DataTable作为数据源导出Excel

#region DataTable生成Excel
/// <summary>
/// DataTable生成Excel
/// </summary>
/// <param name="dtList">DataTable</param>
/// <param name="fileName">文件名</param>
/// <returns>返回文件名(包含扩展名)</returns>
public static string ExportToExcel(DataTable dtList, string fileName)
{
string pathToFiles = System.Web.HttpContext.Current.Server.MapPath(ExportFilesPath);
string etsName = ".xls";
//获取保存路径
string path = pathToFiles + fileName + etsName;
Aspose.Cells.Workbook wb = new Workbook();
Worksheet ws = wb.Worksheets[0];
Cells cell = ws.Cells;
//cell.SetRowHeight(0, 20);   //设置行高

//表头样式
Style stHeadLeft = wb.Styles[wb.Styles.Add()];
stHeadLeft.HorizontalAlignment = TextAlignmentType.Left;       //文字居中
stHeadLeft.Font.Name = "宋体";
stHeadLeft.Font.IsBold = true;                                                             //设置粗体
stHeadLeft.Font.Size = 14;                                                                    //设置字体大小
Style stHeadRight = wb.Styles[wb.Styles.Add()];
stHeadRight.HorizontalAlignment = TextAlignmentType.Right;       //文字居中
stHeadRight.Font.Name = "宋体";
stHeadRight.Font.IsBold = true;                                                             //设置粗体
stHeadRight.Font.Size = 14;                                                                    //设置字体大小

//内容样式
Style stContentLeft = wb.Styles[wb.Styles.Add()];
stContentLeft.HorizontalAlignment = TextAlignmentType.Left;
stContentLeft.Font.Size = 10;
Style stContentRight = wb.Styles[wb.Styles.Add()];
stContentRight.HorizontalAlignment = TextAlignmentType.Right;
stContentRight.Font.Size = 10;

//赋值给Excel内容
for (int col = 0; col < dtList.Columns.Count; col++)
{
Style stHead = null;
Style stContent = null;
//设置表头
string columnType = dtList.Columns[col].DataType.ToString();
switch (columnType.ToLower())
{
case "system.string":
stHead = stHeadLeft;
stContent = stContentLeft;
break;
default:
stHead = stHeadRight;
stContent = stContentRight;
break;
}
//插入表头到Excel内
cell[0, col].PutValue(dtList.Columns[col].ColumnName);
cell[0, col].SetStyle(stHead);

for (int row = 0; row < dtList.Rows.Count; row++)
{
object _value=dtList.Rows[row][col];
if (_value != Convert.DBNull)
{
//插入内容到Excel内
switch (columnType.ToLower())
{
case "system.int32":
cell[row + 1, col].PutValue(Convert.ToInt32(_value));
break;
case "system.int64":
cell[row + 1, col].PutValue(Convert.ToInt64(_value));
break;
case "system.datetime":
cell[row + 1, col].PutValue(Convert.ToDateTime(_value).ToString("yyyy/M/d HH:mm"));
break;
case "system.boolean":
cell[row + 1, col].PutValue(Convert.ToBoolean(_value));
break;
default:
cell[row + 1, col].PutValue(_value.ToString());
break;
}
}
cell[row + 1, col].SetStyle(stContent);
}
}
wb.Save(path);

return ExportFilesPath + fileName + etsName;
}
#endregion

private static void putValue(Cells cell, object value, int row, int column, Style st)
{
cell[row, column].PutValue(value);
cell[row, column].SetStyle(st);
}

#region  将easyUI grid数据直接导出生成Excel
/// <summary>
/// 将easyUI grid数据直接导出生成Excel
/// </summary>
/// <param name="data">数据内容</param>
/// <param name="fileName">excel文件名</param>
/// <returns>返回文件路径</returns>
public static string GridToExcel(string data, string fileName)
{
//获取前台post提交的数据
//定义生成文件的目录，获取绝对地址
string pathToFiles = System.Web.HttpContext.Current.Server.MapPath("/ExcelFile/UploadFile");
//定义生成文件的名称
string fname = fileName + ".xls";
//组合成文件的路径
string path = @"" + pathToFiles + "\\" + fname;

//判断是否已经存在文件
if (!System.IO.File.Exists(path))
{
//新建文件，并写入数据
System.IO.File.WriteAllText(path, data, Encoding.UTF8);
}
else
{
//文件已存在，添加写入数据
System.IO.File.AppendAllText(path, data, Encoding.UTF8);//如果是gb2312的xml申明，第三个编码参数修改为Encoding.GetEncoding(936)
}
return ExportFilesPath + fname;
}
#endregion