C#Transfrom

代码如下：

     private void btnConvertType_Click(object sender, EventArgs e)
        {
            if (rdo_btn_ConvertObject.Checked)//如果选择转换为object类型
            {
                using(FileStream filestram = new FileStream(@"d:\log.txt",System.IO.FileMode.Create))//创建文件文件流对象
                {
                    object _object = filestram as object;//使用as关键字转换类型
                    if(_object != null)//判断转化是否成功
                        MessageBox.Show("转换为Object成功","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
                    else
                        MessageBox.Show("转换为Object未成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
            if (rdo_btn_ConvertStream.Checked)//如果选择转换为Stream类型
            {
                using(FileStream filestream = new FileStream(@"d:\log.txt",System.IO.FileMode.Create))//创建文件流对象
                {
                    object _object = filestream;
                    Stream _stream = _object as Stream;//使用as关键字转换类型
                    if (_stream != null)
                        MessageBox.Show("转换为Stream成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    else
                        MessageBox.Show("转换为Stream未成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
            if (rdo_btn_ConvertString.Checked)//如果选择转换为string类型
            {
                using (FileStream filestream = new FileStream(@"d:\log.txt",System.IO.FileMode.Create))//创建文件流
                {
                    object _object = filestream;
                    string _string = _object as string;
                    if (_string != null)
                        MessageBox.Show("转换为String成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    else
                        MessageBox.Show("转换为String未成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
        }