ArcEngine关于单位转换示例

示例界面：

转换代码：

     private void Button1_Click(object sender, System.Windows.RoutedEventArgs e)
         {
             // Get the AreaUnits value string name.
             string theSelectionText = ComboBox1.SelectedValue.ToString();

             // Get the input Square Meters value.
             double theInputValue = System.Convert.ToDouble(TextBox_Input_1.Text);

             // Create a placeholder output AreaUnits output value from the .ConvertFromSquareMeters Method.
             double theOutputValue = ;

             // For each AreaUnits type perform the .ConvertFromSquareMeters calculation.
             if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.Acres.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.Acres.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.Ares.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.Ares.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.Hectares.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.Hectares.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareCentimeters.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.SquareCentimeters.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareDecimeters.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.SquareDecimeters.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareFeet.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.SquareFeet.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareInches.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.SquareInches.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareKilometers.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.SquareKilometers.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareMeters.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.SquareMeters.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareMiles.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.SquareMiles.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareMillimeters.Name)
             {
                 theOutputValue = Esri.ArcGISRuntime.Geometry.AreaUnits.SquareMillimeters.ConvertFromSquareMeters(theInputValue);
             }
             else if (theSelectionText == Esri.ArcGISRuntime.Geometry.AreaUnits.SquareYards.Name)
             {
                 // NOTE: Using this long version you can also obtain information on the AreaUnit Class.
                 Esri.ArcGISRuntime.Geometry.AreaUnit myUnit_SquareYards = (Esri.ArcGISRuntime.Geometry.AreaUnit)Esri.ArcGISRuntime.Geometry.AreaUnit.Create(Esri.ArcGISRuntime.Geometry.AreaUnits.SquareYards.Id);
                 theOutputValue = myUnit_SquareYards.ConvertFromSquareMeters(theInputValue);

                 // Additional AreaUnit Properties that you could make use of in another application
                 int myAreaUnit_SquareYards_ID = myUnit_SquareYards.Id;
                 string myAreaUnit_SquareYards_Name = myUnit_SquareYards.Name;
                 Esri.ArcGISRuntime.Geometry.UnitType myAreaUnit_SquareYards_UnitType = myUnit_SquareYards.UnitType;
             }

             // Display the other XXXX AreaUnits values.
             TextBox_Output_1.Text = theOutputValue.ToString();
         }

参考网址：https://developers.arcgis.com/net/desktop/api-reference/