读取excel中的表格到datatable

留着自己以后参考

/// <summary>

/// 获取Excel的内容

/// 备注：把Excel读取到DataTable之后

/// 的列标题

/// </summary>

/// <param name="excelPath"></param>

/// <param name="HasColumn"></param>

/// <returns></returns>

public static System.Data.DataTable GetExcelTable(string excelPath, bool HasColumn)

{

try

{

//打开Excel连接

string connString = "";

OleDbConnection conn = null;

if (HasColumn == true)

{

conn = OpenExcelEx(excelPath, out connString); //连接

}

else

{

conn = OpenExcel(excelPath, out connString); //连接

}

//读取Excel



List<string> lstName = GetFirstSheetNames(connString);

System.Data.DataTable dtTable = null;

foreach (string strSheetName in lstName)

{

string strSql = "select * from [" + strSheetName + "]";

OleDbDataAdapter dataAdapter = new OleDbDataAdapter(strSql, conn); //查询

DataSet dtSet = new DataSet();

dataAdapter.Fill(dtSet);

System.Data.DataTable table = dtSet.Tables[0];

//table.Columns[0].ColumnName = table.Rows[0][table.Columns[0]].ToString();

//table.Rows.RemoveAt(0);

dataAdapter.Dispose();

if (table.Columns.Count > 1)

{

dtTable = table;

break;

}

}

conn.Close(); //cql 进程就不会被占用

return dtTable;

}

catch (Exception ex)

{

return null;

}

}

/// <summary>

/// 获取Excel的内容

/// 备注：把Excel读取到DataTable之后，默认把Excel的第一行作为Datatable

/// 的列标题

/// </summary>

/// <param name="excelPath"></param>

/// <param name="HasColumn">是否把一行做表头</param>

/// <returns></returns>

public static System.Data.DataTable GetExcelTableEX(string excelPath, bool HasColumn)

{

try

{

//打开Excel连接

string connString = "";

OleDbConnection conn = null;

if (HasColumn == true)

{

conn = OpenExcelEx(excelPath, out connString); //连接

}

else

{

conn = OpenExcel(excelPath, out connString); //连接

}

//读取Excel

List<string> lstName = GetFirstSheetNames(connString);

System.Data.DataTable dtTable = null;

foreach (string strSheetName in lstName)

{

string strSql = "select * from [" + strSheetName + "]";

OleDbDataAdapter dataAdapter = new OleDbDataAdapter(strSql, conn); //查询

DataSet dtSet = new DataSet();

dataAdapter.Fill(dtSet);

System.Data.DataTable table = dtSet.Tables[0];

foreach (DataColumn col in table.Columns)

{

col.ColumnName = table.Rows[0][col].ToString();

}

table.Rows.RemoveAt(0);

dataAdapter.Dispose();

if (table.Columns.Count > 1)

{

dtTable = table;

break;

}

}

conn.Close(); //cql 进程就不会被占用

return dtTable;

}

catch (Exception ex)

{

return null;

}

}

private static List<string> GetFirstSheetNames(string connectionString)

{

List<string> lstName = new List<string>();

using (OleDbConnection connection = new

OleDbConnection(connectionString))

{

connection.Open();

System.Data.DataTable schemaTable = connection.GetOleDbSchemaTable(

OleDbSchemaGuid.Tables,

new object[] { null, null, null, "TABLE" });

foreach (DataRow row in schemaTable.Rows)

{

string tableName = row[2].ToString().Trim();

lstName.Add(tableName);

}

connection.Close();

}

return lstName;

}



#region 打开Excel连接 ADO.Net

/// <summary>

/// 打开Excel文件,把一行做表头

/// 解决03版本和07版本Excel的访问驱动不兼容得问题

/// </summary>

/// <param name="excelPath">Excel文件全路径</param>

/// <param name="strConn">连接字符串</param>

/// <returns></returns>

public static OleDbConnection OpenExcelEx(string excelPath, out string strConn)

{

OleDbConnection conn = null;

//先用03版Excel连接方式

strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + excelPath + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";

if (!OpenExcelConnection(strConn, out conn))

{

//在尝试用07的连接方式

strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelPath + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\"";

if (!OpenExcelConnection(strConn, out conn)) return null;

}

return conn;

}

/// <summary>

/// 打开Excel文件

/// 解决03版本和07版本Excel的访问驱动不兼容得问题

/// </summary>

/// <param name="excelPath">Excel文件全路径</param>

/// <param name="strConn">连接字符串</param>

/// <returns></returns>

public static OleDbConnection OpenExcel(string excelPath, out string strConn)

{

OleDbConnection conn = null;

//先用03版Excel连接方式

strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + excelPath + ";Extended Properties=\"Excel 8.0;HDR=No;IMEX=1\"";

if (!OpenExcelConnection(strConn, out conn))

{

//在尝试用07的连接方式

strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excelPath + ";Extended Properties=\"Excel 12.0;HDR=No;IMEX=1\"";

if (!OpenExcelConnection(strConn, out conn)) return null;

}

return conn;

}

/// <summary>

/// 打开Excel文件

/// </summary>

/// <param name="connectString">连接字符串</param>

/// <param name="conn">连接信息</param>

/// <returns></returns>

private static bool OpenExcelConnection(string connectString, out OleDbConnection conn)

{

conn = new OleDbConnection(connectString);

try

{

conn.Open();

return true;

}

catch (Exception ex)

{

return false;

}

}