将更新的Gridview行保存到我的数据库表

Question

我在数据库TextBooks中的表中为绑定数据的Gridview添加了一个编辑/更新选项。 我允许这样做，以防管理员可以随后更改信息。 目前我可以单击信息中的编辑类型，然后将其绑定到页面上的当前网格，但不将其保存到数据库，并在离开页面并返回到它时，它将恢复为旧值。 在遵循BindGrid（）方法的代码后，我相信我在某个地方出了问题但却无法完全掌握它是什么，我错过了。

 protected void Page_Load(object sender, EventArgs e)
    {
        if (!this.IsPostBack)
        {
            DataTable dt = new DataTable();
            string query = "select  * from textBooks   ";
            using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["HUTDMSConnectionString"].ToString()))
            using (SqlDataAdapter adapter = new SqlDataAdapter(query, connection))


                adapter.Fill(dt);
            ViewState["allBooks"] = dt;
            this.BindGrid();
        }
    }

    protected void BindGrid()
    {
        GridView1.DataSource = ViewState["allBooks"] as DataTable;
        GridView1.DataBind();
    }

    protected void OnRowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        this.BindGrid();
    }

    protected void OnUpdate(object sender, EventArgs e)
    {
        GridViewRow row = (sender as LinkButton).NamingContainer as GridViewRow;

        string Ancillary = (row.Cells[3].Controls[0] as TextBox).Text;
        string BookActive = (row.Cells[4].Controls[0] as TextBox).Text;          
        string InactiveDate = (row.Cells[6].Controls[0] as TextBox).Text;
        string Author = (row.Cells[7].Controls[0] as TextBox).Text;
        string Publisher = (row.Cells[8].Controls[0] as TextBox).Text;
        string EditionAndDate = (row.Cells[9].Controls[0] as TextBox).Text;
        string Imprint = (row.Cells[10].Controls[0] as TextBox).Text;
        string eISBN = (row.Cells[13].Controls[0] as TextBox).Text;
        string ebookAvailable = (row.Cells[14].Controls[0] as TextBox).Text;
        string Notes = (row.Cells[15].Controls[0] as TextBox).Text;

        DataTable dt = ViewState["allBooks"] as DataTable;

        dt.Rows[row.RowIndex]["Ancillary"] = Ancillary;
        dt.Rows[row.RowIndex]["BookActive"] = BookActive;
        dt.Rows[row.RowIndex]["InactiveDate"] = InactiveDate;
        dt.Rows[row.RowIndex]["Author"] = Author;
        dt.Rows[row.RowIndex]["Publisher"] = Publisher;
        dt.Rows[row.RowIndex]["EditionAndDate"] = EditionAndDate;
        dt.Rows[row.RowIndex]["Imprint"] = Imprint;
        dt.Rows[row.RowIndex]["eISBN"] = eISBN;
        dt.Rows[row.RowIndex]["ebookAvailable"] = ebookAvailable;
        dt.Rows[row.RowIndex]["Notes"] = Notes;


        ViewState["allBooks"] = dt;
        GridView1.EditIndex = -1;
        this.BindGrid();
    }

Answer 1

所以你目前正在做的是从数据库中提取数据，将其存储在gridview中，然后在GridView中编辑数据。 一旦调用该databind命令，该数据就会独立于数据库。 为了将这些数据保存到数据库，我建议在OnUpdate方法中使用SqlDataAdapter的Update方法。 这将允许您将更新值存储回数据行并将其保存到数据库，同时遵循与填充GridView时类似的策略。