插件：Aspose.Cells
没有安装office插件也能使用；
导出：不能使用ajax异步·
/// <summary>
/// 导出试题
/// </summary>
/// <param name="userId">用户Id</param>
/// <param name="courseId">课程Id</param>
/// <returns></returns>
[HttpGet]
public FilePathResult ExportQuestions(int userId, int courseId)
{
// 工作薄
Workbook BuildReport_WorkBook = new Workbook();
//sheets集合
Worksheets sheets = BuildReport_WorkBook.Worksheets;
//试题表
Worksheet BuildReport_WorkSheet = BuildReport_WorkBook.Worksheets[0]; // sheet1
BuildReport_WorkBook.Worksheets[0].Name = "试题表";
BuildReport_WorkSheet.FreezePanes(1, 1, 1, 0); //冻结第一行
BuildReport_WorkSheet.AutoFitColumns();//让各列自适应宽度
Cells BuildReportCells = BuildReport_WorkSheet.Cells; //单元格
//表头
BuildReportCells[0, 0].PutValue("试题Id");
BuildReportCells[0, 1].PutValue("课程Id");
BuildReportCells[0, 2].PutValue("试题类型");
//第二个sheet
BuildReport_WorkBook.Worksheets.Add("试题描述");
Worksheet BuildReport_WorkSheet_Desc = BuildReport_WorkBook.Worksheets["试题描述"]; //sheet2
BuildReport_WorkSheet_Desc.FreezePanes(1, 1, 1, 0); //冻结第一行
Cells BuildReportCells_Desc = BuildReport_WorkSheet_Desc.Cells;
//表头
BuildReportCells_Desc[0, 0].PutValue("试题描述Id");
BuildReportCells_Desc[0, 1].PutValue("试题Id");
BuildReportCells_Desc[0, 2].PutValue("试题描述");
BuildReportCells_Desc[0, 3].PutValue("试题解析");
BuildReportCells_Desc[0, 4].PutValue("试题描述(不包含html字符)");
//列
BuildReportCells[i, 0].PutValue(item.Id);
BuildReportCells[i, 1].PutValue(item.CourseId);
BuildReportCells[i, 2].PutValue(item.QuestionType);
BuildReportCells_Desc[j, 0].PutValue(questionDesc.ID);
BuildReportCells_Desc[j, 1].PutValue(questionDesc.QuestionId);
BuildReportCells_Desc[j, 2].PutValue(questionDesc.Description);
BuildReportCells_Desc[j, 3].PutValue(questionDesc.Analyses);
//文件路径
string fileDirPath = "/Downloads/试题" + userId + "_" + courseId;
string downPath = Server.MapPath(fileDirPath);
if (!Directory.Exists(downPath))
{
Directory.CreateDirectory(downPath);
}
System.IO.File.SetAttributes(downPath, FileAttributes.Normal);
string nowTime = DateTime.Now.ToString("yyyyMMddHHmmssfff");
string tempFile = Path.GetTempFileName();
string saveFile = Server.MapPath(fileDirPath + "/" + "试题" + "_" + userId + "_" + courseId + ".xls");
BuildReport_WorkBook.Save(saveFile);
return File(saveFile, "application/octet-stream", "试题" + "_" + userId + "_" + courseId + ".xls");
}
导出
导入： view,
需要注意2个问题：
1. 注意给form表单加上enctype = "multipart/form-data" 属性，否则会导致Action的参数HttpPostedFileBase 对象接收不到文件。
2. 注意文件大小，IIS中默认上传的文件大小为4MB ，超过这大小的文件需要在修改配置文件。
<div style="display:none" >
<div id="divImportQuestions" class="easyui-dialog" title="导入试题" closed="true" style="width:400px;height:200px;padding:10px;" data-options="iconCls:‘icon-save‘,modal:true">
@using (Html.BeginForm("ImportQuestions", "ManageCourse", FormMethod.Post, new { enctype = "multipart/form-data", id = "frmImport" }))
{
<input id="fileImport" type="file" name="fileImport" />
<div style="padding:5px;text-align:center;">
<a id="btnCommit" href="javascript:void(0);" onclick="ImportQuestions()" class="easyui-linkbutton" iconcls="icon-ok">确 定</a>
<a href="javascript:void(0);" onclick="top.ClosedlgWindow();" class="easyui-linkbutton" iconcls="icon-cancel">取 消</a>
</div>
<input id="hidUserId" type="hidden" name="hidUserId" />
<input id="hidCourseId" type="hidden" name="hidCourseId" />
<input id="hidUserName" type="hidden" name="hidUserName" />
}
@*<form id="frmImport" action="/admin/ManageCourse/ImportQuestions" method="post" enctype="multipart/form-data">
<input id="fileImport" type="file" name="fileImport" />
<div style="padding:5px;text-align:center;">
<a id="btnCommit" href="javascript:void(0);" onclick="ImportQuestions()" class="easyui-linkbutton" iconcls="icon-ok">确 定</a>
<a href="javascript:void(0);" onclick="top.ClosedlgWindow();" class="easyui-linkbutton" iconcls="icon-cancel">取 消</a>
</div>
<input id="hidUserId" type="hidden" name="hidUserId" />
<input id="hidCourseId" type="hidden" name="hidCourseId" />
</form>*@
</div>
</div>
导入： controller
/// <summary>
/// 导入试题
/// </summary>
/// <param name="userId">用户Id</param>
/// <param name="courseId">课程Id</param>
/// <returns>int userId, int courseId,</returns>
[HttpPost]
public ActionResult ImportQuestions(HttpPostedFileBase upFileBase)
{
HttpPostedFileBase fileBase = Request.Files["fileImport"];
if (fileBase != null)
{
#region 保存文件
string fileName = Path.GetFileName(fileBase.FileName);
string fileNameNoExt = Path.GetFileNameWithoutExtension(fileBase.FileName);
string extension = Path.GetExtension(fileName);
//if (extension.ToLower() != ".zip") //extension.ToLower() != ".xls" || extension.ToLower() != ".xlsx" ||
//{
// //window.location.href=‘@Url.Action(‘a‘,‘b‘)‘
// return Content("<script type=‘text/javascript‘>alert(‘请上传zip格式的压缩文件‘);window.location.href=‘/admin/ImportQuestions‘;</script>");
//}
string filePath = "/UploadFile/试题/"; // +DateTime.Now.ToString("yyyyMMdd") + "/";
if (!Directory.Exists(Server.MapPath(filePath))) //文件夹
{
Directory.CreateDirectory(Server.MapPath(filePath));
}
string nowTime = DateTime.Now.ToString("yyyyMMddHHmmssfff");
string fullFileName = Server.MapPath(filePath + nowTime + "_" + userId + "_" + courseId + "_" + fileName);//文件名
fileBase.SaveAs(fullFileName); //保存在服务器
#endregion
string fileFullName = Path.Combine(strFileUrl, Path.GetFileName(file.Name));
#region 导入EXECL
Workbook BuildReport_WorkBook = new Workbook();
BuildReport_WorkBook.Open(fileFullName);
Worksheets sheets = BuildReport_WorkBook.Worksheets;
//试题表
Worksheet workSheetQuestion = BuildReport_WorkBook.Worksheets["试题表"]; // sheet1
Cells cellsQuestion = workSheetQuestion.Cells; //单元格
Worksheet workSheetDesc = BuildReport_WorkBook.Worksheets["试题描述"]; //sheet2
Cells cellsDesc = workSheetDesc.Cells;
//试题表
for (int i = 1; i < cellsQuestion.MaxDataRow + 1; i++)
{
#region 试题表
Question modQuestion = new Question();//实体
int questionId = cellsQuestion[i, 0].IntValue;
dicQuestion[i] = cellsQuestion[i, 0].IntValue;
modQuestion.CourseId = cellsQuestion[i, 1].IntValue;
modQuestion.QuestionType = cellsQuestion[i, 2].IntValue;
//数据库操作
}
for (int j = 1; j < cellsDesc.MaxDataRow + 1; j++)
{
int questionDescFK = cellsDesc[j, 1].IntValue;
if (questionId == questionDescFK)
{
Question_Desc modQuestionDesc = new Question_Desc(); //实体
modQuestionDesc.QuestionId = questionIdNew; //新的
modQuestionDesc.Description = cellsDesc[j, 2].StringValue.Trim();
modQuestionDesc.Analyses = cellsDesc[j, 3].StringValue.Trim();
modQuestionDesc.DescriptionText = cellsDesc[j, 4].StringValue.Trim();
//数据库操作
}
}
#endregion
}
return View();
}
导入Controller
● 由于接收多个文件，所以控制器方法的参数变成了IEnumerable<HttpPostedFileBase> files
● 变量files与前台视图的name属性值对应
● 如果没有指定的文件夹，就创建一个文件夹
为什么使用HttpPostedFileBase而不是FormCollection来接收文件
public sealed class FormCollection : NameValueCollection, IValueProvider
可见，FormCollection是键值集合，键是string类型，值是string类型，而上传的文件类型不是string，所以不能用FormCollection作为参数来接收文件。
参考资料：
MVC中的文件上传http://blog.sina.com.cn/s/blog_75a555e40101q8i7.html
Confusing required maxRequestLength and maxAllowedContentLength settings
http://forums.iis.net/t/1169846.aspx
关于MVC4.0 WebAPI上传图片重命名以及图文结合
http://www.cnblogs.com/ang/archive/2012/10/24/2634176.html
ASP.NET Web Api Self Host大文件上传功能
http://www.cnblogs.com/fenglin1985/archive/2013/01/29/2879926.html
首发地址:http://www.yuanxj.net/2014/02/upladfile/
时间： 2024-10-13 02:49:01