MITab是采用C++编写的动态库，可以在各种开发工具中调用。在.NET中，MiApi.cs和MiWrapper.cs文件封装了C#调用MITab的接口。
示例代码如下：
///**********************************************************************
// * $Id: mitab_csharp_test.cs,v 1.2 2003/09/09 21:22:41 dmorissette Exp $
// *
// * Name: mitab_csharp_test.cs
// * Project: MapInfo TAB Read/Write library
// * Language: C#
// * Purpose: Test mainline for MITAB C API in Visual Basic
// * Author: Bo Thomsen, bvt@geocon.dk
// *
// **********************************************************************
// * Copyright (c) 2002, Bo Thomsen
// *
// * Permission is hereby granted, free of charge, to any person obtaining a
// * copy of this software and associated documentation files (the "Software"),
// * to deal in the Software without restriction, including without limitation
// * the rights to use, copy, modify, merge, publish, distribute, sublicense,
// * and/or sell copies of the Software, and to permit persons to whom the
// * Software is furnished to do so, subject to the following conditions:
// *
// * The above copyright notice and this permission notice shall be included
// * in all copies or substantial portions of the Software.
// *
// * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// * DEALINGS IN THE SOFTWARE.
// **********************************************************************
// *
// * $Log: mitab_csharp_test.cs,v $
// * Revision 1.2 2003/09/09 21:22:41 dmorissette
// * Update from BVT to work with version 1.2.4
// *
// * Revision 1.1 2002/09/07 17:58:01 daniel
// * Initial revision (from BVT)
// *
// * Revision 1.0 2002/09/07 14:53:59 bvt
// * translation of mitabc_test.c to CSharp
// *
// */
///************************************************************************/
///* testReportFile */
///************************************************************************/
public void testReportfile()
{
ReportFile("c:\\temp\\testtab.tab", "c:\\temp\\testtab.txt");
}
///************************************************************************/
///* ReportFile */
///************************************************************************/
public void ReportFile(string pszFilename, string pszReportname)
{
long dataset = 0;
long feature_id = 0;
long num_fields = 0;
long feature = 0;
long feature_type = 0;
long num_parts = 0;
long partno = 0;
long pointno = 0;
long fieldno = 0;
long num_points = 0;
double dX = 0;
double dY = 0;
string sTmp = null;
string sTmp2 = null;
long i1 = 0;
long i2 = 0;
dataset = mitab_c_open(pszFilename);
if (dataset == 0)
{
sTmp = new string(' ', 255);
i1 = mitab_c_getlasterrormsg_vb(sTmp, 255);
MessageBox.Show("mitab_c_open: " + pszFilename + " failed." + Environment.NewLine + sTmp.Substring(0, i1));
return;
}
sTmp = new string(' ', 255);
i1 = mitab_c_get_mif_coordsys_vb(dataset, sTmp, 255);
Print #1, "Coodsys Clause: "; sTmp.Substring(0, i1);
num_fields = mitab_c_get_field_count(dataset);
feature_id = mitab_c_next_feature_id(dataset, -1);
while (feature_id != -1)
{
///* -------------------------------------------------------------------- */
///* Read next feature object */
///* -------------------------------------------------------------------- */
feature = mitab_c_read_feature(dataset, feature_id);
if (feature == 0)
{
sTmp = new string(' ', 255);
i1 = mitab_c_getlasterrormsg_vb(sTmp, 255);
MessageBox.Show("Failed to read feature " + Str$(feature_id) + Environment.NewLine + sTmp.Substring(0, i1));
return;
}
feature_type = mitab_c_get_type(feature);
num_parts = mitab_c_get_parts(feature);
Print #1, "";
Print #1, "Read feature " + Str$(feature_id) + ": type=" + Str$(feature_type) + ", num_parts=" + Str$(num_parts);
///* -------------------------------------------------------------------- */
///* Dump the feature attributes... */
///* -------------------------------------------------------------------- */
for (fieldno = 0; fieldno < num_fields; fieldno++)
{
sTmp = new string(' ', 255);
i1 = mitab_c_get_field_name_vb(dataset, fieldno, sTmp, 255);
sTmp2 = new string(' ', 255);
i2 = mitab_c_get_field_as_string_vb(feature, fieldno, sTmp2, 255);
Print #1, " " + sTmp.Substring(0, i1) + "=" + sTmp2.Substring(0, i2);
}
///* -------------------------------------------------------------------- */
///* ... and coordinates. */
///* In real applications, we would probably want to handle each */
///* object type differently but we won't do it here. */
///* -------------------------------------------------------------------- */
for (partno = 0; partno < num_parts; partno++)
{
Print #1, " Part no " + Str$(partno + 1);
num_points = mitab_c_get_vertex_count(feature, partno);
for (pointno = 0; pointno < num_points; pointno++)
{
dX = mitab_c_get_vertex_x(feature, partno, pointno);
dY = mitab_c_get_vertex_y(feature, partno, pointno);
Print #1, " "; dX; dY;
}
}
mitab_c_destroy_feature (feature);
feature_id = mitab_c_next_feature_id(dataset, feature_id);
}
mitab_c_close (dataset);
if (mitab_c_getlasterrorno() != 0)
{
sTmp = new string(' ', 255);
i1 = mitab_c_getlasterrormsg_vb(sTmp, 255);
MsgBox "Last Error: " + sTmp.Substring(0, i1);
}
}
///************************************************************************/
///* CopyFile() */
///************************************************************************/
public void CopyFile(string pszSource, string pszDest)
{
MessageBox.Show("Copy File not implemented at this time.");
}
///************************************************************************/
///* testWriteFile */
///************************************************************************/
public void testWritefile()
{
WriteFile("c:\\temp\\testtab.tab", "tab");
}
///************************************************************************/
///* WriteFile() */
///************************************************************************/
public void WriteFile(string pszDest, string pszMifOrTab)
{
long dataset = 0;
long feature = 0;
double[] x = new double[100];
double[] y = new double[100];
long field_index = 0;
string sTmp = null;
long i1 = 0;
long i2 = 0;
dataset = mitab_c_create(pszDest, pszMifOrTab, "CoordSys Earth Projection 1, 0", 90, 0, 180, -180);
if (dataset == 0)
{
sTmp = new string(' ', 255);
i1 = mitab_c_getlasterrormsg_vb(sTmp, 255);
MessageBox.Show("Failed to create " + pszMifOrTab + " file: " + pszDest + Environment.NewLine + sTmp.Substring(0, i1));
return;
}
///* -------------------------------------------------------------------- */
///* Add a text, float and integer field. */
///* -------------------------------------------------------------------- */
field_index = mitab_c_add_field(dataset, "TestInt", TABFT_Integer, 8, 0, 0, 0);
field_index = mitab_c_add_field(dataset, "TestFloat", TABFT_Float, 12, 2, 0, 0);
field_index = mitab_c_add_field(dataset, "TestString", TABFT_Char, 10, 0, 0, 0);
///* -------------------------------------------------------------------- */
///* Write a point. */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Point);
x[0] = 98;
y[0] = 50;
mitab_c_set_points(feature, 0, 1, x[0], y[0]);
i1 = 256;
i2 = 255;
i1 = i1 * i2;
mitab_c_set_symbol(feature, 41, 15, i1);
mitab_c_set_field(feature, 0, "100");
mitab_c_set_field(feature, 1, "100.5");
mitab_c_set_field(feature, 2, "12345678901234567890");
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write a MultiPoint. */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_MultiPoint);
x[0] = 90;
y[0] = 51;
x[1] = 90.5;
y[1] = 51.5;
x[2] = 91;
y[2] = 52;
mitab_c_set_points(feature, 0, 3, x[0], y[0]);
i1 = 256;
i2 = 255;
i1 = i1 * i2;
mitab_c_set_symbol(feature, 41, 15, i1);
mitab_c_set_field(feature, 0, "100");
mitab_c_set_field(feature, 1, "100.5");
mitab_c_set_field(feature, 2, "12345678901234567890");
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write a line. */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Polyline);
x[0] = 100;
y[0] = 49;
x[1] = 101;
y[1] = 48;
mitab_c_set_points(feature, 0, 2, x[0], y[0]);
mitab_c_set_pen(feature, 1, 2, 255);
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write text. */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Text);
x[0] = 101;
y[0] = 51;
mitab_c_set_points(feature, 0, 1, x[0], y[0]);
mitab_c_set_text(feature, "My text");
mitab_c_set_font(feature, "Arial");
mitab_c_set_text_display(feature, 45, 1, 7, 255 * 65536, 0, -1, -1, -1);
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write region (polygon). */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Region);
x[0] = 101;
y[0] = 51;
x[1] = 100;
y[1] = 51;
x[2] = 100;
y[2] = 50;
x[3] = 101;
y[3] = 50;
x[4] = 101;
y[4] = 51;
mitab_c_set_points(feature, 0, 5, x[0], y[0]);
x[0] = 100.5;
y[0] = 50.5;
x[1] = 100.5;
y[1] = 50.7;
x[2] = 100.7;
y[2] = 50.7;
x[3] = 100.7;
y[3] = 50.5;
x[4] = 100.5;
y[4] = 50.5;
mitab_c_set_points(feature, 1, 5, x[0], y[0]);
mitab_c_set_brush(feature, 255, 0, 2, 0);
mitab_c_set_pen(feature, 1, 2, 65535);
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write a second region with two polygon (polygon). */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Region);
x[0] = 101;
y[0] = 41;
x[1] = 100;
y[1] = 41;
x[2] = 100;
y[2] = 40;
x[3] = 101;
y[3] = 40;
x[4] = 101;
y[4] = 41;
mitab_c_set_points(feature, 0, 5, x[0], y[0]);
x[0] = 100.5;
y[0] = 40.5;
x[1] = 100.5;
y[1] = 40.7;
x[2] = 100.7;
y[2] = 40.7;
x[3] = 100.7;
y[3] = 40.5;
x[4] = 100.5;
y[4] = 40.5;
mitab_c_set_points(feature, 1, 5, x[0], y[0]);
x[0] = 100.2;
y[0] = 40.2;
x[1] = 100.2;
y[1] = 40.4;
x[2] = 100.4;
y[2] = 40.4;
x[3] = 100.4;
y[3] = 40.2;
x[4] = 100.2;
y[4] = 40.2;
mitab_c_set_points(feature, 2, 5, x[0], y[0]);
x[0] = 96;
y[0] = 46;
x[1] = 95;
y[1] = 46;
x[2] = 95;
y[2] = 45;
x[3] = 96;
y[3] = 45;
x[4] = 96;
y[4] = 46;
mitab_c_set_points(feature, 0, 5, x[0], y[0]);
x[0] = 95.5;
y[0] = 45.5;
x[1] = 95.5;
y[1] = 45.7;
x[2] = 95.7;
y[2] = 45.7;
x[3] = 95.7;
y[3] = 45.5;
x[4] = 95.5;
y[4] = 45.5;
mitab_c_set_points(feature, 4, 5, x[0], y[0]);
mitab_c_set_brush(feature, 255, 0, 2, 0);
mitab_c_set_pen(feature, 1, 2, 65535);
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write multiple polyline (3 parts). */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Polyline);
x[0] = 111;
y[0] = 57;
x[1] = 110;
y[1] = 57;
x[2] = 110;
y[2] = 56;
mitab_c_set_points(feature, 0, 3, x[0], y[0]);
x[0] = 108;
y[0] = 56;
x[1] = 109;
y[1] = 57;
mitab_c_set_points(feature, 1, 2, x[0], y[0]);
x[0] = 105;
y[0] = 55;
x[1] = 105;
y[1] = 57;
x[2] = 107;
y[2] = 57;
x[3] = 107;
y[3] = 55;
mitab_c_set_points(feature, 2, 4, x[0], y[0]);
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write an arc */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Arc);
mitab_c_set_arc(feature, 70, 75, 10, 5, 45, 270);
mitab_c_set_field(feature, 0, "123");
mitab_c_set_field(feature, 1, "456");
mitab_c_set_field(feature, 2, "12345678901234567890");
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write an ellipse */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Ellipse);
mitab_c_set_arc(feature, 70, 75, 10, 5, 0, 0);
mitab_c_set_field(feature, 0, "1");
mitab_c_set_field(feature, 1, "2");
mitab_c_set_field(feature, 2, "3");
mitab_c_set_brush(feature, 255, 0, 2, 0);
mitab_c_set_pen(feature, 1, 2, 65535);
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Write rectangle. */
///* The MBR of the array of points will be used for the */
///* rectangle corners. */
///* -------------------------------------------------------------------- */
feature = mitab_c_create_feature(dataset, TABFC_Rectangle);
x[0] = 91;
y[0] = 61;
x[1] = 90;
y[1] = 61;
x[2] = 90;
y[2] = 60;
x[3] = 91;
y[3] = 60;
x[4] = 91;
y[4] = 61;
mitab_c_set_points(feature, 0, 5, x[0], y[0]);
mitab_c_set_brush(feature, 255, 0, 2, 0);
mitab_c_set_pen(feature, 1, 2, 65535);
mitab_c_write_feature(dataset, feature);
mitab_c_destroy_feature(feature);
///* -------------------------------------------------------------------- */
///* Cleanup */
///* -------------------------------------------------------------------- */
mitab_c_close (dataset);
if (mitab_c_getlasterrorno() != 0)
{
sTmp = new string(' ', 255);
i1 = mitab_c_getlasterrormsg_vb(sTmp, 255);
MsgBox "Last Error: " + sTmp.Substring(0, i1);
}
}