本文介绍了在RowUpdating(ASP.NET GridView)C#中获取GridView内部标签的旧值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我一直在努力寻找一种方法来在GridView中获得标签的旧"值.我尝试使用hiddenFields保存它们(这会给我这个错误)使用hiddenFields时出错
I've been struggling to find a way to get an "old" value of a label in my GridView. I've tried using hiddenFields to save them (this would give me this error)Error when using hiddenFields
我也尝试使用EventArgs(e.OldValues)，但它们始终为空(e.NewValues也是如此)
I've also tried using the EventArgs (e.OldValues) but those were always empty (So were the e.NewValues)
有人可以帮我吗?我的GridView:
Can anyone help me out?My GridView:
<asp:GridView CssClass="gridview" ID="GridViewAdmin_Users" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" AllowPaging="True" OnPageIndexChanging="GridViewAdmin_Users_PageIndexChanging" OnRowCancelingEdit="GridViewAdmin_Users_RowCancelingEdit" OnRowDeleting="GridViewAdmin_Users_RowDeleting" OnRowEditing="GridViewAdmin_Users_RowEditing" OnRowUpdating="GridViewAdmin_Users_RowUpdating" DataKeyNames="ID" EnableViewState="True">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:TemplateField HeaderText="ID">
<ItemTemplate>
<asp:Label ID="lblUsersID" runat="server" Text='<%# Eval("id") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Gebruikersnaam">
<EditItemTemplate>
<asp:TextBox ID="txtUserEditNaam" runat="server" Text='<%# Eval("naam") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblUsersName" runat="server" Text='<%# Eval("naam") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Bijnaam">
<EditItemTemplate>
<asp:TextBox ID="txtUserEditBijnaam" runat="server" Text='<%# Eval("bijnaam") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblUsersNickname" runat="server" Text='<%# Eval("bijnaam") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Wachtwoord">
<EditItemTemplate>
<asp:HiddenField ID="OldPassword" Value='<%# Bind("password") %>' runat="server" />
<asp:TextBox ID="txtUserEditPassword" runat="server" Text='<%# Eval("password") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblUsersWachtwoord" runat="server" Text='<%# Eval("password") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Salt">
<EditItemTemplate>
<asp:HiddenField ID="OldSalt" Value='<%# Bind("salt") %>' runat="server" />
<asp:TextBox ID="txtUserEditSalt" runat="server" Text='<%# Eval("salt") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblUsersSalt" runat="server" Text='<%# Eval("salt") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Machtigingen">
<EditItemTemplate>
<asp:TextBox ID="txtUserEditPermission" runat="server" Text='<%# Eval("permission") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblUsersPermissions" runat="server" Text='<%# Eval("permission") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="ChangePassword">
<EditItemTemplate>
<asp:TextBox ID="txtUserEditChangePW" runat="server" Text='<%# Eval("changepassword") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblChangePassword" runat="server" Text='<%# Eval("changepassword") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowEditButton="True" ButtonType="Button" EditText="Aanpassen" />
<asp:CommandField ShowDeleteButton="True" ButtonType="Button" EditText="Verwijderen" />
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
我的代码隐藏:
protected void GridViewAdmin_Users_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
ShowActiveGrid("panelUsers");
int id = Convert.ToInt16(GridViewAdmin_Users.DataKeys[e.RowIndex].Value);
// Naam ophalen vanuit de inline edit
TextBox txtUserEditNaam = GridViewAdmin_Users.Rows[e.RowIndex].FindControl("txtUserEditNaam") as TextBox;
string naam = txtUserEditNaam.Text.Trim();
// Bijnaam ophalen vanuit de inline edit
TextBox txtUserEditBijnaam = GridViewAdmin_Users.Rows[e.RowIndex].FindControl("txtUserEditBijnaam") as TextBox;
string bijnaam = txtUserEditBijnaam.Text.Trim();
// Password ophalen vanuit de inline edit
TextBox txtUserEditPassword = GridViewAdmin_Users.Rows[e.RowIndex].FindControl("txtUserEditPassword") as TextBox;
string password = txtUserEditPassword.Text;
// Salt ophalen vanuit de inline edit
TextBox txtUserEditSalt = GridViewAdmin_Users.Rows[e.RowIndex].FindControl("txtUserEditSalt") as TextBox;
string salt = txtUserEditSalt.Text;
// Permission ophanel vanuit de inline edit
TextBox txtUserEditPermission = GridViewAdmin_Users.Rows[e.RowIndex].FindControl("txtUserEditPermission") as TextBox;
string permission = txtUserEditPermission.Text;
// ChangePassword ophalen vanuit de inline edit
TextBox txtUserEditChangePW = GridViewAdmin_Users.Rows[e.RowIndex].FindControl("txtUserEditChangePW") as TextBox;
bool chanepassword = Convert.ToBoolean(txtUserEditChangePW.Text);
// Wachtwoorden en salt vergelijken
Label lblpassword = GridViewAdmin_Users.Rows[e.RowIndex].FindControl("OldPassword") as Label;
string orginial_password = lblpassword.Text;
Label lblsalt = GridViewAdmin_Users.Rows[e.RowIndex].FindControl("OldSalt") as Label;
string original_salt = lblsalt.Text;
// Hier vergelijken we het orginele wachtwoord met het 'nieuwe' wachtwoord.
// Als die gelijk zijn betekent dat de gebruiker niets heeft gewijzigd aan het wachtwoord en dat we het wachtwoord kunnen laten zoals het was
// Als de gebruiker echter een nieuw wachtwoord heeft ingevoerd dan kunnen we die niet in cleartext laten staan want:
// - Dat is onveilig
// - Hij zou nooit kunnen inloggen omdat het systeem denkt dat het het wachtwoord moet gehasht worden.
if (orginial_password != password)
{
password = Security.GetHash(Security.GetHashAlgorithm(), password, salt);
}
if (orginial_password == password && original_salt != salt)
{
//exception ex = new exception("voer ook het wachtwoord opnieuw in als je de salt wijzigt");
//throw (ex);
GridViewAdmin_Users.EditIndex = -1;
}
// Edit uitvoeren
if ((string)Session["permission"] == "WRITE" || (string)Session["permission"] == "*")
{
controller.EditUser(id, naam, bijnaam, password, permission, chanepassword, salt);
// Controlleren of het systeem deze wijziging moet loggen.
if (controller.Settings["log_users_edit"])
{
controller.Log((int)Session["uid"], "EDIT", (string)Session["username"] + " heeft een user (" + id + ") aangepast.");
}
}
// Grid opnieuw laden
GridViewAdmin_Users.EditIndex = -1;
Grid();
}
推荐答案
您可以在GridView中使用 DataKeyNames .
You can use DataKeyNames in the GridView.
<asp:GridView ID="GridViewAdmin_Users" runat="server" DataKeyNames="OldPassword, OldSalt">
然后您就可以在后面的代码中访问这些键值.
Then you have access to those key values in code behind.
string orginial_password = GridViewAdmin_Users.DataKeys[e.RowIndex].Values[0];
string original_salt = GridViewAdmin_Users.DataKeys[e.RowIndex].Values[1];
这篇关于在RowUpdating(ASP.NET GridView)C#中获取GridView内部标签的旧值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！