您的位置：首页 > 编程语言 > C#

C# 通过 oledb 操作Excel实例代码

2018-10-12 14:07 831 查看

整理文档，搜刮出一个C# 通过 oledb 操作Excel实例代码，稍微整理精简一下做下分享。

public string GetConnectionString()
{
Dictionary<string, string> props = new Dictionary<string, string>();

// XLSX - Excel 2007, 2010, 2012, 2013
props["Provider"] = "Microsoft.ACE.OLEDB.12.0;";
props["Extended Properties"] = "Excel 12.0 XML";
props["Data Source"] = @"C:\tools\MyExcel.xlsx";

// XLS - Excel 2003 and Older
//props["Provider"] = "Microsoft.Jet.OLEDB.4.0";
//props["Extended Properties"] = "Excel 8.0";
//props["Data Source"] = "C:\\MyExcel.xls";

var sb = new StringBuilder();

foreach (KeyValuePair<string, string> prop in props)
{
sb.Append(prop.Key);
sb.Append('=');
sb.Append(prop.Value);
sb.Append(';');
}

return sb.ToString();
}

public void WriteExcelFile()
{
string connectionString = GetConnectionString();

using (OleDbConnection conn = new OleDbConnection(connectionString))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conn;

cmd.CommandText = "CREATE TABLE [table1] (id INT, name VARCHAR, datecol DATE );";
cmd.ExecuteNonQuery();

cmd.CommandText = "INSERT INTO [table1](id,name,datecol) VALUES(1,'AAAA','2014-01-01');";
cmd.ExecuteNonQuery();

cmd.CommandText = "INSERT INTO [table1](id,name,datecol) VALUES(2, 'BBBB','2014-01-03');";
cmd.ExecuteNonQuery();

cmd.CommandText = "INSERT INTO [table1](id,name,datecol) VALUES(3, 'CCCC','2014-01-03');";
cmd.ExecuteNonQuery();

cmd.CommandText = "UPDATE [table1] SET name = 'DDDD' WHERE id = 3;";
cmd.ExecuteNonQuery();

conn.Close();
}
}

public DataSet ReadExcelFile()
{
DataSet ds = new DataSet();

string connectionString = GetConnectionString();

using (OleDbConnection conn = new OleDbConnection(connectionString))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conn;

// Get all Sheets in Excel File
DataTable dtSheet = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

// Loop through all Sheets to get data
foreach (DataRow dr in dtSheet.Rows)
{
string sheetName = dr["TABLE_NAME"].ToString();

if (!sheetName.EndsWith("$"))
continue;

// Get all rows from the Sheet
cmd.CommandText = "SELECT * FROM [" + sheetName + "]";

DataTable dt = new DataTable();
dt.TableName = sheetName;

OleDbDataAdapter da = new OleDbDataAdapter(cmd);
da.Fill(dt);

ds.Tables.Add(dt);
}

cmd = null;
conn.Close();
}

return ds;
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

您可能感兴趣的文章:

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航