Oledb 异常 - 上传 Excel 文件时定义的字段过多

Question

这是我上传 Excel 的编码......

if (RevenueDumpFileUpload.HasFile)
        {
            string strFilePathOnServer = ConfigurationManager.AppSettings["RevenueDumpFileLocation"];
            String sConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath(strFilePathOnServer) + RevenueDumpFileUpload.FileName + ";Extended Properties=\"Excel 8.0;IMEX=1;HDR=NO;TypeGuessRows=0;ImportMixedTypes=Text\"";
            string strPostedFileName = RevenueDumpFileUpload.PostedFile.FileName;
            if (strPostedFileName != string.Empty && RevenueDumpFileUpload.PostedFile.ContentLength != 0)
            {
                //Save-Upload File to server. 
                RevenueDumpFileUpload.PostedFile.SaveAs(Server.MapPath(strFilePathOnServer) + RevenueDumpFileUpload.FileName);
                RevenueDumpFileUpload.FileContent.Dispose();
            }
            OleDbConnection Exlcon = new OleDbConnection(sConnectionString);
            try
            {
                //Exlcon.Open();
            }
            catch
            {
                return;
            }
            OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM [Owner$]", Exlcon);
            OleDbDataAdapter objAdapter1 = new OleDbDataAdapter();
            objAdapter1.SelectCommand = objCmdSelect;
            objDataset1.Clear();
            objAdapter1.Fill(objDataset1, "XLData");
            DataRow rowDel = objDataset1.Tables["XLData"].Rows[0];
            objDataset1.Tables["XLData"].Rows.Remove(rowDel);
            objDataset1.Tables["XLData"].Columns[0].ColumnName = "Industry";
            objDataset1.Tables["XLData"].Columns[1].ColumnName = "Company Name";
            objDataset1.Tables["XLData"].Columns[2].ColumnName = "Website";
            objDataset1.Tables["XLData"].Columns[3].ColumnName = "Address";
            objDataset1.Tables["XLData"].Columns[4].ColumnName = "State";
            objDataset1.Tables["XLData"].Columns[5].ColumnName = "Company PhoneNumber";
            objDataset1.Tables["XLData"].Columns[6].ColumnName = "Contact Person";
            objDataset1.Tables["XLData"].Columns[7].ColumnName = "Title Description";
            objDataset1.Tables["XLData"].Columns[8].ColumnName = "Company Size";
            objDataset1.Tables["XLData"].Columns[9].ColumnName = "Mail ID";
            objDataset1.Tables["XLData"].Columns[10].ColumnName = "Guess MailID";
            objDataset1.Tables["XLData"].Columns[11].ColumnName = "Phone No";
            objDataset1.Tables["XLData"].Columns[12].ColumnName = "Linked in id";
            objDataset1.Tables["XLData"].Columns[13].ColumnName = "Comment";
            methodtosave();
        }

我收到错误填充方法......“太多字段未定义”。 只有“14”列......

Answer 1

请参阅下面的代码，尝试在选择字符串中给出所有位置，并检查连接字符串。

string sql = "SELECT F1, F2, F3, F4, F5 FROM [sheet1$] WHERE F1 IS NOT NULL";

OleDbConnection connection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + PrmPathExcelFile + @";Extended Properties=""Excel 8.0;IMEX=1;HDR=NO;TypeGuessRows=0;ImportMixedTypes=Text""");

OleDbCommand cmd = new OleDbCommand(sql, connection);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);

DataSet ds = new DataSet();
ds.Tables.Add("xlsImport", "Excel");
da.Fill(ds, "xlsImport");

// Remove the first row (header row)
DataRow rowDel = ds.Tables["xlsImport"].Rows[0];
ds.Tables["xlsImport"].Rows.Remove(rowDel);

ds.Tables["xlsImport"].Columns[0].ColumnName = "LocationID";
ds.Tables["xlsImport"].Columns[1].ColumnName = "PartID";
ds.Tables["xlsImport"].Columns[2].ColumnName = "Qty";
ds.Tables["xlsImport"].Columns[3].ColumnName = "UserNotes";
ds.Tables["xlsImport"].Columns[4].ColumnName = "UserID";

connection.Close(); 

  var data = ds.Tables["xlsImport"].AsEnumerable();
    var query = data.Where(x => x.Field<string>("LocationID") == "COOKCOUNTY").Select(x =>
                new Contact
                {
                    LocationID= x.Field<string>("LocationID"),
                    PartID = x.Field<string>("PartID"),
                    Quantity = x.Field<string>("Qty"),
                    Notes = x.Field<string>("UserNotes"),
                    UserID = x.Field<string>("UserID")
                });

Answer 2

该错误表示字段未定义，因此我想您的数据表至少对于数据中的某些行来说比 14 列宽。 Excel 可能很有趣，因为空但已初始化的单元格被视为数据单元格。

查看 objDataset1.Tables["XLData"].Columns.Count 并查看它返回的内容。您可能需要在列名称分配的末尾添加一个函数，该函数循环其余列并分配任意名称 (column{x})。

您也可以更改 select 语句以仅检索前 14 行，而不是 select *。

Answer 3

我认为问题出在您的数据集中。 objDataset1.Clear(); 只是清除数据，而不是结构。尝试使用 objDataset1 = new DataSet();

编辑：

尝试使用连接字符串：

@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" 
            + Server.MapPath(strFilePathOnServer) 
            + RevenueDumpFileUpload.FileName 
            + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";