如何合并excel工作簿中多个表到dataset中？

[wwp_0157]

如何合并excel工作簿中多个表到dataset中？求救！！

[chinasdp]

private void button1_Click(object sender, System.EventArgs e)
{
System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\\aaa.xls;Extended Properties=Excel 8.0;");
conn.Open();
DataTable schemaTable = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] {null, null, null, "TABLE"});
DataSet ds = new DataSet();
string sql = "";
try
{
for(int i = 0 ; i < schemaTable.Rows.Count ; i ++)
{
sql = "SELECT * FROM [" + schemaTable.Rows[i]["TABLE_NAME"].ToString() +"]";
System.Data.OleDb.OleDbDataAdapter ada = new System.Data.OleDb.OleDbDataAdapter(sql, conn);
ada.Fill(ds, "[" + schemaTable.Rows[i]["TABLE_NAME"].ToString() +"]");
}
dataGrid1.DataSource = ds;
}
catch(Exception ex)
{
MessageBox.Show(ex.ToString());
}
}