gridview更新的问题
更新的时候提示错误如下:
异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。
源错误:
行 81: protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
行 82: {
行 83: string id = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("班级号")).Text;行 84: string name = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("班级名")).Text;
行 85: string ren = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("班主任")).Text;
更新代码如下:
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
string id = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("班级号")).Text;
string name = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("班级名")).Text;
string ren = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("班主任")).Text;
string conn = ConfigurationSettings.AppSettings["mc"];
SqlConnection myconn = new SqlConnection(conn);
myconn.Open();
string sqlstr="updata bje set 班级号="+id+",班级名="+name+",班主任="+ren+" ";
SqlCommand mycom = new SqlCommand(sqlstr, myconn);
mycom.ExecuteNonQuery();
myconn.Close();
GridView1.EditIndex=-1;
GridView1.DataBind();
}
请问哪里出问题 了,麻烦各位帮一下忙,谢谢