【发布时间】：2010-01-08 12:28:35
【问题描述】：
所以我在 UpdatePanel 中有一个数据绑定网格视图。
这个想法是，用户可以更改网格视图中的数据，然后单击保存按钮来更新数据库中的数据。
但是，为了知道哪些行已更改，我有一个与每个文本框关联的 textChanged 事件，但该事件并未被触发。
这是 ASP 代码：
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<span>To update your poducts simply change the details below and click Save...</span>
<div class="ProductList">
<asp:GridView ID="ProductList" runat="server" AllowPaging="True" AutoGenerateColumns="False"
BackColor="#FFFBD6" BorderColor="#FFCC66" BorderStyle="None" BorderWidth="1px"
CellPadding="3" OnPageIndexChanged="ProductList_PageIndexChanged" OnPageIndexChanging="ProductList_PageIndexChanging"
PagerSettings-Mode="NumericFirstLast" PageSize="5">
<FooterStyle BackColor="White" ForeColor="#990000" />
<Columns>
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<asp:TextBox ID="tbName" AutoPostBack="true" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
Text='<%# Bind("productName") %>'></asp:TextBox>
<asp:HiddenField ID="HiddenField1" runat="server" Value='<%# Eval("productID") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Description">
<ItemTemplate>
<asp:TextBox ID="tbDesc" AutoPostBack="true" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
Text='<%# Bind("productDesc") %>' TextMode="MultiLine"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Price">
<ItemTemplate>
<asp:TextBox ID="tbPrice" AutoPostBack="true" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
Text='<%# Bind("productPrice", "{0:C}") %>'></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Select">
<ItemTemplate>
<asp:CheckBox id="cbDelete" AutoPostBack="true" EnableViewState="true" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle ForeColor="#000066" />
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="beige" ForeColor="#000066" HorizontalAlign="Left" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
</asp:GridView>
</div>
<div class="ProductListButtons">
<asp:ImageButton AlternateText="Add" ToolTip="Add New Product" Width="30px" Height="30px"
ImageUrl="~/Images/Add.png" ID="AddBtn" runat="server" OnClick="AddBtn_Click" />
<asp:ImageButton ID="DeleteBtn" runat="server" AlternateText="Delete" Height="30px"
ImageUrl="~/Images/delete.png" ToolTip="Delete Selected" Width="30px" OnClick="DeleteBtn_Click" />
<asp:ImageButton AlternateText="Save Changes" ToolTip="Save Changes" Width="30px"
Height="30px" ImageUrl="~/Images/save-icon.png" ID="SaveBtn" runat="server" OnClick="SaveBtn_Click" />
</div>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="ProductList" EventName="PageIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="DeleteBtn" EventName="Click" />
</Triggers>
这里是 C#：
using System;
using System.Data;
using BusinessLogicLayer;
using DataAccessLayer.Objects;
using System.Web.UI.WebControls;
public partial class Controls_ProductList : System.Web.UI.UserControl
{
public int StallID { get; set; }
bool[] rowChanged;
bool[] rowDeleted;
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
StallID = Convert.ToInt16(ViewState["StallID"].ToString());
}
int totalRows = ProductList.Rows.Count;
rowChanged = new bool[totalRows];
rowDeleted = new bool[totalRows];
BindList();
ViewState.Add("StallID", StallID);
}
public void BindList()
{
StallHandler handler = new StallHandler();
DataTable productList = handler.GetProductsByID(StallID);
ProductList.DataSource = productList;
ProductList.DataBind();
}
protected void TextBox_TextChanged(object sender, EventArgs e)
{
TextBox thisTextBox = (TextBox)sender;
GridViewRow thisGridViewRow = (GridViewRow)thisTextBox.Parent.Parent;
int row = thisGridViewRow.RowIndex;
rowChanged[row] = true;
}
protected void cbDelete_CheckedChanged(object sender, EventArgs e)
{
CheckBox thisCheckbox = (CheckBox)sender;
GridViewRow thisGridViewRow = (GridViewRow)thisCheckbox.Parent.Parent;
int row = thisGridViewRow.RowIndex;
rowDeleted[row] = true;
}
protected void Page_PreRender(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
ProductList.DataBind();
}
}
protected void ProductList_PageIndexChanged(object sender, EventArgs e)
{
}
protected void ProductList_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
ProductList.PageIndex = e.NewPageIndex;
ProductList.DataBind();
}
protected void AddBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
Response.Redirect("../StallHolder/AddProduct.aspx");
}
protected void DeleteBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
int totalRows = ProductList.Rows.Count;
for (int r = 0; r < totalRows; r++)
{
if (rowDeleted[r])
{
GridViewRow thisGridViewRow = ProductList.Rows[r];
HiddenField hf1 = (HiddenField)thisGridViewRow.FindControl("HiddenField1");
string ID = hf1.Value;
StallHandler handler = new StallHandler();
handler.DeleteProduct(Convert.ToInt16(ID));
}
}
BindList();
}
protected void SaveBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
int totalRows = ProductList.Rows.Count;
for (int r = 0; r < totalRows; r++)
{
if (rowChanged[r])
{
GridViewRow thisGridViewRow = ProductList.Rows[r];
HiddenField hf1 = (HiddenField)thisGridViewRow.FindControl("HiddenField1");
string ID = hf1.Value;
TextBox tbName = (TextBox)thisGridViewRow.FindControl("tbName");
string Name = tbName.Text;
TextBox tbDesc = (TextBox)thisGridViewRow.FindControl("tbDesc");
string Desc = tbDesc.Text;
TextBox tbPrice = (TextBox)thisGridViewRow.FindControl("tbPrice");
string Price = tbPrice.Text;
//Code to update the database!
}
}
}
}
抱歉，代码很繁重，但我不知道我做错了什么或在哪里。
【问题讨论】：
-
很抱歉提到可编辑的网格视图来自本教程wherecanibuyit.co.uk/ASP/fully_editable_gridview.html，但这并没有在更新面板中使用它
-
所以如果你勾选了一些复选框，然后按下添加按钮，它不会在
AddBtn_Click之前调用cbDelete_CheckedChanged？对我来说似乎一切正常，让我构建一个示例项目并对其进行测试。 -
没有复选框的想法是您可以选择产品，然后单击 DeleteBtn 删除它们，但是每当您单击复选框时 Checkbox_CheckedChanged 事件不会触发，因此我希望的产品删除不记录。
-
我让你的代码在我的一个项目中工作。好吧，当我说工作时，我知道出了什么问题……我认为您对此考虑太多了，并且有一种更简单的方法可以做您想做的事。我会在几分钟内发布我的代码作为答案。