索引和长度必须引用该字符串内的位置。 参数名: length
大家帮忙看看错哪了！

C# code

 string FileContent = Session["data"].ToString();        string Name = name.Text.Trim().ToString();        string zuozhe = author.Text.Trim().ToString();        string jieshao = jianjie.Text.Trim().ToString();        string str = "insert into achievements(project_name,deveolpers,explanation,url) values('" + Name + "','" + zuozhe + "'','" + jieshao + "','" + FileContent + "')";        if (gwolf_bll.action1(str))        {            Response.Write("<script>alert('数据插入成功！')</script>");        }        else        {            Response.Write("<script>alert('数据插入失败！')</script>");        }  public static bool action1(string SQLstring)        {            return gwolf_dal.zx(SQLstring);        } public static bool zx(string SQLstring)        {            ConOpen();            Sqlcmd = new MySqlCommand(SQLstring, Sqlcon);            try            {                int count = Convert.ToInt32(Sqlcmd.ExecuteNonQuery());                if (count > 0)                {                    return true;                }                else                {                    return false;                }            }            catch (Exception)            {                return false;            }            finally            {                ConClose();            }        }

[解决办法]
string str = "insert into achievements(project_name,deveolpers,explanation,url) values('" + Name + "','" + zuozhe + "'','" + jieshao + "','" + FileContent + "')";
红色部分多了一个单引号，去掉，建议用参数化查询
[解决办法]
http://blog.csdn.net/pksniq/article/details/6870388

http://oswica.blog.51cto.com/756561/467580