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int n = (int)cmd.ExecuteScalar();
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C# code:
string sql = "select count(*) from " + tabName;
OleDbCommand cmd = new OleDbCommand(sql, conn);
cmd.Connection.Open();
int n = (int)cmd.ExecuteScalar(); // Õâ¾ÍÊÇÄãËùÒªµÄ
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// int n = int.Parse(cmd.ExecuteScalar().ToString());
conn.Close();
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