2/

Answer 2

为什么你需要使用angular元素来访问表单元素？

您可以通过将模型绑定到它来获取和设置值

像这样

import numpy as np
import pulp
from itertools import product
threshold = 200
model = pulp.LpProblem('selection', pulp.LpMaximize)
similarity = np.array([[1., 0.08333333, 0.1, 0., 0., 0.0625],
                       [0.08333333, 1., 0.33333333,
                           0., 0.11111111, 0.07692308],
                       [0.1, 0.33333333, 1., 0.2, 0., 0.09090909],
                       [0., 0., 0.2, 1., 0., 0.],
                       [0., 0.11111111, 0., 0., 1., 0.27272727],
                       [0.0625, 0.07692308, 0.09090909, 0., 0.27272727, 1.]])
ingredients = ['var_%d' % i for i in range(6)]

ingredient_pairs = ['var_{}_{}'.format(
    ingredients.index(var[0]), ingredients.index(var[1])) 
    for var in product(ingredients, ingredients) 
    if ingredients.index(var[0]) > ingredients.index(var[1])]  
# Flatten the similarity array
indices = np.triu_indices_from(similarity)
similarity = similarity[indices]

scores = np.random.randint(1, 3, size=len(ingredients))
costs = np.random.randint(20, 60, len(ingredients))
scores = dict(zip(ingredients, scores))
costs = dict(zip(ingredients, costs))
similarity = dict(zip(ingredient_pairs, similarity))
x = pulp.LpVariable.dict(
    'x_%s', ingredients, lowBound=0, upBound=1, cat=pulp.LpInteger)
y = pulp.LpVariable.dict(
    'y_%s', ingredient_pairs, lowBound=0, upBound=1, cat=pulp.LpInteger)
model += sum([scores[i] * x[i] for i in ingredients]) + sum([
    similarity[i] * y[i] for i in ingredient_pairs])
model += sum([costs[i] * x[i] for i in ingredients]) <= threshold
for pair in ingredient_pairs:
    indexes = pair.split('_')[1:]
    for index in indexes:
        # y_{ij} <= x_i and y_{ij} <= x_j Q
        model += y[pair] <= x['var_{}'.format(index)]
    # y_{ij} >= x_i + x_j - 1
    model += y[pair] >= sum(x['var_{}'.format(i)] for i in indexes) - 1
solver = pulp.solvers.PULP_CBC_CMD()
model.solve(solver)
model.writeLP('similarity.lp')
print 'Objective: {}'.format(pulp.value(model.objective))
for v in model.variables():
    if v.varValue > 10e-4:
        print v.name, v.varValue

控制器

<input id="Text1" type="text"  runat="server" ng-model="input.field1" />

Answer 3

使用角度元素选择器＃

<input id="Text1" type="text"  runat="server" value="aValue" />

console.log(angular.element('#Text1').val());

或

console.log(angular.element('#Text1')[0].value);

从Angularjs控制器的HTML输入元素中获取值

3 个答案: