/// <summary>
/// 执行SQL语句，获得查询结果表
/// </summary>
/// <param name="pDbConn"></param>
/// <param name="pTrans"></param>
/// <param name="sSql"></param>
/// <returns></returns>
public DataTable GetDataTable(string sSql, OracleParameter[] opc)
{
DataTable pDataTable = new DataTable();
try
{
pCommand.CommandText = sSql;
pCommand.Parameters.Clear();
if (opc != null)
{
for (int i = 0; i < opc.Length; i++)
{
pCommand.Parameters.Add(opc[i]);
}
}
OracleDataAdapter pDbAdapter = new OracleDataAdapter(pCommand);
pDbAdapter.Fill(pDataTable);
return(pDataTable);
}
catch (Exception ep)
{
LogBN.WriteLog(typeof(DbAPI), "GetDataTable 程序段的异常" + ep + sSql);
//if (pTrans != null)
//{
// pTrans.Rollback();
//}
return(null);
}
}
/// <summary>
/// 执行存储过程，获得查询结果表
/// </summary>
/// <param name="sSql">存储过程名称</param>
/// <param name="opc">参数数组</param>
/// <returns></returns>
public DataTable GetDataTableFromProcedure(string sSql, OracleParameter[] opc)
{
var pDataTable = new DataTable();
try
{
pCommand.CommandType = CommandType.StoredProcedure;
pCommand.CommandText = sSql;
pCommand.Parameters.Clear();
if (opc != null)
{
foreach (var t in opc)
{
pCommand.Parameters.Add(t);
}
}
var pDbAdapter = new OracleDataAdapter(pCommand);
pDbAdapter.Fill(pDataTable);
return(pDataTable);
}
catch (Exception ep)
{
LogBN.WriteLog(typeof(DbAPI), "GetDataTableFromProcedure 程序段的异常" + ep + sSql);
return(null);
}
}
/// <summary>
/// 执行事务
/// </summary>
/// <param name="otList"></param>
public void RunOracleTransaction(List <Entity.OracleTransaction> otList)
{
if (otList == null || otList.Count <= 0)
{
return;
}
using (OracleConnection connection = new OracleConnection(PrepareConnectionString("")))
{
connection.Open();
OracleCommand command = connection.CreateCommand();
var transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted);
command.Transaction = transaction;
try
{
foreach (var ot in otList)
{
command.CommandText = ot.SqlString;
command.Parameters.Clear();
if (ot.Parameters == null || ot.Parameters.Count <= 0)
{
return;
}
foreach (var parameter in ot.Parameters)
{
command.Parameters.Add(new OracleParameter(parameter.Key, parameter.Value));
}
command.ExecuteNonQuery();
}
transaction.Commit();
}
catch (Exception ex)
{
LogBN.WriteLog(typeof(DbAPI), "执行事务RunOracleTransaction 程序段的异常" + ex.Message);
transaction.Rollback();
}
}
}
/// <summary>
/// 带参数
/// </summary>
/// <param name="pDbConn"></param>
/// <param name="sSql"></param>
/// <param name="pParams"></param>
/// <returns></returns>
public object ExecuteOracleScalar(string sSql, OracleParameter[] opc)
{
try
{
pCommand.CommandText = sSql;
pCommand.Parameters.Clear();
if (opc != null)
{
for (int i = 0; i < opc.Length; i++)
{
pCommand.Parameters.Add(opc[i]);
}
}
return(pCommand.ExecuteOracleScalar());
}
catch (Exception ep)
{
LogBN.WriteLog(typeof(DbAPI), "ExecuteOracleScalar 程序段的异常" + ep + sSql);
return(-1);
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="sSql">存储过程名称</param>
/// <param name="opc">参数数组</param>
/// <returns></returns>
public int ExecuteNonQueryByProcedure(string sSql, OracleParameter[] opc)
{
try
{
pCommand.CommandType = CommandType.StoredProcedure;
pCommand.CommandText = sSql;
pCommand.Parameters.Clear();
if (opc == null)
{
return(pCommand.ExecuteNonQuery());
}
foreach (var t in opc)
{
pCommand.Parameters.Add(t);
}
return(pCommand.ExecuteNonQuery());
}
catch (Exception ep)
{
LogBN.WriteLog(typeof(DbAPI), "ExecuteNonQueryByProcedure 程序段的异常" + ep + sSql);
return(-1);
}
}
/// <summary>
/// DataTable导出到Excel的MemoryStream
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
public static MemoryStream Export(DataTable dtSource, string strHeaderText)
{
try
{
var invisibleColumnCount = dtSource.Columns.Cast <DataColumn>().Count(item => item.Caption == "invisible");
for (int i = 0; i < invisibleColumnCount; i++)
{
dtSource.Columns.RemoveAt(0);
}
HSSFWorkbook workbook = new HSSFWorkbook();
var sheet = workbook.CreateSheet();
#region 右击文件 属性信息
{
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "NPOI";
workbook.DocumentSummaryInformation = dsi;
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = "Robin van Persie"; //填加xls文件作者信息
si.ApplicationName = "for downloading."; //填加xls文件创建程序信息
si.LastAuthor = "RvP"; //填加xls文件最后保存者信息
si.Comments = "RvP"; //填加xls文件作者信息
si.Title = "Title"; //填加xls文件标题信息
si.Subject = "Subject"; //填加文件主题信息
si.CreateDateTime = DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion
var dateStyle = workbook.CreateCellStyle();
var format = workbook.CreateDataFormat();
dateStyle.DataFormat = format.GetFormat("yyyy-MM-dd HH:mm:ss");
//取得列宽
int[] arrColWidth = new int[dtSource.Columns.Count];
foreach (DataColumn item in dtSource.Columns)
{
arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName).Length;
}
for (int i = 0; i < dtSource.Rows.Count; i++)
{
for (int j = 0; j < dtSource.Columns.Count; j++)
{
int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
if (intTemp > arrColWidth[j])
{
arrColWidth[j] = intTemp;
}
}
}
int rowIndex = 0;
foreach (DataRow row in dtSource.Rows)
{
#region 新建表，填充表头，填充列头，样式
if (rowIndex == 65535 || rowIndex == 0)
{
if (rowIndex != 0)
{
sheet = workbook.CreateSheet();
}
#region 表头及样式
{
var headerRow = sheet.CreateRow(0);
headerRow.HeightInPoints = 25;
headerRow.CreateCell(0).SetCellValue(strHeaderText);
var headStyle = workbook.CreateCellStyle();
headStyle.Alignment = HorizontalAlignment.Center;
var font = workbook.CreateFont();
font.FontHeightInPoints = 20;
font.Boldweight = 700;
headStyle.SetFont(font);
headerRow.GetCell(0).CellStyle = headStyle;
sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1));
}
#endregion
#region 列头及样式
{
var headerRow = sheet.CreateRow(1);
var headStyle = workbook.CreateCellStyle();
headStyle.Alignment = HorizontalAlignment.Center;
var font = workbook.CreateFont();
font.FontHeightInPoints = 10;
font.Boldweight = 700;
headStyle.SetFont(font);
foreach (DataColumn column in dtSource.Columns)
{
headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
headerRow.GetCell(column.Ordinal).CellStyle = headStyle;
//设置列宽
sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
}
}
#endregion
rowIndex = 2;
}
#endregion
#region 填充内容
var dataRow = sheet.CreateRow(rowIndex);
foreach (DataColumn column in dtSource.Columns)
{
var newCell = dataRow.CreateCell(column.Ordinal);
string drValue = row[column].ToString();
switch (column.DataType.ToString())
{
case "System.String": //字符串类型
newCell.SetCellValue(drValue);
break;
case "System.DateTime": //日期类型
DateTime dateV;
DateTime.TryParse(drValue, out dateV);
newCell.SetCellValue(dateV);
newCell.CellStyle = dateStyle; //格式化显示
break;
case "System.Boolean": //布尔型
bool boolV;
bool.TryParse(drValue, out boolV);
newCell.SetCellValue(boolV);
break;
case "System.Int16": //整型
case "System.Int32":
case "System.Int64":
case "System.Byte":
int intV;
int.TryParse(drValue, out intV);
newCell.SetCellValue(intV);
break;
case "System.Decimal": //浮点型
case "System.Double":
double doubV;
double.TryParse(drValue, out doubV);
newCell.SetCellValue(doubV);
break;
case "System.DBNull": //空值处理
newCell.SetCellValue("");
break;
default:
newCell.SetCellValue("");
break;
}
}
#endregion
rowIndex++;
}
using (MemoryStream ms = new MemoryStream())
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
workbook.Close();//一般只用写这一个就OK了，他会遍历并释放所有资源，但当前版本有问题所以只释放sheet
return(ms);
}
}
catch (Exception ex)
{
LogBN.WriteLog(typeof(NpoiHelper), "导出Excel的方法MemoryStream Export 程序段的异常" + ex);
return(null);
}
}