ASP.NET ListView EditItemTemplate/ItemCommand [英] ASP.NET ListView EditItemTemplate/ItemCommand
问题描述
大家好，
我有点难以让EditItemTemplate/ItemCommand在我创建的列表视图上工作.请参见下面的代码:
Hi all,
I am a little be stuck getting the EditItemTemplate/ItemCommand to work on a listview I have created. Please see code below:
<asp:ListView runat="server" ID="AdminUserControl" OnItemCommand="AdminUserControl_ItemCommand">
<LayoutTemplate>
<table>
<tr>
<th>
<asp:LinkButton ID="UserIDlb" runat="server">User ID</asp:LinkButton>
</th>
<th>
<asp:LinkButton ID="UserNamelb" runat="server">User Name</asp:LinkButton>
</th>
<th>
<asp:LinkButton ID="Emaillb" runat="server">Email Address</asp:LinkButton>
</th>
<th>
<asp:LinkButton ID="Rolelb" runat="server">Role</asp:LinkButton>
</th>
<th>
<asp:Label ID="Controllbl" runat="server">Controls</asp:Label>
</th>
<th></th>
</tr>
<tr id="itemPlaceholder" runat="server"></tr>
</table>
</LayoutTemplate>
<ItemTemplate>
<tr id="Tr1" runat="server">
<td>
<asp:Label ID="UserIDlbl" runat="server"><%#Eval("UserID") %></asp:Label>
</td>
<td>
<asp:Label ID="UserNamelbl" runat="server"><%#Eval("UserName") %></asp:Label>
</td>
<td>
<asp:Label ID="Emaillbl" runat="server"><%#Eval("Email") %></asp:Label>
</td>
<td>
<asp:Label ID="Rolelbl" runat="server"><%#Eval("Role") %></asp:Label>
</td>
<td>
<asp:LinkButton ID="lnkEdit" runat="server" CommandName="Edit">Edit</asp:LinkButton>
<asp:LinkButton ID="lnkDelete" runat="server" CommandName="Delete">Delete</asp:LinkButton>
<asp:LinkButton ID="lnkCancel" runat="server" CommandName="Cancel">Cancel</asp:LinkButton>
</td>
</tr>
</ItemTemplate>
<EditItemTemplate>
<tr id="Tr2" runat="server">
<td>
<asp:TextBox ID="UserIDtxt" runat="server" Enabled="false" Text='<%#Eval("UserID") %>' Width="100px"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="UserNametxt" runat="server" Text='<%#Eval("UserName") %>' Width="100px"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="Emailtxt" runat="server" Text='<%#Eval("Email") %>' Width="100px"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="Roletxt" runat="server" Text='<%#Eval("Role") %>' Width="100px"></asp:TextBox>
</td>
<td>
<asp:Button ID="Updatebtn" runat="server" CommandName="Update" Text="Update" />
</td>
</tr>
</EditItemTemplate>
</asp:ListView>
protected void AdminUserControl_ItemCommand(object sender, ListViewCommandEventArgs e)
{
if (e.CommandName == "Edit")
{
TextBox UserIDtxt = (TextBox)e.Item.FindControl("UserIDtxt");
TextBox UserNametxt = (TextBox)e.Item.FindControl("UserNametxt");
TextBox Emailtxt = (TextBox)e.Item.FindControl("Emailtxt");
TextBox Roletxt = (TextBox)e.Item.FindControl("Roletxt");
user = new User();
user.UserID = Convert.ToInt16(UserIDtxt.Text);
user.UserName = UserNametxt.Text;
user.Email = Emailtxt.Text;
user.Role = Roletxt.Text;
admin.UpdateUsers(user);
}
}
对大量HTML表示歉意，但我想确保整个列表视图都在那里.
我得到的错误是user.UserID = Convert.ToInt16(UserIDtxt.Text)上的NullReferenceException.我删除了这行代码，然后再次运行该应用程序，只是在user.UserName行上得到了相同的错误.
我知道发生了什么-该值没有从文本框传递给用户，但我不知道为什么.
任何帮助将不胜感激.
Dan
Apologies for large amount of HTML but I wanted to make sure the whole listview was there.
The error I am getting is a NullReferenceException on user.UserID = Convert.ToInt16(UserIDtxt.Text). I removed this line of code and ran the app again only to get the same error on the user.UserName line.
I know whats happening - the value isn''t being passed from the text box to the user but I have no idea why.
Any help would be appreciated.
Dan
推荐答案
为正在浏览类似内容的任何人解决-
Solved it for anyone who is looking at similar -
protected void AdminUserControl_ItemEditing(object sender, ListViewEditEventArgs e)
{
AdminUserControl.EditIndex = e.NewEditIndex;
UserBLL userbll = new UserBLL();
AdminUserControl.DataSource = userbll.GetAllUsers();
AdminUserControl.DataBind();
}
protected void AdminUserControl_ItemUpdating(object sender, ListViewUpdateEventArgs e)
{
UserBLL userbll = new UserBLL();
TextBox UserIDtxt = (TextBox)e.NewValues["UserIDtxt"];
TextBox UserNametxt = (TextBox)e.NewValues["UserNametxt"];
TextBox Emailtxt = (TextBox)e.NewValues["Emailtxt"];
TextBox Roletxt = (TextBox)e.NewValues["Roletxt"];
user = new User();
user.UserID = Convert.ToInt16(UserIDtxt.Text);
user.UserName = UserNametxt.Text;
user.Email = Emailtxt.Text;
user.Role = Roletxt.Text;
admin.UpdateUsers(user);
}
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