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织梦dedeeims网站打不开网站建设的费用是多少

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织梦dedeeims网站打不开,网站建设的费用是多少,seo一级域名和二级域名,wordpress清空文章备份并对齐id安装依赖库：NPOI 创建XSSFWorkbook和Sheet 设置表头行添加数据验证： 身份证列用COUNTIF公式确保唯一地址相关列锁定固定值学段列设置三级下拉固定值通过单元格赋值实现输出 using NPOI.SS.UserModel; using NPOI.XSSF.UserModel; using NPOI.SS…

安装依赖库：NPOI
在这里插入图片描述

创建XSSFWorkbook和Sheet
设置表头行
添加数据验证：
身份证列用COUNTIF公式确保唯一
地址相关列锁定固定值
学段列设置三级下拉
固定值通过单元格赋值实现
输出

using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using NPOI.SS.Util;
using System.IO;/// <summary>
/// 下载模板
/// </summary>
/// <returns></returns>
public ActionResult DownloadTemplate(DownloadTemplateDto input) {if (input.total< 1) throw new UserFriendlyException("人数不能为0");var stream = GenerateExcel(input.total);var data= stream.ToArray();return new FileContentResult(data, "application/octet-stream");//application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
}private MemoryStream GenerateExcel(int rowTotal)
{rowTotal = rowTotal + 10;//总行数// 1. 创建工作簿和工作表IWorkbook workbook = new XSSFWorkbook();ISheet sheet = workbook.CreateSheet("基础信息");// 2. 创建列名行// 2. 设置列名（共12列）string[] headers = { "姓名", "身份证号", "现住省", "现住市", "现住区", "联系电话","详细地址", "学校名称", "学校编号", "学段", "年级", "班级" };IRow headerRow = sheet.CreateRow(0);for (int i = 0; i < headers.Length; i++){headerRow.CreateCell(i).SetCellValue(headers[i]);}// 3. 设置数据验证规则IDataValidationHelper validationHelper = sheet.GetDataValidationHelper();// 规则1：身份证号列唯一性验证CellRangeAddressList idRange = new CellRangeAddressList(1, rowTotal, 1, 1); // B列IDataValidationConstraint idConstraint = validationHelper.CreateCustomConstraint("COUNTIF(B:B, B1)=1");IDataValidation idValidation = validationHelper.CreateValidation(idConstraint, idRange);idValidation.CreateErrorBox("重复错误", "身份证号必须唯一！");sheet.AddValidationData(idValidation);// 规则2：固定值验证（省、市、区、学校名称、学校编号）SetFixedValue(sheet, 2, "北京市", rowTotal); // C列：现住省SetFixedValue(sheet, 3, "昌平区", rowTotal); // D列：现住市SetFixedValue(sheet, 4, "A街道", rowTotal); // E列：街道SetFixedValue(sheet, 7, deptName, rowTotal); // H列：学校名称SetFixedValue(sheet, 8, deptId, rowTotal); // I列：学校编号// 规则3：学段下拉选择（小学/初中/高中）CellRangeAddressList stageRange = new CellRangeAddressList(1, rowTotal, 9, 9); // J列IDataValidationConstraint stageConstraint = validationHelper.CreateExplicitListConstraint(new string[] { "小学", "初中", "高中", "高三", "中专", "技校", "大学" });IDataValidation stageValidation = validationHelper.CreateValidation(stageConstraint, stageRange);stageValidation.CreateErrorBox("输入错误", "请选择下拉选中对应值！");sheet.AddValidationData(stageValidation);// 规则4：年级CellRangeAddressList grade = new CellRangeAddressList(1, rowTotal, 10, 10); // K列IDataValidationConstraint gradeConstraint = validationHelper.CreateExplicitListConstraint(new string[] { "一年级", "二年级", "三年级", "四年级", "五年级", "六年级","初一", "初二", "初三", "高一", "高二", "高三", "大一", "大二", "大三", "大四" });IDataValidation gradeValidation = validationHelper.CreateValidation(gradeConstraint, grade);gradeValidation.CreateErrorBox("输入错误", "请选择下拉选中对应值！");sheet.AddValidationData(gradeValidation);// 5. 流式输出MemoryStream stream = new MemoryStream();workbook.Write(stream, true);stream.Position = 0; // 重置流位置 return stream;
}// 辅助方法：为整列设置固定值
private void SetFixedValue(ISheet sheet, int columnIndex, string value,int rowTotal)
{for (int rowIndex = 1; rowIndex <= 10000; rowIndex++){IRow row = sheet.GetRow(rowIndex) ?? sheet.CreateRow(rowIndex);row.CreateCell(columnIndex).SetCellValue(value);}
}