我需要将 Excel 文件中的数据加载到 SQL Server 数据库中。Excel 文件是通过将数据从 Web 应用程序下载到数据集中来创建的。从 SQL Server 数据库中的表中提取数据以生成 Excel。当我尝试将同一个 Excel 文件上传到同一个表中时，它会出错。
HResult=-2147467259 Message=Could not find installable ISAM.
Source=Microsoft JET Database Engine ErrorCode=-2147467259
'Report.xls' 的文件格式和扩展名与文件不匹配不能损坏或不安全。除非你相信它的来源，否则不要打开它。你还是要打开它吗？
这是将数据保存到数据库中的代码
private void SaveFileToDatabase(string filePath)
{
String fileExtension = Path.GetExtension(filePath);
String excelConnString = string.Empty;
//Create connection string to Excel work book
if (fileExtension == ".xls")
{
excelConnString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=""Excel 12.0;HDR=Yes;IMEX=1""", filePath);
//String excelConnString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0}; Extended Properties="Excel 8.0;HDR=Yes;IMEX=1""", filePath);
}
else
{
excelConnString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0""", filePath);
}
//Connection to Excel work book
using (OleDbConnection excelConnection = new OleDbConnection(excelConnString))
{
//OleDbCommand to fetch data from Excel
using (OleDbCommand cmd = new OleDbCommand("Select * from [working$]", excelConnection))
{
excelConnection.Open();
using (OleDbDataReader dReader = cmd.ExecuteReader())
{
using (SqlBulkCopy sqlBulk = new SqlBulkCopy(connect))
{
DBUtilities.RunSQLCommand("truncate table dbo.[DatabaseTable]");
//Destination table in db
sqlBulk.DestinationTableName = " DatabaseTable ";
sqlBulk.WriteToServer(dReader);
}
}
}
}
}
从表中的数据创建 Excel 文件的代码
private void ExportDataToExcel(String sprocCommand, String workBookName)
{
try
{
string attachment = "attachment; filename=report.xls";
Response.Clear();
Response.Buffer = true;
Response.Charset = string.Empty;
Response.AddHeader("cache-control", "private");
Response.AddHeader("Content-disposition", attachment);
//Response.AddHeader("Content-type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
Response.ContentType = "application/vnd.xls";
EnableViewState = false;
DataTable dt = DBUtilities.GetData();
DataView dv = dt.DefaultView;
dt = null;
dt = dv.ToTable();
Response.Write(SendExcelXMLFormat(dt, workBookName));
Response.End();
}
catch (Exception Ex)
{
////TOOD
}
}
private string SendExcelXMLFormat(DataTable dTable, string WorkSheetName)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine("<?xml version=\"1.0\"?> ");
sb.AppendLine("<?mso-application progid=\"Excel.Sheet\"?> ");
sb.AppendLine("<Workbook xmlns=\"urn:schemas-microsoft-com:office:spreadsheet\" ");
sb.AppendLine("xmlns:o=\"urn:schemas-microsoft-com:office:office\" ");
sb.AppendLine("xmlns:x=\"urn:schemas-microsoft-com:office:excel\" ");
sb.AppendLine("xmlns:ss=\"urn:schemas-microsoft-com:office:spreadsheet\" ");
sb.AppendLine("xmlns:html=\"http://www.w3.org/TR/REC-html40\"> ");
sb.AppendLine("<Styles> ");
sb.AppendLine("<Style ss:ID=\"s41\" ss:Name=\"60% - Accent1\"> ");
sb.AppendLine("<Font ss:FontName=\"Calibri\" x:Family=\"Swiss\" ss:Size=\"11\" ss:Color=\"#FFFFFF\"/> ");
sb.AppendLine("<Interior ss:Color=\"#95B3D7\" ss:Pattern=\"Solid\"/> ");
sb.AppendLine("</Style> ");
sb.AppendLine("</Styles> ");
sb.AppendLine("<Worksheet ss:Name=\"" + WorkSheetName+"\"> ");
sb.AppendLine("<Table>");
// Header Row
sb.AppendLine("<Row ss:AutoFitHeight=\"0\"> ");
foreach (DataColumn dc in dTable.Columns)
{
sb.AppendLine("<Cell ss:StyleID=\"s41\"><Data ss:Type=\"String\">" + dc.ColumnName + "</Data></Cell> ");
}
sb.AppendLine("</Row> ");
// Data Rows
foreach (DataRow row in dTable.Rows)
{
sb.AppendLine("<Row ss:AutoFitHeight=\"0\"> ");
for (int i = 0; i < dTable.Columns.Count; i++)
{
sb.AppendLine("<Cell><Data ss:Type=\"String\">" + Server.HtmlEncode(row[i].ToString()) + "</Data></Cell> ");
}
sb.AppendLine("</Row> ");
}
sb.AppendLine("</Table> ");
sb.AppendLine("</Worksheet> ");
sb.AppendLine("</Workbook> ");
return sb.ToString();
}