datatable <a>标签url跳转

博客介绍了从JS开始实现table表格回显,在return处添加a标签并写onclick事件,通过rowIndex返回table某一行位置,给出跳转链接格式,还说明了链接对应Spring Boot中controller主类和方法的@RequestMapping,实现表格跳转功能。

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先从js开始:
此处为table表格回显,在return处添加a标签,写一个onclick事件
(userInfo是js的一个方法)

// dataTables回显
var   columns = [
    {"data": "id","visible" : false},
    {
        "data": "username",
        render : function(data, type, row, meta){
            if (data) {
                return' <a onclick="userInfo(\'' + meta.row + '\')">'+data+'</a>';
            } else {
                return "——";
            }
        }
    }
]    

rowIndex表示返回table某一行的位置

function userInfo(rowIndex) {
var rowData = $('#controllLogTable').DataTable().rows().data()[rowIndex];
//查询出controllLogTable中所有字段的值
window.location.href="/userInfo/userList?id="+rowData.uid;
}

“/userInfo/userList?id=”+rowData.uid;
/userInfo对应要跳转到页面的controller主类中的@RequestMapping("/userInfo")
/userList对应controller类中方法的@RequestMapping("/userList")

@RequestMapping("/userList")
public ModelAndView userInfo(@Param("id")Long id){
    ModelAndView mv = new ModelAndView();
    mv.addObject("id",id);
    mv.setViewName("userInfo");
    return mv;
}

不懂可以问哦

<script setup lang="tsx"> import { DataTableSortState, NButton, NTag, SelectOption } from "naive-ui"; import { fetchGetChangeLedgerList, fetchBatchDeleteChange, fetchDeleteChange, } from "@/service/api"; import { generateZtUri } from "@/plugins"; import { $t } from "@/locales"; import { useAppStore } from "@/store/modules/app"; import { useTable, useTableOperate } from "@/hooks/common/table"; import { useAuth } from "@/hooks/business/auth"; import LedgerSearch from "./modules/ledger-search.vue"; import { useBoolean } from "@sa/hooks"; import { canUpgradeRecord } from "@/constants/business"; import { ref, onMounted, watch, h, computed } from "vue"; // import {useDepartment} from "@/hooks/common/useDepartment" // 导入嵌入模态框 import { getFullDeptOptions } from "@/service/api/"; // 导入完整部门选项服务 import { renderTooltip2, smartTextSplit } from "@/utils/other"; // 存储完整部门选项 const fullDeptOptions = ref<SelectOption[]>([]); // 加载完整部门列表 onMounted(async () => { fullDeptOptions.value = await getFullDeptOptions(); }); const deptRecord = computed(() => { const record: Record<string, string> = {}; fullDeptOptions.value.forEach(option => { record[option.value as string] = option.label as string; }); return record; }); const appStore = useAppStore(); const { columns, columnChecks, data, getData, loading, mobilePagination, searchParams, resetSearchParams, } = useTable({ apiFn: fetchGetChangeLedgerList, showTotal: true, apiParams: { current: 1, size: 10, // if you want to use the searchParams in Form, you need to define the following properties, and the value is null // the value can not be undefined, otherwise the property in Form will not be reactive source: null, pecoName: null, peco: null, softwareChange: null, projectno: null, dept: null, canUpgrade: null, softResponsiblePerson: null, elecResponsiblePerson: null, changeResponsiblePerson: null, customerDemandTime: null, softCompletionTime: null, hardCompletionTime: null, fmtCustomerDemandTime: null, fmtSoftCompletionTime: null, fmtHardCompletionTime: null, orderList: [], }, columns: () => [ { type: "selection", align: "center", width: 48, }, { key: "index", title: $t("common.index"), align: "center", width: 64, sorter: false, }, { key: "hwswcoId", title: $t("page.change.ledger.hwswcoId"), align: "left", minWidth: 60, width: 60, maxWidth: 200, sorter: true, fixed: "left", resizable: true, render: (row) => { const contents: any[] = []; contents.push( `未填写${$t("page.change.ledger.hwswcoId")}, 无法跳转禅道`, ); if (row.hwswcoId !== null) { return h( NButton, { strong: true, secondary: true, size: "small", type: "info", onClick: () => { const href = generateZtUri(`${row?.hwswco_url}`); window.open(href, "_blank"); }, }, { default: () => row.hwswcoId, }, ); } else { return <NTag>{row.hwswcoId}</NTag>; } }, }, { key: "source", title: $t("page.change.ledger.source"), align: "center", width: 80, sorter: true, resizable: true, }, { key: "pecoName", title: $t("page.change.ledger.pecoName"), align: "center", minWidth: 50, width: 100, maxWidth: 200, sorter: true, resizable: true, render: (row) => { const contents: any[] = smartTextSplit(row.pecoName, 50); return row.pecoName ? renderTooltip2(row.pecoName.slice(0, 10), contents) : null; }, }, { key: "peco", title: $t("page.change.ledger.peco"), align: "center", minWidth: 50, width: 100, maxWidth: 200, sorter: true, resizable: true, }, { key: "softwareChange", title: $t("page.change.ledger.softwareChange"), align: "center", minWidth: 50, width: 100, maxWidth: 200, sorter: true, resizable: true, }, { key: "projectno", title: $t("page.change.ledger.projectno"), align: "center", minWidth: 40, width: 80, maxWidth: 100, sorter: true, resizable: true, }, { key: "dept", title: $t("page.change.ledger.dept"), align: "center", width: 130, sorter: true, typeRecord: deptRecord, // 添加映射对象 render: (row) => { // 使用完整部门选项映射部门名称 if (row.dept && fullDeptOptions.value.length > 0) { const dept = fullDeptOptions.value.find( (option) => option.value === row.dept, ); if (dept) { return <span>{dept.label}</span>; } } return null; }, }, { key: "softResponsiblePersonName", title: $t("page.change.ledger.softResponsiblePersonName"), align: "center", minWidth: 50, width: 110, maxWidth: 200, sorter: true, resizable: true, }, { key: "elecResponsiblePersonName", title: $t("page.change.ledger.elecResponsiblePersonName"), align: "center", minWidth: 50, width: 110, maxWidth: 200, sorter: true, resizable: true, }, // { // key: "changeResponsiblePerson", // title: $t("page.change.ledger.changeResponsiblePerson"), // align: "center", // minWidth: 50, // }, { key: "canUpgrade", title: $t("page.change.ledger.canUpgrade"), align: "center", minWidth: 50, width: 80, maxWidth: 100, sorter: true, resizable: true, typeRecord: canUpgradeRecord, render: (row) => { console.log(row.canUpgrade); if (row.canUpgrade) { // console.log( row.canUpgrade, canUpgradeRecord[ // row.canUpgrade as Api.Change.canUpgrade // ]) const label = $t( canUpgradeRecord[row.canUpgrade as Api.Change.canUpgrade], ); return <NTag type="default">{label}</NTag>; } return null; }, }, { key: "fmtCustomerDemandTime", title: $t("page.change.ledger.customerDemandTime"), align: "center", width: 100, sorter: true, resizable: true, render: (row) => row.fmtCustomerDemandTime === "1970-01-01" ? null : row.fmtCustomerDemandTime, }, { key: "fmtSoftCompletionTime", title: $t("page.change.ledger.softCompletionTime"), align: "center", width: 100, sorter: true, resizable: true, render: (row) => row.fmtSoftCompletionTime === "1970-01-01" ? null : row.fmtSoftCompletionTime, }, { key: "fmtHardCompletionTime", title: $t("page.change.ledger.hardCompletionTime"), align: "center", width: 100, sorter: true, resizable: true, render: (row) => row.fmtHardCompletionTime === "1970-01-01" ? null : row.fmtHardCompletionTime, }, { key: "operate", title: $t("common.operate"), align: "center", width: 130, fixed: "right", render: (row) => ( <div class="flex-center gap-8px"> {hasAuth("B_ChangeLedger_Upgrade") ? ( <NButton type="primary" ghost size="small" onClick={() => { const href = generateZtUri(`${row?.hwswco_upgrade_url}`); window.open(href, "_blank"); }} > {$t("common.upgrade")} </NButton> ) : null} {hasAuth("B_ChangeLedger_Assign") ? ( <NButton type="primary" ghost size="small" onClick={() => { const href = generateZtUri(`${row?.hwswco_url}`); window.open(href, "_blank"); }} > {$t("common.assign")} </NButton> ) : null} </div> ), }, ], }); const { drawerVisible, operateType, editingData, handleAdd, handleEdit, handleClone, checkedRowKeys, onBatchDeleted, onDeleted, // closeDrawer } = useTableOperate(data, getData); const handleSorterChange = (newSorter: DataTableSortState) => { let columnKey = String(newSorter.columnKey); // 移除fmt前缀(不区分大小写) if (/^fmt/i.test(columnKey)) { columnKey = columnKey.substring(3); } // 小驼峰转下划线命名(优化连续大写字母处理) columnKey = columnKey .replace(/([a-z])([A-Z])/g, "$1_$2") .replace(/([A-Z])([A-Z][a-z])/g, "$1_$2") .toLowerCase(); // 处理排序状态 if (newSorter.order === "ascend") { searchParams.orderList = [columnKey]; } else if (newSorter.order === "descend") { searchParams.orderList = ["-" + columnKey]; } else { searchParams.orderList = []; } getData(); }; const { hasAuth } = useAuth(); const { bool: uploadVisible, setTrue: openModal } = useBoolean(); async function handleBatchDelete() { // request const { error } = await fetchBatchDeleteChange({ ids: checkedRowKeys.value, }); if (!error) { onBatchDeleted(); } } async function handleDelete(id: number) { // request const { error } = await fetchDeleteChange({ id }); if (!error) { onDeleted(); } } interface Emits { (e: "update-total", payload: number | undefined): void; } const emit = defineEmits<Emits>(); watch( () => mobilePagination.value.itemCount, (newVal, oldVal) => { emit("update-total", newVal); }, { deep: true }, ); getData(); const buList = ref<any[]>([ "DDP", "MDP", "FEP", "VDF", "CLEAN", "ETCH1", "ETCH2", "ETCH3", "HDF", ]); </script> <template> <div class="min-h-500px flex-col-stretch gap-16px overflow-hidden lt-sm:overflow-auto" > <LedgerSearch v-model:model="searchParams" @reset="resetSearchParams" @search="getData" /> <NCard :bordered="false" size="small" class="sm:flex-1-hidden card-wrapper"> <template #header >{{ $t("page.change.ledger.title") }} <span style="font-size: 10px" >({{ $t("datatable.itemCount", { total: mobilePagination?.itemCount, }) }})</span > <NRadioGroup v-model:value="searchParams.dept" size="small" style="margin-top: 5px; border-top: 1px sloid var(--n-border-color)" @update:value=" () => { getData(); } " > <NRadioButton v-for="(item, key) in buList" :key="key" :value="item" :label="item" > </NRadioButton> </NRadioGroup> </template> <template #header-extra> <TableHeaderOperation v-model:columns="columnChecks" :disabled-delete="checkedRowKeys.length === 0" :loading="loading" table-id="api" @add="handleAdd" @delete="handleBatchDelete" @refresh="getData" > <template #default> <TableDownload :size="checkedRowKeys.length" :ids="checkedRowKeys" :columns="columns" :apiParams="searchParams" :apiFn="fetchGetChangeLedgerList" excelName="变更台账" /> </template> </TableHeaderOperation> </template> <NDataTable v-model:checked-row-keys="checkedRowKeys" :columns="columns" :data="data" size="small" :flex-height="!appStore.isMobile" :scroll-x="2400" :loading="loading" remote :row-key="(row) => row.id" :pagination="mobilePagination" class="sm:h-full" @update:sorter="handleSorterChange" /> </NCard> </div> </template> <style scoped></style> bulist和searchParams.dept的转换
最新发布
08-16
<script setup lang="tsx"> import { DataTableSortState, NButton, NTag, SelectOption } from "naive-ui"; import { fetchGetChangeLedgerList, fetchBatchDeleteChange, fetchDeleteChange, } from "@/service/api"; import { generateZtUri } from "@/plugins"; import { $t } from "@/locales"; import { useAppStore } from "@/store/modules/app"; import { useTable, useTableOperate } from "@/hooks/common/table"; import { useAuth } from "@/hooks/business/auth"; import LedgerSearch from "./modules/ledger-search.vue"; import { useBoolean } from "@sa/hooks"; import { canUpgradeRecord } from "@/constants/business"; import { ref, onMounted, watch, h } from "vue"; // import {useDepartment} from "@/hooks/common/useDepartment" // 导入嵌入模态框 import { getFullDeptOptions } from "@/service/api/"; // 导入完整部门选项服务 import { renderTooltip2, smartTextSplit } from "@/utils/other"; // 存储完整部门选项 const fullDeptOptions = ref<SelectOption[]>([]); // 加载完整部门列表 onMounted(async () => { fullDeptOptions.value = await getFullDeptOptions(); }); const appStore = useAppStore(); const { columns, columnChecks, data, getData, loading, mobilePagination, searchParams, resetSearchParams, } = useTable({ apiFn: fetchGetChangeLedgerList, showTotal: true, apiParams: { current: 1, size: 10, // if you want to use the searchParams in Form, you need to define the following properties, and the value is null // the value can not be undefined, otherwise the property in Form will not be reactive source: null, pecoName: null, peco: null, softwareChange: null, projectno: null, dept: null, canUpgrade: null, softResponsiblePerson: null, elecResponsiblePerson: null, changeResponsiblePerson: null, customerDemandTime: null, softCompletionTime: null, hardCompletionTime: null, fmtCustomerDemandTime: null, fmtSoftCompletionTime: null, fmtHardCompletionTime: null, orderList: [], }, columns: () => [ { type: "selection", align: "center", width: 48, }, { key: "index", title: $t("common.index"), align: "center", width: 64, sorter: false, }, { key: "hwswcoId", title: $t("page.change.ledger.hwswcoId"), align: "left", minWidth: 50, width: 80, maxWidth: 200, sorter: true, fixed: "left", resizable: true, // render: (row) => ( // <div class="flex-center gap-8px"> // <a href={`${row?.hwswco_url}${row.hwswcoId}.html`} target='_blank' style='color:#646cff'> // {row.hwswcoId} // </a> // </div> // ), render: (row) => { //const href = `${row?.test_url}${row.testProcessId}?zentaosid=${appStore.zenTaoSid}`; const contents: any[] = []; contents.push( `未填写${$t("page.change.ledger.hwswcoId")}, 无法跳转禅道`, ); if (row.hwswcoId !== null) { return h( NButton, { strong: true, secondary: true, size: "small", type: "info", onClick: () => { const href = generateZtUri(`${row?.hwswco_url}`); window.open(href, "_blank"); }, }, { default: () => row.hwswcoId, }, ); } else { return <NTag>{row.hwswcoId}</NTag>; } }, }, { key: "source", title: $t("page.change.ledger.source"), align: "center", width: 80, sorter: true, resizable: true, }, { key: "pecoName", title: $t("page.change.ledger.pecoName"), align: "center", minWidth: 50, width: 100, maxWidth: 200, sorter: true, resizable: true, render: (row) => { const contents: any[] = smartTextSplit(row.pecoName, 50); return row.pecoName ? renderTooltip2(row.pecoName.slice(0, 10), contents) : null; }, }, { key: "peco", title: $t("page.change.ledger.peco"), align: "center", minWidth: 50, width: 100, maxWidth: 200, sorter: true, resizable: true, }, { key: "softwareChange", title: $t("page.change.ledger.softwareChange"), align: "center", minWidth: 50, width: 100, maxWidth: 200, sorter: true, resizable: true, }, { key: "projectno", title: $t("page.change.ledger.projectno"), align: "center", minWidth: 40, width: 80, maxWidth: 100, sorter: true, resizable: true, }, { key: "dept", title: $t("page.change.ledger.dept"), align: "center", width: 130, sorter: true, render: (row) => { // 使用完整部门选项映射部门名称 if (row.dept && fullDeptOptions.value.length > 0) { const dept = fullDeptOptions.value.find( (option) => option.value === row.dept, ); if (dept) { return <spn>{dept.label}</spn>; } } return null; }, }, { key: "softResponsiblePersonName", title: $t("page.change.ledger.softResponsiblePersonName"), align: "center", minWidth: 50, width: 110, maxWidth: 200, sorter: true, resizable: true, }, { key: "elecResponsiblePersonName", title: $t("page.change.ledger.elecResponsiblePersonName"), align: "center", minWidth: 50, width: 110, maxWidth: 200, sorter: true, resizable: true, }, // { // key: "changeResponsiblePerson", // title: $t("page.change.ledger.changeResponsiblePerson"), // align: "center", // minWidth: 50, // }, { key: "canUpgrade", title: $t("page.change.ledger.canUpgrade"), align: "center", minWidth: 50, width: 80, maxWidth: 100, sorter: true, resizable: true, typeRecord: canUpgradeRecord, render: (row) => { console.log(row.canUpgrade); if (row.canUpgrade) { // console.log( row.canUpgrade, canUpgradeRecord[ // row.canUpgrade as Api.Change.canUpgrade // ]) const label = $t( canUpgradeRecord[row.canUpgrade as Api.Change.canUpgrade], ); return <NTag type="default">{label}</NTag>; } return null; }, }, { key: "fmtCustomerDemandTime", title: $t("page.change.ledger.customerDemandTime"), align: "center", width: 100, sorter: true, resizable: true, render: (row) => row.fmtCustomerDemandTime === "1970-01-01" ? null : row.fmtCustomerDemandTime, }, { key: "fmtSoftCompletionTime", title: $t("page.change.ledger.softCompletionTime"), align: "center", width: 100, sorter: true, resizable: true, render: (row) => row.fmtSoftCompletionTime === "1970-01-01" ? null : row.fmtSoftCompletionTime, }, { key: "fmtHardCompletionTime", title: $t("page.change.ledger.hardCompletionTime"), align: "center", width: 100, sorter: true, resizable: true, render: (row) => row.fmtHardCompletionTime === "1970-01-01" ? null : row.fmtHardCompletionTime, }, { key: "operate", title: $t("common.operate"), align: "center", width: 130, fixed: "right", render: (row) => ( <div class="flex-center gap-8px"> {hasAuth("B_ChangeLedger_Upgrade") ? ( <NButton type="primary" ghost size="small" onClick={() => { const href = generateZtUri(`${row?.hwswco_upgrade_url}`); window.open(href, "_blank"); }} > {$t("common.upgrade")} </NButton> ) : null} {hasAuth("B_ChangeLedger_Assign") ? ( <NButton type="primary" ghost size="small" onClick={() => { const href = generateZtUri(`${row?.hwswco_url}`); window.open(href, "_blank"); }} > {$t("common.assign")} </NButton> ) : null} </div> ), }, ], }); const { drawerVisible, operateType, editingData, handleAdd, handleEdit, handleClone, checkedRowKeys, onBatchDeleted, onDeleted, // closeDrawer } = useTableOperate(data, getData); // 定义排序器 // const sorter = ref<DataTableSortState | null>(null); // // 使用自定义钩子 // const { sortTable } = useTableSort(data, sorter); // 处理排序器变化 const handleSorterChange = (newSorter: DataTableSortState) => { let columnKey = String(newSorter.columnKey); // 移除fmt前缀(不区分大小写) if (/^fmt/i.test(columnKey)) { columnKey = columnKey.substring(3); } // 小驼峰转下划线命名(优化连续大写字母处理) columnKey = columnKey .replace(/([a-z])([A-Z])/g, "$1_$2") .replace(/([A-Z])([A-Z][a-z])/g, "$1_$2") .toLowerCase(); // 处理排序状态 if (newSorter.order === "ascend") { searchParams.orderList = [columnKey]; } else if (newSorter.order === "descend") { searchParams.orderList = ["-" + columnKey]; } else { searchParams.orderList = []; } getData(); }; const { hasAuth } = useAuth(); const { bool: uploadVisible, setTrue: openModal } = useBoolean(); async function handleBatchDelete() { // request const { error } = await fetchBatchDeleteChange({ ids: checkedRowKeys.value, }); if (!error) { onBatchDeleted(); } } async function handleDelete(id: number) { // request const { error } = await fetchDeleteChange({ id }); if (!error) { onDeleted(); } } function edit(id: number) { handleEdit(id); } function clone(id: number) { handleClone(id); } interface Emits { (e: "update-total", payload: number | undefined): void; } const emit = defineEmits<Emits>(); watch( () => mobilePagination.value.itemCount, (newVal, oldVal) => { emit("update-total", newVal); }, { deep: true }, ); // async function handleDownload() { // // 请求cosnt {data, error } = await fetchGetProblemList({size:xxx,current:1}) // if (checkedRowKeys.value.length === 0) { // window.$message?.warning('请选择需要导出的数据!'); // return; // } // const { data:responseData, error } = await fetchGetChangeLedgerList({ // size: checkedRowKeys.value.length, // current: 1, // ids: checkedRowKeys.value, // }); // if (error) { // console.error("获取数据时出错:", error); // alert("获取数据时发生错误,请稍后再试。"); // return; // } // // 关键修改:将部门ID转换为部门名称 // const processedRecords = responseData.records.map(record => { // // 查找匹配的部门选项 // const deptOption = fullDeptOptions.value.find( // option => option.value === record.dept // ); // // 转换canUpgrade数值为文本标签 // const upgradeLabel = canUpgradeRecord[record.canUpgrade as keyof typeof canUpgradeRecord] // ? $t(canUpgradeRecord[record.canUpgrade as keyof typeof canUpgradeRecord]) // : record.canUpgrade; // 未匹配时保留原值 // // 返回新对象(保留原数据,替换dept和canUpgrade字段) // return { // ...record, // dept: deptOption ? deptOption.label : record.dept, // canUpgrade: upgradeLabel // 替换为转换后的文本 // }; // }); // // 翻译表头 // const titleMap = { // hwswcoId: $t("page.change.ledger.hwswcoId"), // source: $t("page.change.ledger.source"), // pecoName: $t("page.change.ledger.pecoName"), // peco: $t("page.change.ledger.peco"), // softwareChange:$t("page.change.ledger.softwareChange"), // projectno: $t("page.change.ledger.projectno"), // dept: $t("page.change.ledger.dept"), // softResponsiblePersonName: $t("page.change.ledger.softResponsiblePersonName"), // elecResponsiblePersonName: $t("page.change.ledger.elecResponsiblePersonName"), // canUpgrade: $t("page.change.ledger.canUpgrade"), // // customerDemandTime: $t("page.change.ledger.customerDemandTime"), // // softCompletionTime: $t("page.change.ledger.softCompletionTime"), // // hardCompletionTime: $t("page.change.ledger.hardCompletionTime"), // fmtCustomerDemandTime: $t("page.change.ledger.fmtCustomerDemandTime"), // fmtSoftCompletionTime: $t("page.change.ledger.fmtSoftCompletionTime"), // fmtHardCompletionTime: $t("page.change.ledger.fmtHardCompletionTime"), // }; // const headers = Object.keys(titleMap).map((key) => titleMap[key]); // const sheetData = [headers]; // processedRecords.forEach(record => { // const row = Object.keys(titleMap).map(key => record[key]); // sheetData.push(row); // }); // const sheetName = $t("page.change.ledger.title"); // const sheets: SheetData[] = [ // { // sheetName: sheetName, // data: sheetData, // }, // ]; // exportXlsx(sheets, `${sheetName}`); // } // 在页面加载时获取最新数据 getData(); </script> <template> <div class="min-h-500px flex-col-stretch gap-16px overflow-hidden lt-sm:overflow-auto" > <LedgerSearch v-model:model="searchParams" @reset="resetSearchParams" @search="getData" /> <NCard :bordered="false" size="small" class="sm:flex-1-hidden card-wrapper"> <template #header >{{ $t("page.change.ledger.title") }} <span style="font-size: 10px" >({{ $t("datatable.itemCount", { total: mobilePagination?.itemCount, }) }})</span > </template> <template #header-extra> <TableHeaderOperation v-model:columns="columnChecks" :disabled-delete="checkedRowKeys.length === 0" :loading="loading" table-id="api" @add="handleAdd" @delete="handleBatchDelete" @refresh="getData" > <template #default> <TableDownload :size="checkedRowKeys.length" :ids="checkedRowKeys" :columns="columns" :apiParams="searchParams" :apiFn="fetchGetChangeLedgerList" excelName="变更台账" /> </template> </TableHeaderOperation> </template> <NDataTable v-model:checked-row-keys="checkedRowKeys" :columns="columns" :data="data" size="small" :flex-height="!appStore.isMobile" :scroll-x="2400" :loading="loading" remote :row-key="(row) => row.id" :pagination="mobilePagination" class="sm:h-full" @update:sorter="handleSorterChange" /> </NCard> </div> </template> <style scoped></style>
08-16
### 如何在 C# 中声明和初始化 `List<DataTable>` 对象 在 C# 中,`List<T>` 是一种泛型集合类,用于存储一组类型的对象。要声明并初始化一个包含多个 `DataTable` 的列表 (`List<DataTable>`) ,可以按照以下方式实现: #### 声明和初始化 以下是声明和初始化 `List<DataTable>` 的标准方法[^1]: ```csharp using System; using System.Collections.Generic; using System.Data; class Program { static void Main() { // 声明并初始化 List<DataTable> List<DataTable> dataTableList = new List<DataTable>(); // 创建第一个 DataTable 并添加到列表中 DataTable table1 = new DataTable("Table1"); table1.Columns.Add("Column1", typeof(string)); table1.Rows.Add("Value1"); // 将 DataTable 添加到 List 中 dataTableList.Add(table1); // 创建第二个 DataTable 并添加到列表中 DataTable table2 = new DataTable("Table2"); table2.Columns.Add("Column2", typeof(int)); table2.Rows.Add(42); // 继续将另一个 DataTable 添加到 List 中 dataTableList.Add(table2); // 验证数据表的数量 Console.WriteLine($"Number of DataTables in list: {dataTableList.Count}"); } } ``` 上述代码展示了如何创建一个空的 `List<DataTable>` 列表,并向其中添加两个不同的 `DataTable` 实例。 #### 转换操作 如果需要将此列表转换为数组形式,则可以利用 `.ToArray()` 方法完成这一过程[^2]: ```csharp // 使用 ToArray() 方法将 List<DataTable> 转换为 DataTable[] 数组 DataTable[] dataArray = dataTableList.ToArray(); Console.WriteLine($"Number of DataTables in array: {dataArray.Length}"); ``` 通过这种方式,可以在必要时轻松切换两种结构之间的表示形式。 #### 动态处理场景下的注意事项 当涉及更复杂的动态查询需求(如分组合计),可能需要用到 LINQ 或扩展方法来增强功能[^3]。然而,在这种情况下需要注意性能优化以及内存管理等问题。 ---
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