/// <summary>
/// Enumerate columns info
/// </summary>
/// <param name="tableName">Table name</param>
/// <returns>Columns info list</returns>
public VDBColumnInfo[] EnumColumns(string tableName)
{
int position;
int columnsCount;
VDBColumnInfo[] columns;
if (!FindTable(tableName))
{
return(null);
}
position = this.position;
try
{
FindColumnSection();
GetInteger();
columnsCount = GetInteger();
columns = new VDBColumnInfo[columnsCount];
for (int i = 0; i < columnsCount; i++)
{
columns[i].Name = GetString();
columns[i].Caption = GetString();
columns[i].DataType = VistaDBAPI.NetDataType(GetChar().ToString());
columns[i].Width = GetInteger();
columns[i].Decimals = GetInteger();
columns[i].DefValue = GetString();
columns[i].Identity = GetBool();
columns[i].IncStep = GetDouble();
columns[i].UseDefValInUpdate = GetBool();
columns[i].AllowNull = GetBool();
columns[i].Description = GetString();
columns[i].ReadOnly = GetBool();
columns[i].Compressed = GetBool();
columns[i].Encrypted = GetBool();
columns[i].Hidden = GetBool();
columns[i].PrimaryKey = GetBool();
columns[i].Indexed = GetBool();
columns[i].Unicode = GetBool();
columns[i].FTS = GetBool();
}
}
finally
{
this.position = position;
}
return(columns);
}
private int InternalInitFieldDefs()
{
if (queryID <= 0)
{
return(0);
}
lock (syncRoot)
{
recordCount = VistaDBAPI.ivsql_RecCount(queryID);
columnCount = VistaDBAPI.ivsql_ColumnCount(queryID);
columns = new VistaDBColumn[columnCount];
char colType;
int len;
int columnCaptionWidth = 128;
StringBuilder columnCaption = new StringBuilder(columnCaptionWidth);
int columnNameWidth = 128;
StringBuilder columnName = new StringBuilder(columnNameWidth);
VistaDBType columntype;
bool allowNull, readOnly, autoIncrement, primaryKey, unique, reservedWord;
int dataSize, columnWidth;
string tempS;
for (int i = 0; i < columnCount; i++)
{
len = VistaDBAPI.ivsql_ColumnName(queryID, i + 1, columnName, columnNameWidth);
columnName.Length = len;
len = VistaDBAPI.ivsql_ColumnCaption(queryID, i + 1, columnCaption, columnCaptionWidth);
columnCaption.Length = len;
colType = VistaDBAPI.ivsql_ColumnType(queryID, i + 1);
tempS = colType.ToString();
columntype = VistaDBAPI.NetDataType(tempS);
dataSize = 0; // default
columnWidth = 0; // default
allowNull = !VistaDBAPI.ivsql_ColumnRequired(queryID, i + 1);
readOnly = VistaDBAPI.ivsql_ColumnReadOnly(queryID, i + 1);
autoIncrement = VistaDBAPI.ivsql_ColumnIsIdentity(queryID, i + 1);
primaryKey = VistaDBAPI.ivsql_ColumnIsPrimaryKey(queryID, i + 1);
unique = VistaDBAPI.ivsql_ColumnIsUnique(queryID, i + 1);
reservedWord = VistaDBAPI.ivsql_IsReservedWord(columnName.ToString());
switch (columntype)
{
case VistaDBType.Character:
columnWidth = VistaDBAPI.ivsql_ColumnWidth(queryID, i + 1);
dataSize = columnWidth;
break;
case VistaDBType.Varchar:
columnWidth = VistaDBAPI.ivsql_ColumnWidth(queryID, i + 1);
dataSize = columnWidth;
break;
case VistaDBType.Date:
dataSize = 8;
break;
case VistaDBType.DateTime:
dataSize = 8;
break;
case VistaDBType.Boolean:
dataSize = 2;
break;
case VistaDBType.Int32:
dataSize = 4;
break;
case VistaDBType.Int64:
dataSize = 8;
break;
case VistaDBType.Currency:
dataSize = 8;
break;
case VistaDBType.Double:
dataSize = 8;
break;
case VistaDBType.Memo:
case VistaDBType.Blob:
case VistaDBType.Picture:
dataSize = 2147483647;
break;
case VistaDBType.Guid:
dataSize = 16;
break;
}
columns[i] = new VistaDBColumn(columnName.ToString(), columntype, dataSize, (short)columnWidth, 0, allowNull, readOnly, primaryKey, unique, autoIncrement, 0, "", columnCaption.ToString(), "", reservedWord, false, false, false, false);
}
}
return(errorNumber);
}
private void InternalInitFieldDefs()
{
if (this.queryID == 0)
{
return;
}
string[] buffer;
string columnName, columnCaption;
VistaDBType columnType;
bool allowNull, readOnly, autoIncrement, primaryKey, unique, reservedWord;
int dataSize, columnWidth;
int index;
lock (this)
{
this.columns = new VistaDBColumn[this.columnCount];
buffer = srv_GetStructure();
index = 0;
for (int i = 0; i < this.columnCount; i++)
{
columnName = buffer[index];
columnType = VistaDBAPI.NetDataType(buffer[index + 1]);
columnWidth = Int32.Parse(buffer[index + 2], NumberStyles.AllowHexSpecifier);
columnCaption = buffer[index + 3];
allowNull = buffer[index + 4] != "Y";
readOnly = buffer[index + 5] == "Y";
autoIncrement = buffer[index + 6] == "Y";
primaryKey = buffer[index + 7] == "Y";
unique = buffer[index + 8] == "Y";
reservedWord = buffer[index + 9] == "Y";
dataSize = 0; // default
switch (columnType)
{
case VistaDBType.Character:
dataSize = columnWidth;
break;
case VistaDBType.Varchar:
dataSize = columnWidth;
break;
case VistaDBType.Date:
dataSize = 8;
break;
case VistaDBType.DateTime:
dataSize = 8;
break;
case VistaDBType.Boolean:
dataSize = 2;
break;
case VistaDBType.Int32:
dataSize = 4;
break;
case VistaDBType.Int64:
dataSize = 8;
break;
case VistaDBType.Currency:
dataSize = 8;
break;
case VistaDBType.Double:
dataSize = 8;
break;
case VistaDBType.Memo:
case VistaDBType.Blob:
case VistaDBType.Picture:
dataSize = 2147483647;
break;
case VistaDBType.Guid:
dataSize = 16;
break;
}
this.columns[i] = new VistaDBColumn(columnName, columnType, dataSize, (short)columnWidth, 0, allowNull, readOnly, primaryKey, unique, autoIncrement, 0, "", columnCaption, "", reservedWord, false, false, false, false);
index += 10;
}
}
}
