private void btnCompute_Click(object sender, EventArgs e)
{
ProgressDialog pd = null;
try
{
ItemClass item = this.comboBox1.SelectedItem as ItemClass;
if (item == null)
{
MessageBox.Show("请先选择要计算的图层", "提示");
return;
}
ItemClass fd_item = this.comboBox2.SelectedItem as ItemClass;
if (fd_item == null)
{
MessageBox.Show("请先选择要计算的字段", "提示");
return;
}
ILayer layer = item.Value as ILayer;
IFeatureLayer featLayer = layer as IFeatureLayer;
IFeatureClass fc = featLayer.FeatureClass;
//
string fdName = fd_item.Caption;
//
int fCount = fc.FeatureCount(null);
if (fCount > 0)
{
IFeatureCursor pcursor = fc.Update(null, false);
IFeature pf = pcursor.NextFeature();
int index = fc.FindField(fdName);
pd = new ProgressDialog();
pd.Text = "进度";
pd.Message = "计算字段图形面积中......";
pd.Minimum = 0;
pd.Maximum = fCount;
pd.Show(this);
//
Application.DoEvents();
double t_area = 0.0;
int n = 0;
while (pf != null)
{
n = n + 1;
if (n % 200 == 0)
{
pd.Value = n;
pd.Message = "计算字段图形面积中......" + pd.Value.ToString() + "/" + pd.Maximum.ToString();
Application.DoEvents();
pcursor.Flush();
}
IArea area = (pf.Shape as IArea);
if (area != null)
{
t_area = area.Area;
pf.set_Value(index, t_area);
//
pcursor.UpdateFeature(pf);
}
//
pf = pcursor.NextFeature();
}
pcursor.Flush();
if (pcursor != null)
{
TokayWorkspace.ComRelease(pcursor);
pcursor = null;
}
if (pd != null)
{
pd.Dispose();
pd = null;
}
MessageBox.Show("计算完毕！", "提示");
}
}
catch (Exception ee)
{
MessageBox.Show(ee.StackTrace, "提示");
}
finally
{
if (pd != null)
{
pd.Dispose();
pd = null;
}
}
}
private void btnUpdate_Click(object sender, EventArgs e)
{
ProgressDialog pd = null;
try
{
ItemClass item = this.comboBox1.SelectedItem as ItemClass;
if (item == null)
{
MessageBox.Show("请先选择要更新的图层", "提示");
return;
}
ItemClass fd_item = this.comboBox2.SelectedItem as ItemClass;
if (fd_item == null)
{
MessageBox.Show("请先选择要更新的字段", "提示");
return;
}
ItemClass fd_from = this.comboBox3.SelectedItem as ItemClass;
if (fd_from == null)
{
MessageBox.Show("请先选择值来源的字段", "提示");
return;
}
int index_from = CommonClass.TInt(this.fd_indexFrom.Value);
int index_to = CommonClass.TInt(this.fd_indexTo.Value);
if (index_from < 0)
{
MessageBox.Show("取子字符串只能从大于等于0开始！", "提示");
return;
}
//
ILayer layer = item.Value as ILayer;
IFeatureLayer featLayer = layer as IFeatureLayer;
IFeatureClass fc = featLayer.FeatureClass;
//
string fdName = fd_item.Caption;
string fdfromName = fd_from.Caption;
//
int fCount = fc.FeatureCount(null);
if (fCount > 0)
{
pd = new ProgressDialog();
pd.Text = "进度";
pd.Message = "计算扣除地类系数中......";
pd.Minimum = 0;
pd.Maximum = fCount;
pd.Show(this);
//
Application.DoEvents();
//
IFeatureCursor pcursor = fc.Update(null, false);
IFeature pf = pcursor.NextFeature();
int index = fc.FindField(fdfromName);
int indexUpdate = fc.FindField(fdName);
//
int n = 0;
while (pf != null)
{
n = n + 1;
if (n % 200 == 0)
{
pd.Value = n;
pd.Message = "取子字符串中......" + pd.Value.ToString() + "/" + pd.Maximum.ToString();
Application.DoEvents();
pcursor.Flush();
}
object v = pf.get_Value(index);
if (v != null)
{
string value_from = v.ToString();
string result_v = value_from;
if (index_to < value_from.Length)
{
result_v = value_from.Substring(index_from, index_to);
}
else
{
result_v = value_from.Substring(index_from);
}
//
pf.set_Value(indexUpdate, result_v);
pcursor.UpdateFeature(pf);
}
pf = pcursor.NextFeature();
}
pcursor.Flush();
if (pcursor != null)
{
TokayWorkspace.ComRelease(pcursor);
pcursor = null;
}
if (pd != null)
{
pd.Dispose();
pd = null;
}
MessageBox.Show("更新完毕！", "提示");
}
}
catch (Exception ee)
{
MessageBox.Show(ee.StackTrace, "提示");
}
finally
{
if (pd != null)
{
pd.Dispose();
pd = null;
}
}
}