ArcGIS Engine自定义控件显示字段（Field）

因为课题的缘故，翻出了以前写的一个ArcGIS Engine的例子，是在下拉框中显示一个图层的属性字段，当时把它做成了一个自定义控件，因为在开发UI的时候需要反复用到这个功能。做成之后要显示并返回选中图层的属性字段十分方便。

传入：IFeatureClass图层；传出：IField属性字段

最近仿照这个例子写了在下拉框中显示一个地图（IMap）满足过滤要求的图层（IFeatureClass或IRasterLayer）的自定义控件，功能比上面这个强大了些，可以做到基本的类型判断和通过OpenFileDialog对话框加载图层，以后有时间了再发布。

 

public partial class FieldsListCtrl : UserControl
{

    #region class member
    private IFeatureClass featureclass;
    private IField selected_field = null;

    #endregion

    public FieldsListCtrl()
    {
        InitializeComponent();
    }


    public IFeatureClass FeatureClass
    {
        get { return featureclass; }
        set
        {
            featureclass = value;
            if (null == featureclass)
            {
                return;
            }

            PopulateCombo();
        }
    }

    public IField Selected_Filed
    {
        get { return selected_field; }
        set { selected_field = value; }
    }


    /// <summary>
    /// 在下拉框中显示除OBJECT和Shape之外的字段名
    /// </summary>
    private void PopulateCombo()
    {
        if (null == featureclass)
        {
            return;
        }

        cmbFieldList.Items.Clear();

        IFields pFields = featureclass.Fields;

        for (int i = 2; i < pFields.FieldCount; i++)
        {
            cmbFieldList.Items.Add(pFields.get_Field(i).AliasName);
        }

    }

    private void cmbFieldList_SelectedIndexChanged(object sender, EventArgs e)
    {
        IFields pFields = featureclass.Fields;

        for (int i = 2; i < pFields.FieldCount; i++)
        {
            if (cmbFieldList.SelectedItem.ToString() == pFields.get_Field(i).AliasName)
            {
                selected_field = pFields.get_Field(i);
            }
        }
    }
}