笔记整理 使用OleDb，将Excel导入DataSet

public class ExcelUtil
{
    /// <summary>
    /// 从Excel文件导入DataSet
    /// Excel的连接字符串说明(详细参看 http://www.connectionstrings.com/excel )：
    /// HDR=Yes 表示第一行是表头，没有数据，读取时忽略第一行。设置为 No 时则从第一行读取。
    /// IMEX=1  表示告诉OleDb驱动，所有数据将作为字符串读取(numbers,dates等)
    /// 注意：有时候因为ISAM驱动没有安装，设置HDR和IMEX会出异常。去掉即可。
    /// </summary>
    /// <param name="fileName">Excel文件路径</param>
    /// <param name="firstRowIsHeader">第一行是否是表头</param>
    /// <returns>Excel数据，一个Sheet对应一个DataTable</returns>
    public static DataSet GetDataSetFromExcel(string fileName, string sheetName = "", bool firstRowIsHeader = true)
    {
        if (!System.IO.File.Exists(fileName))
            throw new ArgumentException("file is not exist!");

        var ds = new DataSet();
        var strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='{0}';Extended Properties=Excel 8.0;";
        //if (firstRowIsHeader)
        //    strConn += "HDR=Yes;";
        strConn = string.Format(strConn, fileName);
        using (var conn = new OleDbConnection(strConn))
        {
            conn.Open();
            DataTable excelSchema = null;
            string sql = "select * from [{0}]";
            var adapter = new OleDbDataAdapter();
            adapter.SelectCommand = conn.CreateCommand();

            if (string.IsNullOrEmpty(sheetName))
            {
                excelSchema = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,
                                   new object[] { null, null, null, "TABLE" });
                
                foreach (DataRow row in excelSchema.Rows)
                {

                    var sheet = row["TABLE_NAME"].ToString();
                    sql = string.Format(sql, sheet);
                    adapter.SelectCommand.CommandText = sql;
                    adapter.Fill(ds, sheet);
                }
            }
            else
            {
                sql = string.Format(sql, sheetName + "{1}quot;);
                adapter.SelectCommand.CommandText = sql;
                adapter.Fill(ds, sheetName);
            }
            conn.Close();
        }
        return ds;
    }




}

上面代码中46行的 "quot;" 应为 "$"

 

 

Excel查询的时候，加上范围也可以。这样就能指定范围获得数据。比如： (1) string sql = "select * from [{0}A:C]"; (2) string sql = "select * from [{0}A1:C100]";

使用：

 

private void btnExcel2Data_Click(object sender, EventArgs e)
{
    openFileDialog1.Filter = "Excel Files | *.xls"; 
    var ret = openFileDialog1.ShowDialog();
    if (ret == System.Windows.Forms.DialogResult.OK)
    {
        DataSet ds = GetDataSetFromExcel(openFileDialog1.FileName, false);
        this.dataGridView1.DataSource = ds.Tables[0];
    }
}