Kendo UI 是一个基于 jQuery 的 UI 组件库,提供了丰富的 UI 控件,其中包括 Kendo jQuery 网格(Grid)。在 Kendo jQuery 网格中,下拉过滤器(Dropdown Filter)是一个常用的功能,允许用户通过下拉菜单来过滤网格中的数据。
Kendo jQuery 网格(Grid):一个高度可定制的数据表格控件,支持分页、排序、过滤、编辑等功能。
下拉过滤器(Dropdown Filter):一种过滤器类型,允许用户从一个下拉列表中选择一个值来过滤网格数据。
假设你已经有一个 Kendo jQuery 网格,并且其中包含一个下拉过滤器。以下是如何获取下拉过滤器上当前选中项的文本的示例代码:
<!DOCTYPE html>
<html>
<head>
<title>Kendo Grid Dropdown Filter Example</title>
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2023.1.117/styles/kendo.common.min.css">
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2023.1.117/styles/kendo.default.min.css">
<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2023.1.117/js/kendo.all.min.js"></script>
</head>
<body>
<div id="grid"></div>
<button id="getFilterText">Get Filter Text</button>
<script>
$(document).ready(function () {
$("#grid").kendoGrid({
dataSource: {
type: "odata",
transport: {
read: "https://demos.telerik.com/kendo-ui/service/Northwind.svc/Orders"
},
schema: {
model: {
fields: {
OrderID: { type: "number" },
Freight: { type: "number" },
ShipName: { type: "string" },
OrderDate: { type: "date" },
ShipCity: { type: "string" }
}
}
},
pageSize: 20
},
height: 550,
sortable: true,
pageable: true,
filterable: {
extra: false,
operators: {
string: {
contains: "Contains",
eq: "Is equal to",
neq: "Is not equal to",
startswith: "Starts with",
endswith: "Ends with"
},
number: {
eq: "Is equal to",
neq: "Is not equal to",
gte: "Is greater than or equal to",
gt: "Is greater than",
lte: "Is less than or equal to",
lt: "Is less than"
},
date: {
eq: "Is equal to",
neq: "Is not equal to",
gte: "Is after or equal to",
gt: "Is after",
lte: "Is before or equal to",
lt: "Is before"
}
}
},
columns: [
{ field: "OrderID", title: "Order ID", width: 120 },
{ field: "Freight", width: 120, filterable: { ui: "numericFilter" } },
{ field: "OrderDate", title: "Order Date", width: 140, format: "{0:MM/dd/yyyy}", filterable: { ui: "dateFilter" } },
{ field: "ShipName", title: "Ship Name", width: 260, filterable: { ui: "stringFilter" } },
{ field: "ShipCity", title: "Ship City", width: 150, filterable: { ui: "dropdownFilter" } }
]
});
$("#getFilterText").click(function () {
var grid = $("#grid").data("kendoGrid");
var filter = grid.dataSource.filter();
if (filter && filter.filters) {
filter.filters.forEach(function (f) {
if (f.field === "ShipCity") {
var dropdownFilter = grid.columns.find(col => col.field === "ShipCity").filterable.ui;
if (dropdownFilter && dropdownFilter.value()) {
alert("Selected Filter Text: " + dropdownFilter.value());
}
}
});
}
});
});
function stringFilter(e) {
e.kendoDropDownList({
dataSource: ["Berlin", "Hamburg", "London", "Madrid", "Paris", "Rome", "Seville", "Stockholm", "Vienna"],
optionLabel: "Select city..."
});
}
function numericFilter(e) {
e.kendoNumericTextBox({
spinners: false,
min: 0,
max: 1000
});
}
function dateFilter(e) {
e.kendoDatePicker({
format: "MM/dd/yyyy"
});
}
function dropdownFilter(e) {
e.kendoDropDownList({
dataSource: ["Berlin", "Hamburg", "London", "Madrid", "Paris", "Rome", "Seville", "Stockholm", "Vienna"],
optionLabel: "Select city..."
});
}
</script>
</body>
</html>
ShipCity
列的下拉过滤器,并获取其当前选中的文本。问题:无法获取下拉过滤器的选中文本。
原因:可能是由于下拉过滤器的初始化或事件绑定不正确。
解决方法:
ui
函数正确初始化了下拉列表。通过上述代码和解释,你应该能够理解如何在 Kendo jQuery 网格中获取下拉过滤器的选中文本,并解决相关问题。
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