/// <summary>
/// Returns a datarow based on an object id (OID).
/// </summary>
/// <param name="oid"></param>
/// <returns>datarow</returns>
public SharpMap.Data.FeatureDataRow <uint> GetFeature(uint oid)
{
using (SqlConnection conn = new SqlConnection(_ConnectionString))
{
string strSQL = "SELECT *, " + this.GeometryColumn + " AS sharpmap_tempgeometry FROM " + this.Table + " WHERE " + this.ObjectIdColumn + "='" + oid.ToString() + "'";
using (SqlDataAdapter adapter = new SqlDataAdapter(strSQL, conn))
{
DataSet ds = new DataSet();
conn.Open();
adapter.Fill(ds);
conn.Close();
if (ds.Tables.Count > 0)
{
FeatureDataTable <uint> fdt = new FeatureDataTable <uint>(ds.Tables[0], "OID");
foreach (System.Data.DataColumn col in ds.Tables[0].Columns)
{
if (col.ColumnName != this.GeometryColumn && col.ColumnName != "sharpmap_tempgeometry" && !col.ColumnName.StartsWith("Envelope_"))
{
fdt.Columns.Add(col.ColumnName, col.DataType, col.Expression);
}
}
if (ds.Tables[0].Rows.Count > 0)
{
System.Data.DataRow dr = ds.Tables[0].Rows[0];
SharpMap.Data.FeatureDataRow <uint> fdr = fdt.NewRow(oid);
foreach (System.Data.DataColumn col in ds.Tables[0].Columns)
{
if (col.ColumnName != this.GeometryColumn && col.ColumnName != "sharpmap_tempgeometry" &&
!col.ColumnName.StartsWith("Envelope_") && String.Compare(col.ColumnName, "oid", StringComparison.CurrentCultureIgnoreCase) != 0)
{
fdr[col.ColumnName] = dr[col];
}
}
if (dr["sharpmap_tempgeometry"] != DBNull.Value)
{
fdr.Geometry = SharpMap.Converters.WellKnownBinary.GeometryFromWKB.Parse((byte[])dr["sharpmap_tempgeometry"]);
}
return(fdr);
}
else
{
return(null);
}
}
else
{
return(null);
}
}
}
}
/// <summary>
/// Creates a new table in a Microsoft SQL Server database and copies rows from an existing datasource.
/// </summary>
/// <remarks>
/// <para>The datatable created will contain six extra columns besides the attribute data: "OID" (Object ID row),
/// "WKB_Geometry" (Geometry stored as WKB), and Envelope_MinX, Envelope_MinY, Envelope_MaxX, Envelope_MaxY
/// for geometry bounding box.</para>
/// <para>
/// <example>
/// Upload a ShapeFile to a database:
/// <code>
/// public void CreateDatabase(string shapeFile)
/// {
/// if (!System.IO.File.Exists(shapeFile))
/// {
/// MessageBox.Show("File not found");
/// return;
/// }
/// ShapeFile shp = new ShapeFile(shapeFile, false);
/// //Create tablename from filename
/// string tablename = shapeFile.Substring(shapeFile.LastIndexOf('\\') + 1,
/// shapeFile.LastIndexOf('.') - shapeFile.LastIndexOf('\\') - 1);
/// //Create connectionstring
/// string connstr = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|GeoDatabase.mdf;Integrated Security=True;User Instance=True";
/// int count = SharpMap.Data.Providers.MsSql.CreateDataTable(shp, tablename, connstr);
/// MessageBox.Show("Uploaded " + count.ToString() + " features to datatable '" + tablename + "'");
/// }
/// </code>
/// </example>
/// </para>
/// </remarks>
/// <param name="datasource">Datasource to upload</param>
/// <param name="tablename">Name of table to create (existing table will be overwritten!)</param>
/// <param name="connstr">Connection string to database</param>
/// <returns>Number or rows inserted, -1 if failed and 0 if table created but no rows inserted.</returns>
public static int CreateDataTable(SharpMap.Data.Providers.IProvider <uint> datasource, string tablename, string connstr)
{
datasource.Open();
FeatureDataRow geom = datasource.GetFeature(0);
DataColumnCollection columns = geom.Table.Columns;
int counter = -1;
using (SqlConnection conn = new SqlConnection(connstr))
{
SqlCommand command = new SqlCommand();
command.Connection = conn;
conn.Open();
//Try to drop table if it exists
try
{
command.CommandText = "DROP TABLE \"" + tablename + "\";";
command.ExecuteNonQuery();
}
catch { }
//Create new table for storing the datasource
string sql = "CREATE TABLE " + tablename + " (oid INTEGER IDENTITY PRIMARY KEY, WKB_Geometry Image, " +
"Envelope_MinX real, Envelope_MinY real, Envelope_MaxX real, Envelope_MaxY real";
foreach (DataColumn col in columns)
{
if (col.DataType != typeof(String))
{
sql += ", " + col.ColumnName + " " + Type2SqlType(col.DataType).ToString();
}
else
{
sql += ", " + col.ColumnName + " VARCHAR(256)";
}
}
command.CommandText = sql + ");";
command.ExecuteNonQuery();
counter++;
ReadOnlyCollection <uint> indexes = datasource.GetObjectIdsInView(datasource.GetExtents());
//Select all indexes in shapefile, loop through each feature and insert them one-by-one
foreach (uint idx in indexes)
{
//Get feature from shapefile
SharpMap.Data.FeatureDataRow <uint> feature = datasource.GetFeature(idx);
if (counter == 0)
{
//Create insert script
string strSQL = " (";
foreach (DataColumn col in feature.Table.Columns)
{
strSQL += "@" + col.ColumnName + ",";
}
strSQL += "@WKB_Geometry,@Envelope_MinX,@Envelope_MinY, " +
"@Envelope_MaxX,@Envelope_MaxY)";
strSQL = "INSERT INTO " + tablename + strSQL.Replace("@", "") + " VALUES" + strSQL;
command.CommandText = strSQL;
command.Parameters.Clear();
//Add datacolumn parameters
foreach (DataColumn col in feature.Table.Columns)
{
command.Parameters.Add("@" + col.ColumnName, Type2SqlType(col.DataType));
}
//Add geometry parameters
command.Parameters.Add("@WKB_Geometry", SqlDbType.VarBinary);
command.Parameters.Add("@Envelope_MinX", SqlDbType.Real);
command.Parameters.Add("@Envelope_MinY", SqlDbType.Real);
command.Parameters.Add("@Envelope_MaxX", SqlDbType.Real);
command.Parameters.Add("@Envelope_MaxY", SqlDbType.Real);
}
//Set values
foreach (DataColumn col in feature.Table.Columns)
{
command.Parameters["@" + col.ColumnName].Value = feature[col];
}
if (feature.Geometry != null)
{
command.Parameters["@WKB_Geometry"].Value = feature.Geometry.AsBinary(); //Add the geometry as Well-Known Binary
SharpMap.Geometries.BoundingBox box = feature.Geometry.GetBoundingBox();
command.Parameters["@Envelope_MinX"].Value = box.Left;
command.Parameters["@Envelope_MinY"].Value = box.Bottom;
command.Parameters["@Envelope_MaxX"].Value = box.Right;
command.Parameters["@Envelope_MaxY"].Value = box.Top;
}
else
{
command.Parameters["@WKB_Geometry"].Value = DBNull.Value;
command.Parameters["@Envelope_MinX"].Value = DBNull.Value;
command.Parameters["@Envelope_MinY"].Value = DBNull.Value;
command.Parameters["@Envelope_MaxX"].Value = DBNull.Value;
command.Parameters["@Envelope_MaxY"].Value = DBNull.Value;
}
//Insert row
command.ExecuteNonQuery();
counter++;
}
//Create indexes
command.Parameters.Clear();
command.CommandText = "CREATE INDEX [IDX_Envelope_MinX] ON " + tablename + " (Envelope_MinX)";
command.ExecuteNonQuery();
command.CommandText = "CREATE INDEX [IDX_Envelope_MinY] ON " + tablename + " (Envelope_MinY)";
command.ExecuteNonQuery();
command.CommandText = "CREATE INDEX [IDX_Envelope_MaxX] ON " + tablename + " (Envelope_MaxX)";
command.ExecuteNonQuery();
command.CommandText = "CREATE INDEX [IDX_Envelope_MaxY] ON " + tablename + " (Envelope_MaxY)";
command.ExecuteNonQuery();
conn.Close();
}
datasource.Close();
return(counter);
}
