背景: 实现导出Excel功能.
技术: ASP.NET , 采用`Aspose.Cells`第三方组件, C# 实现通用部分.
根据前台Ext Grid完成导入Excel中文列与实际存储列的对应关系. 组织完 Workbook 组织, 保存到Server临时目录, 返回地址下载, 每次都为新故文件名 采用了 随机数:
//_reportName :Excel名称
//_reportName: 报表名称
//_headerStruct: 包含数据库列与Excel中文列的对应关系. (此处取Ext表头)
public string ExportServerExcelFile(Aspose.Cells.Workbook w, string fileName)
{
if (!Directory.Exists(Server.MapPath("~/ExportFile/")))
Directory.CreateDirectory(Server.MapPath("~/ExportFile/"));
w.Save(Server.MapPath("~/ExportFile/") + fileName);
return "http://" + Request.Url.Host + ":" + Request.Url.Port + "/ExportFile/" + fileName;
}
public string ExportExcelAll(string queryP, string _reportName, string _headerStruct)
{
DataTable dt = ....; //取查到库中数据
string jsonData = Ext.Net.JSON.Serialize(dt);
Workbook w = this.CreateWorkbook(jsonData, _reportName, _headerStruct);
string fileName = _reportName.Split('(')[0] + "_" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xlsx";
return this.ExportServerExcelFile(w, fileName);
}
public Workbook CreateWorkbook(string jsonData, string _reportName, string _headerStruct)
{
var w = new Workbook();
Worksheet ws = (Worksheet)w.Worksheets[0];
if (!string.IsNullOrEmpty(_headerStruct))
SerHeader1(JSON.Deserialize<dynamic[]>(_headerStruct), ws);
RangeHeader(ws);
//设置标题
ws.Cells[0, 0].PutValue(_reportName);
Range titleRange = ws.Cells.CreateRange(0, 0, 1, lastColIndex);
#region ===样式
var style = new Style { HorizontalAlignment = TextAlignmentType.Center, Font = { Size = 25, IsBold = true } };
style.Borders.SetStyle(Aspose.Cells.CellBorderType.Thin);
style.Borders.DiagonalStyle = Aspose.Cells.CellBorderType.None;
var styleFlag = new StyleFlag
{
HorizontalAlignment = true,
VerticalAlignment = true,
Font = true,
FontSize = true,
FontBold = true,
Borders = true
};
titleRange.ApplyStyle(style, styleFlag);
titleRange.RowHeight = 26;
titleRange.Merge();
var cellStyle1 = new Style();
cellStyle1.Borders.SetStyle(Aspose.Cells.CellBorderType.Thin);
cellStyle1.Borders.DiagonalStyle = Aspose.Cells.CellBorderType.None;
cellStyle1.IsTextWrapped = true;
var cellStyleNumber = new Style();
cellStyleNumber.Borders.SetStyle(Aspose.Cells.CellBorderType.Thin);
cellStyleNumber.Borders.DiagonalStyle = Aspose.Cells.CellBorderType.None;
cellStyleNumber.Number = 2;
#endregion
//列集合
JavaScriptSerializer serializer = new JavaScriptSerializer();
serializer.MaxJsonLength = int.MaxValue;
List<grid> _Test = serializer.Deserialize<List<grid>>(_headerStruct);
var companies = JSON.Deserialize<Dictionary<string, string>[]>(jsonData);
for (int i = 0; i < companies.Length; i++)
{
int tmpColIndex = 0;
foreach (var item in companies[i])
{
if (headerNames.IndexOf(item.Key) > -1)
{
var list = _Test.Where(p => p.DataIndex == item.Key).ToList(); //获取列名称
var cColumn = list[0];
//初始样式
ws.Cells[lastLevel + 1 + i, headerNames.IndexOf(item.Key)].SetStyle(cellStyle1, true);
if (cColumn.DataType == "float" || cColumn.DataType == "decimal") //1. 数字类型
{
if (IsDecimal(item.Value))
{
ws.Cells[lastLevel + 1 + i, headerNames.IndexOf(item.Key)].PutValue(ToDouble(item.Value));//金额保留2位数
//ws.Cells[lastLevel + 1 + i, headerNames.IndexOf(item.Key)].SetStyle(cellStyleNumber);
}
}
else if (cColumn.DataType == "date") //2. 日期类型
{
ws.Cells[lastLevel + 1 + i, headerNames.IndexOf(item.Key)].PutValue(
(string.IsNullOrWhiteSpace(item.Value) ? "" : Convert.ToDateTime(item.Value).ToString("yyyy-MM-dd hh:mm:ss"))
);
}
else //3. 字符串和集合类型auto
{
ws.Cells[lastLevel + 1 + i, headerNames.IndexOf(item.Key)].PutValue(item.Value);
}
//★获得要隐藏的列
if (cColumn.Hiden == true)//列需要隐藏: 字典类型
{
var index = headerNames.IndexOf(item.Key);//列索引
ws.Cells.HideColumn(index);
}
}
tmpColIndex++;
}
}
return w;
}
private void RangeHeader(Worksheet ws)
{
for (int row = 1; row <= lastLevel; row++)
{
for (int col = 0; col < lastColIndex; col++)
{
var style = new Style
{
HorizontalAlignment = TextAlignmentType.Center,
VerticalAlignment = TextAlignmentType.Center
};
style.Borders.SetStyle(Aspose.Cells.CellBorderType.Thin);
style.Borders.DiagonalStyle = Aspose.Cells.CellBorderType.None;
var styleFlag = new StyleFlag
{
HorizontalAlignment = true,
VerticalAlignment = true,
Font = true,
FontSize = true,
FontBold = true,
Borders = true
};
ws.Cells[row, col].SetStyle(style);
if (ws.Cells[row, col].Value != null)
{
RangeCell(ws, row, col);
}
}
}
foreach (Range item in rc.Where(m => m != null))
{
var style = new Style
{
HorizontalAlignment = TextAlignmentType.Center,
VerticalAlignment = TextAlignmentType.Center
};
style.Borders.SetStyle(Aspose.Cells.CellBorderType.Thin);
style.Borders.DiagonalStyle = Aspose.Cells.CellBorderType.None;
var styleFlag = new StyleFlag
{
HorizontalAlignment = true,
VerticalAlignment = true,
Font = true,
FontSize = true,
FontBold = true,
Borders = true
};
item.ApplyStyle(style, styleFlag);
try
{
item.Merge();
}
catch (Exception)
{
}
}
}
/// <summary>
/// grid表头
/// </summary>
[Serializable]
public class grid
{
public string Text { get; set; }
public string DataIndex { get; set; }
public string Width { get; set; }
public List<grid> Cols { get; set; }
public bool Hiden { get; set; }
public string xtype { get; set; }
public string DataType { get; set; }//列类型
}
其中, 传入
_headerStruct
参数格式截图所示, 包括grid 类用于反序列化, 类似于, 关键用到了Text, DataType, DataIndex 关键, 特殊处理了Ext的多表头, 例如Cols 非末级就忽略了(函数
RangeHeader的作用
):
