void ReadJSONField(Newtonsoft.Json.Linq.JToken properties, XLayer layer)
{
if (properties != null)
{
foreach (Newtonsoft.Json.Linq.JProperty fa in properties)
{
//Newtonsoft.Json.Linq.JProperty fieldname = (Newtonsoft.Json.Linq.JProperty)fa.ElementAt(0);
//var fieldname = (string)fa.ElementAt(0);
string name = fa.Name;
XField newfield = new XField(typeof(String), name);
if (!(layer.Fields.Contains(newfield)))//图层若不存在该field则加入该field
{
layer.Fields.Add(newfield);
}
}
}
}
private void AddField_Click(object sender, EventArgs e)
{
string fieldname = textBox_add.Text;
XField addfield = new XField(Type.GetType("System.String"), fieldname);//默认为string类型
layer.Fields.Add(addfield);
//增加layer每个feature要素对应需要增加字段的值
int atrlength = layer.Features[0].Attribute.Values.Count;
foreach (XFeature feature in layer.Features)
{
if (feature.Attribute.Values.Count != atrlength)
{
continue; //如果已经修改过feature的属性则继续下一个层循环
}
feature.Attribute.Values.Add(null); //增加对应字段的属性值 初始为null
}
FormAttribute form = new FormAttribute(layer);
form.Show();
MessageBox.Show(fieldname + " is successfully added into the layer's field");
}
public void AddField(XField field)
{
}