C#读取 excel中的表名sheet名不是默认的sheet1,shee2就取不到值了 c# 如何读取自定义的sheet值？c#读取excel最佳解决方案

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/// <summary>

/// 不指定sheet

/// </summary>

/// <param name="fileName"></param>

/// <returns></returns>

public static DataTable ExcelToDataTable_sheet(string fileName,string sheet)

{

OleDbConnection conn = null;

DataTable dt = new DataTable();

string strCon = "";

//string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" + fileName;

if (fileName.Substring(fileName.LastIndexOf(".") + 1).ToLower().Equals("xlsx"))

{

strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Extended Properties='Excel 12.0;HDR=No;IMEX=1';Data Source=" + fileName;

}

else if (fileName.Substring(fileName.LastIndexOf(".") + 1).ToLower().Equals("xls"))

{

strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties='Excel 8.0;HDR=No;IMEX=1';Data Source=" + fileName;

}

else

{

MessageBox.Show("选择的文件格式不对！", "错误");

return null;

}

try

{

string sheetname = "";

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

conn = new OleDbConnection(strCon);

conn.Open();

System.Data.DataTable dt_excel = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });

for (int i = 0; i < dt_excel.Rows.Count; i++)

{//循环取得所有表名

sheetname = dt_excel.Rows[i]["TABLE_NAME"].ToString();

sheetnamelist.Add(sheetname);

}

string CurrSheet = sheetnamelist[0].ToString();//取得第一个表名

string strCom = "Select * From [" + CurrSheet + "]";

OleDbDataAdapter adp = new OleDbDataAdapter(strCom, conn);

adp.Fill(dt);

return dt;

}

catch (Exception)

{

return null;

}

finally

{

if (conn != null && conn.State != ConnectionState.Closed)

{

conn.Close();

}

}

}