我正在尝试制作可编辑的GridView，当调用RowUpdating时，我从TextBoxes获得的值是旧值而不是新值。
我的GridView：
<asp:GridView ID="GVProducts" runat="server" AutoGenerateColumns="False"
CellPadding="4" BackColor="White" BorderColor="#3366CC" BorderStyle="None"
BorderWidth="1px" DataKeyNames="phoneId"
onrowcancelingedit="GVProducts_RowCancelingEdit"
onrowdeleting="GVProducts_RowDeleting"
onrowediting="GVProducts_RowEditing" onrowupdating="GVProducts_RowUpdating"
>
<Columns>
<asp:CommandField ButtonType="Button" EditText="ערוך" HeaderText="עריכה"
InsertText="הוסף" NewText="חדש" SelectText="בחר" ShowEditButton="True"
UpdateText="עדכן" CancelText="בטל" DeleteText="מחק"
InsertVisible="False" CausesValidation="False" />
<asp:CommandField ButtonType="Button" CancelText="בטל" DeleteText="מחק"
EditText="ערוך" InsertText="הוסף" NewText="חדש" SelectText="בחר"
ShowDeleteButton="True" UpdateText="עדכן" HeaderText="מחיקה"
CausesValidation="False" />
<asp:BoundField DataField="phoneId" HeaderText="מספר מכשיר" ReadOnly="True"
SortExpression="phoneId" />
<asp:TemplateField HeaderText="צבע">
<ControlStyle Width="100px" />
<FooterStyle Width="100px" />
<HeaderStyle Width="100px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="חברה">
<ItemTemplate>
<asp:Label ID="lblBrand" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="דגם">
<ItemTemplate>
<asp:Label ID="lblModel" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="כמות" SortExpression="amount">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("amount") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("amount") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="כמות מינימלית" SortExpression="minAmount">
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("minAmount") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("minAmount") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="price" HeaderText="מחיר" SortExpression="price" />
<asp:TemplateField HeaderText="תמונה">
<ItemTemplate>
<asp:Image ID="img" runat="server"
ImageUrl='<%# DataBinder.Eval(Container.DataItem,"pic","images/{0}") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#99CCCC" ForeColor="#003399" />
<HeaderStyle BackColor="#003399" Font-Bold="True" ForeColor="#CCCCFF" />
<PagerStyle BackColor="#99CCCC" ForeColor="#003399" HorizontalAlign="Left" />
<RowStyle BackColor="White" ForeColor="#003399" />
<SelectedRowStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
<SortedAscendingCellStyle BackColor="#EDF6F6" />
<SortedAscendingHeaderStyle BackColor="#0D4AC4" />
<SortedDescendingCellStyle BackColor="#D6DFDF" />
<SortedDescendingHeaderStyle BackColor="#002876" />
</asp:GridView>
我的RowEditing（UpdateGVLabel无关）：
protected void GVProducts_RowEditing(object sender, GridViewEditEventArgs e)
{
GVProducts.EditIndex = e.NewEditIndex;
GVProducts.DataSource = products;
UpdateGVlabel();
//products = connection.GetData("Select * From Products", "Products");
if (products.Rows.Count > 0)
{
((TextBox)GVProducts.Rows[e.NewEditIndex].Cells[6].Controls[1]).Text = products.Rows[e.NewEditIndex][4].ToString();
((TextBox)GVProducts.Rows[e.NewEditIndex].Cells[7].Controls[1]).Text = products.Rows[e.NewEditIndex][5].ToString();
}
}
我的RowUpdating（UpdateGVLabel无关）：
protected void GVProducts_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
bool abort = false;
int amount = 0, minAmount = 0;
int id = int.Parse(GVProducts.Rows[e.RowIndex].Cells[2].Text);
try
{
amount = int.Parse(((TextBox)GVProducts.Rows[e.RowIndex].Cells[6].Controls[1]).Text);
minAmount = int.Parse(((TextBox)GVProducts.Rows[e.RowIndex].Cells[7].Controls[1]).Text);
if (amount < minAmount)
{
MessageBox.Show("אין אפשרות להגדיר כמות שקטנה מהכמות המינימלית!");
abort = true;
}
if (minAmount <= 0)
{
MessageBox.Show("כמות מינימלית לא יכולה להיות אפס או פחות!\nאם ברצונך לציין שהחנות לא מוכרת את המכשיר הזה, יש ללחוץ על \"מחק\"");
abort = true;
}
if (amount < 0)
{
MessageBox.Show("כמות לא יכולה להיות שלילית");
abort = true;
}
}
catch (FormatException)
{
MessageBox.Show("כמויות חייבות להיות מספרים!");
abort = true;
}
if (!abort)
{
connection = new Connect(Server.MapPath("App_Data/ado1.mdb"));
OleDbCommand cmd = new OleDbCommand();
cmd.CommandText = "Update Products Set amount=" + amount + ", minAmount=" + minAmount + " Where phoneId=" + id;
products = connection.GetData("Select * From Products", "Products");
connection.ChangeDatabase(cmd); GVProducts.EditIndex = -1;
GVProducts.DataSource = products;
UpdateGVlabel();
MessageBox.Show("המכשיר נערך בהצלחה!");
}
}
谢谢！
答案 0 :(得分：1)
试试这个
protected void GVProducts_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//your code
if (!abort)
{
connection = new Connect(Server.MapPath("App_Data/ado1.mdb"));
OleDbCommand cmd = new OleDbCommand();
cmd.CommandText = "Update Products Set amount=" + amount + ", minAmount=" + minAmount + " Where phoneId=" + id;
cmd.ExecuteNonQuery();//OR "connection.ChangeDatabase(cmd);" if it updates your database
products = connection.GetData("Select * From Products", "Products");
GVProducts.EditIndex = -1;
GVProducts.DataSource = products;
GVProducts.DataBind();
UpdateGVlabel();
MessageBox.Show("המכשיר נערך בהצלחה!");
}
}
问题是你在从connection.ChangeDatabase(cmd);这样的表中获取数据后调用products = connection.GetData("Select * From Products", "Products");来更新你的数据库因此你总是从你的数据库中得到旧的值，你的数据库中的值也得到了更新。
在提供数据源GVProducts.DataBind();以绑定网格后，还要添加此GVProducts.DataSource = products;。
答案 1 :(得分：0)
在行更新中编写代码
int i=convert.toint32(e.NewValues["Standard"])
答案 2 :(得分：0)
IsPostBack（）就是答案。我们必须检查页面是否被回发。如果没有，那么我们将绑定网格。
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGrid();
}
}