wie um zu überprüfen, Sicht Staat existiert in asp.net 4.0

ich nur implementieren Sie eine editierbare grid-Ansicht mit asp.net 4.0. jetzt muss ich nur legen Sie die ViewState für die Speicherung nur für dieses Dokument mit diesem code :

 protected void DDL_Types1_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList ddl = (DropDownList)sender as DropDownList;
        GridViewRow row = ddl.Parent.Parent as GridViewRow;
        if (!ddl.SelectedItem.Value.Equals("-1"))
        {
            ViewState["type_id"] = ddl.SelectedItem.Value.ToString();
        }
    }
    protected void DDL_StateNames1_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList ddl = (DropDownList)sender as DropDownList;
        GridViewRow row = ddl.Parent.Parent.Parent.Parent as GridViewRow;
        if (!ddl.SelectedItem.Value.Equals("-1"))
        {
            ViewState["state_id"] = ddl.SelectedItem.Value.ToString();
        }
    }
    protected void chk_UserOFC1_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox chk = (CheckBox)sender as CheckBox;
        GridViewRow row = chk.Parent.Parent.Parent.Parent as GridViewRow;
        ViewState["UserOFC"] = chk.Checked.ToString();
    }
    protected void chk_UserVAT1_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox chk = (CheckBox)sender as CheckBox;
        GridViewRow row = chk.Parent.Parent.Parent.Parent as GridViewRow;
        ViewState["UserVAT"] = chk.Checked.ToString();
    }
    protected void chk_UserINV1_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox chk = (CheckBox)sender as CheckBox;
        GridViewRow row = chk.Parent.Parent.Parent.Parent as GridViewRow;
        ViewState["UserINV"] = chk.Checked.ToString();
    }
    protected void chk_UserNone1_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox chk = (CheckBox)sender as CheckBox;
        GridViewRow row = chk.Parent.Parent.Parent.Parent as GridViewRow;
        ViewState["UserNone"] = chk.Checked.ToString();
    }

nun in der grid-Ansicht Zeile aktualisieren, die ich habe, um zu überprüfen, dass der ViewState existiert oder nicht, weil, wenn der Benutzer nicht wählen Sie es oder überprüfen Sie das Kontrollkästchen Werte dann nicht zugegriffen.

hier ist mein grid-Ansicht Zeile aktualisieren von code :

protected void  GV_ViewCustomers_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        GridViewRow row = GV_ViewCustomers.Rows[e.RowIndex];
        int customerid = Convert.ToInt32(GV_ViewCustomers.DataKeys[e.RowIndex].Value.ToString());
        if (!string.IsNullOrEmpty(e.NewValues["Name"].ToString()) && !ViewState["type_id"].Equals("-1"))
        {
            using (DataClassesDataContext db = new DataClassesDataContext())
            {
                string owname = null, ownmono = null, room = null, build = null, road = null, area = null, city = null, mobile = null, phone = null, email = null, cpname = null, cpmono = null, remark = null;
                bool? UserOFC = null, UserVAT = null, UserINV = null, UserNone = null;
                int? country_id = null, state_id = null;
                if (!string.IsNullOrEmpty(e.NewValues["Ownername"].ToString().Trim()))
                {
                    owname = e.NewValues["Ownername"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["Ownermob"].ToString().Trim()))
                {
                    ownmono = e.NewValues["Ownermob"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["ContactPerson"].ToString().Trim()))
                {
                    cpname = e.NewValues["ContactPerson"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["ContactPersonmob"].ToString().Trim()))
                {
                    cpmono = e.NewValues["ContactPersonmob"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["Phone"].ToString().Trim()))
                {
                    phone = e.NewValues["Phone"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["Mobile"].ToString().Trim()))
                {
                    mobile = e.NewValues["Mobile"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["Room"].ToString().Trim()))
                {
                    room = e.NewValues["Room"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["Build"].ToString().Trim()))
                {
                    build = e.NewValues["Build"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["Road"].ToString().Trim()))
                {
                    road = e.NewValues["Road"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["Area"].ToString().Trim()))
                {
                    area = e.NewValues["Area"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["City"].ToString().Trim()))
                {
                    city = e.NewValues["City"].ToString().Trim();
                }
                if (!ViewState["country_id"].Equals("-1"))
                {
                    country_id = int.Parse(ViewState["country_id"].ToString());
                }
                if (!ViewState["state_id"].Equals("-1"))
                {
                    state_id = int.Parse(ViewState["state_id"].ToString());
                }
                if (!string.IsNullOrEmpty(e.NewValues["Email"].ToString().Trim()))
                {
                    email = e.NewValues["Email"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(e.NewValues["Remark"].ToString().Trim()))
                {
                    remark = e.NewValues["Remark"].ToString().Trim();
                }
                if (!string.IsNullOrEmpty(ViewState["UserOFC"].ToString()))
                   //error occurs doesn't selected from user
                {
                    UserOFC = bool.Parse(ViewState["UserOFC"].ToString());
                }
                if (!string.IsNullOrEmpty(ViewState["UserVAT"].ToString()))
                {
                    UserVAT = bool.Parse(ViewState["UserVAT"].ToString());
                }
                if (!string.IsNullOrEmpty(ViewState["UserINV"].ToString()))
                {
                    UserINV = bool.Parse(ViewState["UserINV"].ToString());
                }
                if (!string.IsNullOrEmpty(ViewState["UserNone"].ToString()))
                {
                    UserNone = bool.Parse(ViewState["UserNone"].ToString());
                }
                db.UpdateParty(e.NewValues["Name"].ToString().Trim(), int.Parse(ViewState["type_id"].ToString()), owname, ownmono, room, build, road, area, city, phone, mobile, email, cpname, cpmono, UserOFC, UserVAT, UserINV, UserNone, state_id, country_id, remark, db.Users.Where(u => u.Username.Equals((String)Session["Username"])).Select(u => u.Ref_no).FirstOrDefault(), customerid);
                db.SubmitChanges();
                GV_ViewCustomers.EditIndex = -1;
                this.FillGrid((String)Session["StartAlpha"] ?? null, (int)Session["GroupByENTYPE"], (String)Session["ColumnName"] ?? null, (String)Session["SearchText"] ?? null);
                UpdatePanel10.Update();
                MPE.Show();
            }
        }
    }

InformationsquelleAutor Shal | 2014-05-29