地图文档保存

问题:空文档也能保存
private void saveToolStrip_Click(object sender, EventArgs e)
{
try
{
string sMxdFileName = mainMapControl.DocumentFilename;
IMapDocument pMapDocument = new MapDocumentClass();
//检查文档是否为空以及有效性
if (sMxdFileName != null && mainMapControl.CheckMxFile(sMxdFileName))
{
if (pMapDocument.get_IsReadOnly(sMxdFileName))
{
MessageBox.Show("地图本当为只读,不能保存!");
pMapDocument.Close();
return;
}

else
{
SaveFileDialog pSaveFileDialog = new System.Windows.Forms.SaveFileDialog();
pSaveFileDialog.Title = "请选择保存路径";
pSaveFileDialog.Filter = "ArcMap文档(*.mxd)|*.mxd|ArcMap模板(*.mxt)|*.mxt";
//当相同的文件存在是提示错误
pSaveFileDialog.OverwritePrompt = true;
pSaveFileDialog.RestoreDirectory = true;
if (pSaveFileDialog.ShowDialog() == DialogResult.OK)
{
//获取名字
sMxdFileName = pSaveFileDialog.FileName;
}
else
{
return;
}
pMapDocument.New(sMxdFileName);
pMapDocument.ReplaceContents(mainMapControl.Map as IMxdContents);
//保存为绝对路径
pMapDocument.Save(pMapDocument.UsesRelativePaths, true);
pMapDocument.Close();
MessageBox.Show("保存文档成功");
}
}


}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

地图文档另存为1

private void saveAsToolStrip_Click(object sender, EventArgs e)
{
try
{
SaveFileDialog pSaveDialog = new System.Windows.Forms.SaveFileDialog();
pSaveDialog.Title = "另存为";
pSaveDialog.OverwritePrompt = true;//当相同的文件存在是提示错误
pSaveDialog.Filter = "ArcMap文档(*.mxd)|*.mxd|ArcMap模板(*.mxt)|*.mxt";
pSaveDialog.RestoreDirectory = true;
if (pSaveDialog.ShowDialog() == DialogResult.OK)
{
string sFilePath = pSaveDialog.FileName;
IMapDocument pMapDocument = new MapDocumentClass();
pMapDocument.New(sFilePath);
pMapDocument.ReplaceContents(mainMapControl.Map as IMxdContents);
pMapDocument.Save(true, true);
pMapDocument.Close();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

地图另存为2

ICommand command = new ControlsSaveAsDocCommandClass();
command.OnCreate(mainMapControl.Object);
command.OnClick();