Gridview Wert auf die nächste Seite und führen Update-Sachen

Question

Ich verwende 3-Tier-Architektur in meiner Website. Anstatt in Gridview zu aktualisieren, möchte ich Gridview-Zeilenwerte an andere Seite senden und dort Update-Sachen durchführen. Hier ist der Link-Code in der Ansichtsseite.

Update-Produkt-Seite laden Code:

protected void Page_Load(object sender, EventArgs e) 
    { 
     int productId = 0; 
     productId = Convert.ToInt32(Request.QueryString["ProductID"]); 
     ProductBL.GetProductById(productId); 
    } 

Get Produkt von ID-Funktionscode:

public static Product GetProductById(int productID) 
    { 
     Product product; 
     SqlCommand cmd = new SqlCommand(); 
     cmd.CommandText = "Select ProductName, Description, ItemsInSet, UnitPriceOwner, UnitPriceReseller, ShippingCost from Products where ProductID = @ProductID"; 

     cmd.Parameters.AddWithValue("@ProductID", SqlDbType.Int).Value = productID; 

     SqlDataReader reader = DbUtility.GetDataReader(cmd); 

     if (reader.HasRows) 
     { 
      product = new Product(); 
      reader.Read(); 
      product.ProductName = reader.GetString(0); 
      product.Description = reader.GetString(1); 
      product.ItemsInSet = reader.GetInt32(2); 
      product.UnitPriceOwner = reader.GetInt32(3); 
      product.UnitPriceReseller = reader.GetInt32(4); 
      product.ShippingCost = reader.GetInt32(5); 
      return product; 
     } 
     else 
     { 
      return null; 
     } 
    } 

UpdateProduct Seite:

<label><b>Title</b></label> 
     <asp:TextBox ID="TitleTextBox" runat="server" placeholder="Enter Product Title"></asp:TextBox> 
     <asp:RequiredFieldValidator id="RequiredFieldValidator1" runat="server" 
      ControlToValidate="TitleTextBox" 
      ErrorMessage="Product Name is a required field." 
      ForeColor="Red"> 
     </asp:RequiredFieldValidator> 


     <label><b>Description</b></label> 
     <asp:TextBox ID="DescriptionTextBox" runat="server" placeholder="Description"></asp:TextBox> 
     <asp:RequiredFieldValidator id="RequiredFieldValidator2" runat="server" 
      ControlToValidate="TitleTextBox" 
      ErrorMessage="Product Name is a required field." 
      ForeColor="Red"> 
     </asp:RequiredFieldValidator> 

     <label><b>Set of</b></label> 
     <asp:TextBox ID="SetTextBox" runat="server" placeholder="Enter quantity"></asp:TextBox> 
     <asp:RequiredFieldValidator id="RequiredFieldValidator3" runat="server" 
      ControlToValidate="SetTextBox" 
      ErrorMessage="Quantity is a required field." 
      ForeColor="Red"> 
     </asp:RequiredFieldValidator> 

     <label><b>Unit Price (Owner)</b></label> 
      <asp:TextBox ID="UnitOwnerTextBox" runat="server" placeholder="Unite Price Owner"></asp:TextBox> 
     <asp:RequiredFieldValidator id="RequiredFieldValidator4" runat="server" 
      ControlToValidate="UnitOwnerTextBox" 
      ErrorMessage="Unit Price Owner is a required field." 
      ForeColor="Red"> 
     </asp:RequiredFieldValidator> 

      <label><b>Unit Price (Reseller)</b></label> 
      <asp:TextBox ID="UnitResellerTextBox" runat="server" placeholder="Unite Price Reseller"></asp:TextBox> 
     <asp:RequiredFieldValidator id="RequiredFieldValidator5" runat="server" 
      ControlToValidate="UnitResellerTextBox" 
      ErrorMessage="Unit Price Reseller is a required field." 
      ForeColor="Red"> 
     </asp:RequiredFieldValidator> 

     <label><b>Choose Category</b></label><br /><br /> 
     <asp:DropDownList ID="CategoryDropDownList" runat="server" placeholder="Select Category" DataSourceID="SqlDataSource1" 
      DataTextField="CategoryName" DataValueField="CategoryID" ></asp:DropDownList> 
     <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:UmmatiConStr %>" SelectCommand="SELECT [CategoryName], [CategoryID] FROM [Categories]"></asp:SqlDataSource> 
     <br /><br /><hr /> 

     <label><b>Shipment Cost</b></label> 
      <asp:TextBox ID="ShipmentTextBox" runat="server" placeholder="Enter Shipment Charge"></asp:TextBox> 
     <asp:RequiredFieldValidator id="RequiredFieldValidator6" runat="server" 
      ControlToValidate="ShipmentTextBox" 
      ErrorMessage="Shipment Cost is a required field." 
      ForeColor="Red"> 
     </asp:RequiredFieldValidator> 

Kann mir jemand helfen, wie die Daten in Textfelder zu binden ?

public partial class UpdateProduct : System.Web.UI.Page 
{ 
    protected void Page_Load(object sender, EventArgs e) 
    { 
     int productId = 0; 
     productId = Convert.ToInt32(Request.QueryString["ProductID"]); 

     LoadProductDetails(productId); 
    } 

    protected void LoadProductDetails(int productId) 
    { 
     ProductBL.GetProductById(productId); 

     Product product = new Product(); 
     TitleTextBox.Text = product.ProductName; 
    } 

Hier Produktname ist null, während Sie den Code debuggen.

Answer 1

Sie müssen wie die TextBox setzen unter

TitleTextBox.Text = product.ProductName 

zuordnen kann in der Pageload

Basierend auf Update-

Sie benötigen

auf folgende Weise zuweisen erfolgen

var product = ProductBL.GetProductById(productId); 

     TitleTextBox.Text = product.ProductName;