c#的shp与text互转

在C#中，可以使用OGR库来实现shp与text之间的互转。首先，需要安装OGR库，可以通过NuGet包管理器来进行安装。

将shp转为text，可以使用以下代码：

using OSGeo.OGR;

// 打开shp文件
var driver = Ogr.GetDriverByName("ESRI Shapefile");
var dataSource = driver.Open("path/to/shapefile.shp", 0);

// 获取第一个图层
var layer = dataSource.GetLayerByIndex(0);

// 创建txt文件
var textDriver = Ogr.GetDriverByName("CSV");
var textDataSource = textDriver.CreateDataSource("path/to/textfile.txt", null);

// 创建新的图层
var textLayer = textDataSource.CreateLayer("layer_name", null, wkbGeometryType.wkbUnknown, null);

// 获取字段
var layerDef = layer.GetLayerDefn();
var fieldCount = layerDef.GetFieldCount();
for (int i = 0; i < fieldCount; i++)
{
    var fieldDef = layerDef.GetFieldDefn(i);
    var fieldName = fieldDef.GetName();
    var fieldType = fieldDef.GetFieldType();
    var fieldWidth = fieldDef.GetWidth();
    var fieldPrecision = fieldDef.GetPrecision();

    // 在新的图层中创建字段
    var textFieldDef = new FieldDefn(fieldName, fieldType);
    textLayer.CreateField(textFieldDef);
}

// 获取要素
var feature = layer.GetNextFeature();
while (feature != null)
{
    // 在新的图层中创建要素
    var textFeature = new Feature(textLayer.GetLayerDefn());
    for (int i = 0; i < fieldCount; i++)
    {
        var fieldValue = feature.GetFieldAsString(i);
        textFeature.SetField(i, fieldValue);
    }

    // 设置几何图形
    var geometry = feature.GetGeometryRef();
    if (geometry != null)
    {
        var textGeometry = geometry.Clone();
        textFeature.SetGeometry(textGeometry);
    }

    // 将要素写入文件中
    textLayer.CreateFeature(textFeature);

    // 获取下一个要素
    feature = layer.GetNextFeature();
}

// 关闭文件
dataSource.Dispose();
textDataSource.Dispose();

将text转为shp，可以使用以下代码：

using OSGeo.OGR;

// 打开txt文件
var driver = Ogr.GetDriverByName("CSV");
var dataSource = driver.Open("path/to/textfile.txt", 0);

// 获取第一个图层
var layer = dataSource.GetLayerByIndex(0);

// 创建shp文件
var shpDriver = Ogr.GetDriverByName("ESRI Shapefile");
var shpDataSource = shpDriver.CreateDataSource("path/to/shapefile.shp", null);

// 创建新的图层
var shpLayer = shpDataSource.CreateLayer("layer_name", null, wkbGeometryType.wkbUnknown, null);

// 获取字段
var layerDef = layer.GetLayerDefn();
var fieldCount = layerDef.GetFieldCount();
for (int i = 0; i < fieldCount; i++)
{
    var fieldDef = layerDef.GetFieldDefn(i);
    var fieldName = fieldDef.GetName();
    var fieldType = fieldDef.GetFieldType();
    var fieldWidth = fieldDef.GetWidth();
    var fieldPrecision = fieldDef.GetPrecision();

    // 在新的图层中创建字段
    var shpFieldDef = new FieldDefn(fieldName, fieldType);
    shpLayer.CreateField(shpFieldDef);
}

// 获取要素
var feature = layer.GetNextFeature();
while (feature != null)
{
    // 在新的图层中创建要素
    var shpFeature = new Feature(shpLayer.GetLayerDefn());
    for (int i = 0; i < fieldCount; i++)
    {
        var fieldValue = feature.GetFieldAsString(i);
        shpFeature.SetField(i, fieldValue);
    }

    // 设置几何图形
    var geometry = feature.GetGeometryRef();
    if (geometry != null)
    {
        var shpGeometry = geometry.Clone();
        shpFeature.SetGeometry(shpGeometry);
    }

    // 将要素写入文件中
    shpLayer.CreateFeature(shpFeature);

    // 获取下一个要素
    feature = layer.GetNextFeature();
}

// 关闭文件
dataSource.Dispose();
shpDataSource.Dispose();