地图浏览：(放大缩小平移全图)
//全局变量
public enum enumToolFlag
{
None
ZoomOut,
ZoomIn,
Pan,
}
enumToolFlag flag = enumToolFlag.None;
添加按钮事件函数并编辑
private void btnZoomIn_Click(object sender, EventArgs e) //放大
{
axMapControlMain.MousePointer= esriControlsMousePointer.esriPointerZoomIn;
flag = enumToolFlag.ZoomIn;
}
private void btnZoomOut_Click(object sender, EventArgs e) //缩小
{
axMapControlMain.MousePointer= esriControlsMousePointer.esriPointerZoomOut;
flag = enumToolFlag.ZoomOut;
}
private void btnPan_Click(object sender, EventArgs e) //平移
{
axMapControlMain.MousePointer= esriControlsMousePointer.esriPointerPan;
flag = enumToolFlag.Pan;
}
在axMapControl1_OnMouseDown中添加下列代码：
(下列代码中的axMapControlMain 为默认的axMapControl1)
IEnvelope ipEnv;
if (e.button == 1)
{
switch (flag)
{
case enumToolFlag.ZoomOut: //ZoomOut
{
ipEnv = axMapControlMain.TrackRectangle();
ipEnv = axMapControlMain.Extent;
ipEnv.Expand(2, 2, true);
axMapControlMain.Extent = ipEnv;
}
break;
case enumToolFlag.ZoomIn: //ZoomIn
{
ipEnv = axMapControlMain.TrackRectangle();
ipEnv = axMapControlMain.Extent;
ipEnv.Expand(0.5, 0.5, true);
axMapControlMain.Extent = ipEnv;
}
break;
case enumToolFlag.Pan: //Pan
{
axMapControlMain.Pan();
}
break;
}
全图： （代码如下）
private void btnFullExtent_Click(object sender, EventArgs e)
{
axMapControlMain.Extent = axMapControlMain.FullExtent;
}