/// <summary>
/// 执行查询SQL,返回受影响行数
/// </summary>
/// <param name="sql">sql语句</param>
/// <param name="parameters">参数</param>
/// <returns></returns>
public int IntQuery(string sql, SQLiteParameter[] parameters)
{
int result = 0;
try
{
SQLiteDBHelper dbHelper = new SQLiteDBHelper();
result = dbHelper.ExecuteNonQuery(sql, parameters);
}
catch
{
}
return(result);
}
/// <summary>
/// 执行查询SQL,返回查询结果表
/// </summary>
/// <param name="sql">sql语句</param>
/// <param name="parameters">参数</param>
/// <returns>查询结果表</returns>
public DataTable DataTableQuery(string sql, SQLiteParameter[] parameters)
{
DataTable data = new DataTable();
try
{
SQLiteDBHelper dbHelper = new SQLiteDBHelper();
data = dbHelper.ExecuteDataTable(sql, parameters);
}
catch
{
}
return(data);
}
/// <summary>
/// 执行查询SQL,返回查询结果的首行首列
/// </summary>
/// <param name="sql">sql语句</param>
/// <param name="parameters">参数</param>
/// <returns></returns>
public string StringQuery(string sql, SQLiteParameter[] parameters)
{
string result = string.Empty;
try
{
SQLiteDBHelper dbHelper = new SQLiteDBHelper();
DataTable data = dbHelper.ExecuteDataTable(sql, parameters);
if (data != null && data.Rows.Count > 0)
{
result = data.Rows[0][0].ToString();
}
}
catch
{
}
return(result);
}