Question

我在VS 2005中有一个gridview。网格显示在文本框中，所以用户可以编辑。

<asp:TemplateField ItemStyle-Width="50"> 
     <ItemTemplate> 
      <asp:TextBox ID="txtSmall" runat="server" Width="45px" Text='<%#DataBinder.Eval(Container.DataItem,"Small") %>' OnTextChanged="TxtSmallChanged"> </asp:TextBox>               
     </ItemTemplate> 
    </asp:TemplateField> 
    <asp:TemplateField ItemStyle-Width="50"> 
     <ItemTemplate> 
      <asp:TextBox ID="txtMedium" runat="server" Width="45px" Text='<%#DataBinder.Eval(Container.DataItem,"Medium") %>' OnTextChanged="TxtMediumChanged"> </asp:TextBox>               
     </ItemTemplate> 
    </asp:TemplateField> 
<asp:TemplateField ItemStyle-Width = "50"> 
     <ItemTemplate> 
      <asp:TextBox ID="txtTotal" runat="server" Width="45px" Text='<%#DataBinder.Eval(Container.DataItem,"Total") %>'> </asp:TextBox> 
      </ItemTemplate>              
     </asp:TemplateField> 

每当文本框txtsmall或txtmedium变化（数字），文本框txttotal必须得到更新，如txtSmall和txtmedium总两者。当文本被改变时，我使用了一个函数TxtSmallChanged。我如何编写代码隐藏功能来更新txtTotal。我希望我很清楚。非常感谢！！

Answer 1

试试这个：
设置的AutoPostBack =真

protected void txtSmall_TextChanged(object sender, EventArgs e) 
    { 
     TextBox t = (TextBox)sender; 
     GridViewRow r = (GridViewRow)t.NamingContainer; 
     Txtchanged(r.RowIndex); 
    } 

    protected void txtMedium_TextChanged(object sender, EventArgs e) 
    { 
     TextBox t = (TextBox)sender; 
     GridViewRow r = (GridViewRow)t.NamingContainer; 
     Txtchanged(r.RowIndex); 
    } 

    private void Txtchanged(int row_index) 
    { 
     TextBox t1 = (TextBox)GridView1.Rows[row_index].Cells[0].FindControl("txtSmall"); 
     TextBox t2 = (TextBox)GridView1.Rows[row_index].Cells[0].FindControl("txtMedium"); 
     TextBox t3 = (TextBox)GridView1.Rows[row_index].Cells[0].FindControl("txtTotal"); 
     t3.Text = (Convert.ToInt32(t1.Text) + Convert.ToInt32(t2.Text)).ToString(); 

    } 

你可以用新值更新数据库中Txtchanged