c#数据类型转换？

Question

try{Convert.ToInt16(TextBox7.Text.ToString());}
catch(Exception e){MessageBox.ShowDialog(e.Message);}

Answer 1

这样的语句中怎么加try语句呢myCMD.Parameters["@所在楼层"].Value=Convert.ToInt16(TextBox7.Text.ToString());

Answer 2

myCMD.Parameters["@所在楼层"].Value=Convert.ToInt16(TextBox7.Text.ToString());
改为:
int txt7;
try
{
    txt7=Convert.ToInt16(TextBox7.Text.ToString());
    myCMD.Parameters["@所在楼层"].Value=txt7;
}
catch(Exception)
{
     //windows form:MessageBox.Show("Wrong Char");
     //Web Form:Response.Write("<script>alert('Wrong Char');</script>");
}

Answer 3

if(null!=TextBox7.Text)
Convert.ToInt16(TextBox7.Text.ToString());