private void DeleteField_Click(object sender, EventArgs e)
{
string fieldname = textBox_del.Text;
for (int i = layer.Fields.Count - 1; i >= 0; i--)
{
if (layer.Fields[i].name == fieldname)
{
layer.Fields.Remove(layer.Fields[i]);
//删除layer每个feature要素对应被删字段的值
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.RemoveAt(i); //删除对应字段的属性值
}
//layer.Features[0].Attribute.deleteValue(i);
break;
}
}
FormAttribute form = new FormAttribute(layer);
form.Show();
MessageBox.Show(fieldname + " is successfully deleted from the layer's field");
}
private void ChangeFieldName_Click(object sender, EventArgs e)
{
string oldfieldname = textBox_oldField.Text;
string newfieldname = textBox_newField.Text;
for (int i = layer.Fields.Count - 1; i >= 0; i--)
{
if (layer.Fields[i].name == oldfieldname)
{
layer.Fields[i].name = newfieldname;
}
}
FormAttribute form = new FormAttribute(layer);
form.Show();
MessageBox.Show("field " + oldfieldname + " is successfully change to " + newfieldname);
}
private void Moveforward_Click(object sender, EventArgs e)
{
string fieldname = textBox_movefield.Text;
for (int i = layer.Fields.Count - 1; i >= 0; i--)
{
if (layer.Fields[i].name == fieldname)
{
int transfield = i - 1;
if (sender == moveforward)
{
transfield = i - 1;
}
else if (sender == moveback)
{
transfield = i + 1;
}
//交换字段名
string t = layer.Fields[i].name;
layer.Fields[i].name = layer.Fields[transfield].name;
layer.Fields[transfield].name = t;
Object attrpre = null;//layer.Features[0].Attribute.Values[i];
foreach (XFeature feature in layer.Features)
{
if (feature.Attribute.Values[i] != attrpre) //如果属性还未进行移动交换
{
Object to = feature.Attribute.Values[i];
feature.Attribute.Values[i] = feature.Attribute.Values[transfield];
feature.Attribute.Values[transfield] = to;
}
attrpre = feature.Attribute.Values[i];
}
break;//一定要跳出循环
}
}
FormAttribute form = new FormAttribute(layer);
form.Show();
}
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");
}
private void BOpenAttribute_Click(object sender, EventArgs e)
{
FormAttribute form = new FormAttribute(layer);
form.Show();
}