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汽車大全
C# 讀取Excel中的數據
#region 讀取Excel中的數據
/// <summary>
/// 讀取Excel中的數據
/// </summary>
/// <param name="excelFile">Excel文件名及路徑,EG:C:\Users\JK\Desktop\導入測試.xls</param>
/// <returns>Excel中的數據</returns>
private DataTable GetTable(string fileName)
{
OleDbConnection objConn = null;
System.Data.DataTable dt = null;
string connString = string.Empty;
OleDbDataAdapter da = new OleDbDataAdapter();
//獲取Excel工作薄中Sheet頁(工作表)名集合
String[] ss = this.GetExcelSheetNames(fileName);
DataTable dataTable = new DataTable();
try
{
string FileType = fileName.Substring(fileName.LastIndexOf("."));
if (FileType == ".xls")
connString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + fileName + ";Extended Properties=Excel 8.0;";
else//.xlsx
connString = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + fileName + ";" + ";Extended Properties=\"Excel 12.0;HDR=YES;IMEX=1\"";
// 創建連接對象
objConn = new OleDbConnection(connString);
// 打開數據庫連接
objConn.Open();
string sql_F = "Select * FROM [{0}]";
for (int i = 0; i < ss.Length;i++ )
{
da.SelectCommand = new OleDbCommand(String.Format(sql_F, ss[i].ToString() + "$"), objConn);
da.Fill(dataTable);
MessageBox.Show("第"+i+"次表中數據量="+dataTable.Rows.Count.ToString());
}
dataTable = DeleteBlank(dataTable,9);
MessageBox.Show("刪除空行後,表中數據量=" + dataTable.Rows.Count.ToString());
return dataTable;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
return null;
}
finally
{
// 清理
if (objConn != null)
{
objConn.Close();
objConn.Dispose();
}
if (dt != null)
{
dt.Dispose();
}
}
}
#endregion
#region 刪除指定表中的空白行
/// <summary>
///刪除指定表中的空白行
/// </summary>
/// <param name="dt">表名</param>
/// <param name="ColNum">Excel中的列數</param>
/// <returns>刪除空白行後的DataTable</returns>
private DataTable DeleteBlank(DataTable dt,int ColNum)
{
if (dt == null || dt.Rows.Count==0)
{
return dt;
}
//刪除其中的空行(注意for循環的形式)
for (int i = dt.Rows.Count - 1; i >= 0; i--)
{
DataRow row = dt.Rows[i];
bool flag = true;
//當某行的ColNum列,均為空時,改行為空
for (int j = 0; j < ColNum; j++)
{
object o = row[j];
if (o != DBNull.Value && Convert.ToString(o).Trim().Length > 0)
{
flag = false;
break;
}
}
if (flag)
{
dt.Rows[i].Delete();
}
}
dt.AcceptChanges();
//把行中DBNull列替換成空字符串
for (int k = dt.Rows.Count - 1; k >= 0; k--)
{
DataRow row = dt.Rows[k];
for (int z = 0; z < ColNum; z++)
{
object o = row[z];
if (o == DBNull.Value)
{
if (dt.Columns[z].DataType == typeof(string))
{
row[z] = "";
}
}
}
}
dt.AcceptChanges();
return dt;
}
#endregion
小注：
讀取Excel的時候，會自動處理表頭。
最後更新：2017-04-03 07:57:16