/// <summary>
/// Insert ID Column if table doesn't have primary key fields
/// </summary>
public void AddIDColumn()
{
if (PrimaryKeys == null || PrimaryKeys.Length < 1)
{
SqlColumnInformation scInfo = new SqlColumnInformation();
scInfo.Key = true;
scInfo.Identity = true;
scInfo.IdentityIncrement = 1;
scInfo.IdentitySeed = 1;
scInfo.Name = "AutoGenID";
scInfo.DataType = "int";
scInfo.Nulls = false;
Columns.Add(scInfo);
}
}
/// <summary>
/// Updates the SqlColumnCollection with any changes made since the last call to Refresh.
/// Refresh is automatically called once when the SqlTable.Columns collection is read.
/// </summary>
public void Refresh()
{
// Force internal refresh of tables
table.dmoTable.GetColumns().Refresh(false);
// Clear out old list
columns = new ArrayList();
for (int i = 0; i < table.dmoTable.GetColumns().GetCount(); i++)
{
NativeMethods.IColumn dmoColumn = table.dmoTable.GetColumns().Item(i + 1);
SqlColumnInformation columnInfo = new SqlColumnInformation(dmoColumn.GetInPrimaryKey(), dmoColumn.GetIdentity(), dmoColumn.GetName(), dmoColumn.GetDatatype(), dmoColumn.GetLength(), dmoColumn.GetNumericScale(), dmoColumn.GetNumericPrecision(), dmoColumn.GetAllowNulls(), dmoColumn.GetDRIDefault().GetText(), dmoColumn.GetIdentitySeed(), dmoColumn.GetIdentityIncrement(), dmoColumn.GetIsRowGuidCol());
SqlColumn column = new SqlColumn(columnInfo);
columns.Add(column);
column.dmoColumn = dmoColumn;
column.table = this.table;
}
}
/// <summary>
/// Adds a new column to the table with specified column information.
/// </summary>
/// <param name="columnInfo">
/// The column information for the column to add.
/// </param>
/// <returns>
/// If the operation succeeded, the return value is the column created.
/// </returns>
public SqlColumn Add(SqlColumnInformation columnInfo)
{
// Do some basic error checking - leave the rest up to DMO
if (columnInfo.Name == null || columnInfo.Name.Length == 0)
{
throw new ArgumentException(SR.GetString("SqlColumnCollection_MustHaveValidName"));
}
if (columnInfo.DataType == null || columnInfo.DataType.Length == 0)
{
throw new ArgumentException(SR.GetString("SqlColumnCollection_MustHaveValidDataType"));
}
if (this[columnInfo.Name] != null)
{
throw new ArgumentException(String.Format(SR.GetString("SqlColumnCollection_NameAlreadyExists"), columnInfo.Name));
}
// Create new DMO column
NativeMethods.IColumn dmoColumn = (NativeMethods.IColumn) new NativeMethods.Column();
dmoColumn.SetName(columnInfo.Name);
dmoColumn.SetDatatype(columnInfo.DataType);
dmoColumn.SetLength(columnInfo.Size);
dmoColumn.SetAllowNulls(columnInfo.Nulls);
dmoColumn.SetNumericPrecision(columnInfo.Precision);
dmoColumn.SetNumericScale(columnInfo.Scale);
dmoColumn.SetIdentity(columnInfo.Identity);
dmoColumn.SetIdentitySeed(columnInfo.IdentitySeed);
dmoColumn.SetIdentityIncrement(columnInfo.IdentityIncrement);
dmoColumn.SetIsRowGuidCol(columnInfo.IsRowGuid);
dmoColumn.GetDRIDefault().SetText(columnInfo.DefaultValue);
// Physically add the column
table.dmoTable.BeginAlter();
table.dmoTable.GetColumns().Add(dmoColumn);
table.dmoTable.DoAlter();
// If this column is to be included in the primary key, do some stuff
if (columnInfo.Key)
{
// Find out if there is a primary key...
NativeMethods.IKey primaryKey = null;
NativeMethods.IKeys keys = table.dmoTable.GetKeys();
for (int i = 0; i < keys.GetCount(); i++)
{
if (keys.Item(i + 1).GetType() == NativeMethods.SQLDMO_KEY_TYPE.SQLDMOKey_Primary)
{
primaryKey = keys.Item(i + 1);
break;
}
}
if (primaryKey != null)
{
// If there is a primary key, just add the column to the list of columns
}
else
{
// If there is no primary key, create new primary key and add thie column as the only column
primaryKey = (NativeMethods.IKey) new NativeMethods.Key();
primaryKey.SetType(NativeMethods.SQLDMO_KEY_TYPE.SQLDMOKey_Primary);
primaryKey.GetKeyColumns().Add(columnInfo.Name);
table.dmoTable.GetKeys().Add(primaryKey);
}
}
// Read the data back out
columnInfo = new SqlColumnInformation(dmoColumn.GetInPrimaryKey(), dmoColumn.GetIdentity(), dmoColumn.GetName(), dmoColumn.GetDatatype(), dmoColumn.GetLength(), dmoColumn.GetNumericScale(), dmoColumn.GetNumericPrecision(), dmoColumn.GetAllowNulls(), dmoColumn.GetDRIDefault().GetText(), dmoColumn.GetIdentitySeed(), dmoColumn.GetIdentityIncrement(), dmoColumn.GetIsRowGuidCol());
SqlColumn column = new SqlColumn(columnInfo);
// Set internal properties
column.dmoColumn = dmoColumn;
column.table = this.table;
// Add to private list
columns.Add(column);
return(column);
}
internal SqlColumn(SqlColumnInformation columnInfo)
{
this.columnInfo = columnInfo;
cachedName = columnInfo.Name;
}
