private static bool ExtendedPropertyExists(string connectionString, string property, string user, string table, string column)
{
bool retval = false;
if (CanUseExtendedProperty(connectionString))
{
string userName = string.Empty;
string userValue = string.Empty;
string tableName = string.Empty;
string tableValue = string.Empty;
string columnName = string.Empty;
string columnValue = string.Empty;
property = "'" + property + "'";
if (user == string.Empty)
{
userName = "NULL";
userValue = "NULL";
}
else
{
userName = "'user'";
userValue = "'" + user + "'";
}
if (table == string.Empty)
{
tableName = "NULL";
tableValue = "NULL";
}
else
{
tableName = "'table'";
tableValue = "'" + table + "'";
}
if (column == string.Empty)
{
columnName = "NULL";
columnValue = "NULL";
}
else
{
columnName = "'column'";
columnValue = "'" + column + "'";
}
System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection();
System.Data.SqlClient.SqlDataReader externalReader = null;
try
{
conn.ConnectionString = connectionString;
conn.Open();
SqlCommand command = new SqlCommand();
command.CommandText = String.Format("SELECT value FROM ::fn_listextendedproperty({0}, {1}, {2}, {3}, {4}, {5}, {6})", new object[] { property, userName, userValue, tableName, tableValue, columnName, columnValue });
command.CommandType = System.Data.CommandType.Text;
command.Connection = conn;
externalReader = command.ExecuteReader();
if (externalReader.Read())
{
retval = true;
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (externalReader != null)
externalReader.Close();
if (conn != null)
conn.Close();
}
}
return retval;
}
#endregion