程序里面只能执行字符串
string str;
str="Select mAmount From GreaseAmount Where RobotType="+textBox1.Text+" And ServoTime="+textBox2.Text;
exec.str;
string str;
str="Select mAmount From GreaseAmount Where RobotType="+textBox1.Text+" And ServoTime="+textBox2.Text;
exec.str;
然后把select得出的值赋给textBox3.text怎么写呢?
如果数据类型是字符串格式,注意添加'
str="Select mAmount From GreaseAmount Where RobotType='"+textBox1.Text+"' And ServoTime='"+textBox2.Text+"'";
以上只是一串字符串而已啊
用SqlCommand comm = new SqlCommand(str,conn);
comm.ExecuteReader();
返回一个SqlDataReader在转成string 阿