自定义验证器是否在FormView中工作

我通过谷歌搜索，发现很多人都在努力解决这个问题，但我仍然没有找到正确的答案。

https://i.stack.imgur.com/15jen.png

我有一个表单视图，需要检查，如果语言代码是重复或不，它必须检查服务器端脚本，因为它需要通过数据库检查。

更新于2011年5月4日，19.32//我在这里添加了表单视图的属性，所以如果有什么错误，有人可以指出来。

<asp:FormView ID="fmvxLanguage" runat="server" EnableViewState="False" DefaultMode="Insert"
    Visible="False" Width="95%" DataSourceID="odsLanguage" DataKeyNames="LanguageCode"
    CssClass="formViewAdd">

//

<dxe:ASPxButton ID="btnAddNewLanguage" runat="server" CausesValidation="True"
Image-Url="~/images/icon/Save-icon.png" CommandName="Insert" Text="Save">
</dxe:ASPxButton>

使用插入命令作为插入按钮，Cause Validation设置为true。

<asp:CustomValidator ID="cvdLanguageCodeNameDuplicate" runat="server" 
                        ControlToValidate="txtLanguageCode" CssClass="IconValidation" 
                        ErrorMessage="&lt;img src=&quot;/images/icon/validation-Icon.png&quot;/&gt;     Language code name is duplicated." 
                        onservervalidate="cvdLanguageCodeNameDuplicate_ServerValidate">    </asp:CustomValidator>

自定义验证器设置如上

当我单击按钮并尝试将断点放在serverValidate事件时，我甚至没有到达那里

protected void cvdLanguageCodeNameDuplicate_ServerValidate(object source, ServerValidateEventArgs args)
    {
        if (LanguageHelper.HaveLanguageCode(args.Value))
        {
            args.IsValid = false;
        }
    }

就目前而言，我使用标签而不是自定义验证器通过检查是否值在事件formview_iteminsert有效，如果值是无效的，我只是使用e.Cancel (FormViewInsertEventArgs)，使标签可见。但是，我仍然想知道，如果自定义验证器是不工作的formview或我做错了什么。

谢谢。

下面的代码不是关于问题，但它可能是有用的，有人搜索到这个主题，可能有同样的问题。我必须重复很多次所以我为这个事件创建了可重用的类(使用label作为验证器)

public class clsFormViewDuplicationValidationSetter
{
    #region Property

    public FormView FormView { get; set; }
    public delegate bool DelDuplicationValidationNameOnly(string pStrName);
    public delegate bool DelDuplicationValidationNameAndId(string pStrName, int primaryId);
    public DelDuplicationValidationNameOnly DuplicationValidationNameOnly;
    public DelDuplicationValidationNameAndId DuplicationValidationDelegationNameAndId;

    public TextBox TextBoxNameToCheckForDuplication { get; set; }
    public Label LabelDuplicationValidationMessage { get; set; }
    #endregion
    #region Constructor
    /// <summary>
    /// Pattern For Simple Duplication ValidationName and Id
    /// </summary>
    /// <param name="pObjFormView">FormView</param>
    /// <param name="pObjTextBoxNameToCheckForDuplication">TextBoxName</param>
    /// <param name="pObjLabelDuplicationValidationMessage">Lable Showing Error Message</param>
    /// <param name="pObjDuplicationValidationNameAndId">Delegation for validation function (name and id)</param>
    public clsFormViewDuplicationValidationSetter(FormView pObjFormView, TextBox pObjTextBoxNameToCheckForDuplication, Label pObjLabelDuplicationValidationMessage, DelDuplicationValidationNameAndId pObjDuplicationValidationNameAndId)
    {
        this.FormView = pObjFormView;
        this.TextBoxNameToCheckForDuplication = pObjTextBoxNameToCheckForDuplication;
        this.LabelDuplicationValidationMessage = pObjLabelDuplicationValidationMessage;
        this.DuplicationValidationDelegationNameAndId = pObjDuplicationValidationNameAndId;
        FormView.ItemInserting += new FormViewInsertEventHandler(FormView_ItemInserting);
    }
    /// <summary>
    /// Pattern For Simple Duplication Validation Name 
    /// </summary>
    /// <param name="pObjFormView">FormView</param>
    /// <param name="pObjTextBoxNameToCheckForDuplication">TextBoxName</param>
    /// <param name="pObjLabelDuplicationValidationMessage">Lable Showing Error Message</param>
    /// <param name="pObjDuplicationValidationDelegation">Delegation for validation function (name)</param>
    public clsFormViewDuplicationValidationSetter(FormView pObjFormView, TextBox pObjTextBoxNameToCheckForDuplication, Label pObjLabelDuplicationValidationMessage, DelDuplicationValidationNameOnly pObjDuplicationValidationNameOnly)
    {
        this.FormView = pObjFormView;
        this.TextBoxNameToCheckForDuplication = pObjTextBoxNameToCheckForDuplication;
        this.LabelDuplicationValidationMessage = pObjLabelDuplicationValidationMessage;
        this.DuplicationValidationNameOnly = pObjDuplicationValidationNameOnly;
        FormView.ItemInserting += new FormViewInsertEventHandler(FormView_ItemInserting);
    }
    void FormView_ItemInserting(object sender, FormViewInsertEventArgs e)
    {
        string name = TextBoxNameToCheckForDuplication.Text;

        bool IsDuplicate; 
         // when adding, id always 0
        if (DuplicationValidationDelegationNameAndId != null)
            IsDuplicate = DuplicationValidationDelegationNameAndId(name, 0);
        else
            IsDuplicate = DuplicationValidationNameOnly(name); 
        if (IsDuplicate)
        {
            e.Cancel = true;
            FormView.Visible = true;
            LabelDuplicationValidationMessage.Visible = true;
        }
    }
    #endregion

}

在Form Load

中使用时

    protected void Page_Load(object sender, EventArgs e)
    {
        TextBox objtxtLanguageCode= (TextBox)fmvxLanguage.FindControl("txtLanguageCode");
        Label objFormViewLabelDuplicationValidationMessage = (Label)fmvxLanguage.FindControl("lblFormViewDuplicate");
        clsFormViewDuplicationValidationSetter objFormViewDuplicationValidationSetter = new clsFormViewDuplicationValidationSetter(fmvxLanguage,objtxtLanguageCode,objFormViewLabelDuplicationValidationMessage,LanguageHelper.HaveLanguageCode);
    }

<dxe:ASPxButton ID="btnAddNewLanguage" runat="server" CausesValidation="True" Image-Url="~/images/icon/Save-icon.png" CommandName="Insert" Text="Save" ValidationGroup="V> 
</dxe:ASPxButton> 

<asp:CustomValidator ID="cvdLanguageCodeNameDuplicate" runat="server"                          ControlToValidate="txtLanguageCode" CssClass="IconValidation"                          ErrorMessage="&lt;img src=&quot;/images/icon/validation-Icon.png&quot;/&gt;     Language code name is duplicated."                          onservervalidate="cvdLanguageCodeNameDuplicate_ServerValidate" ValidationGroup="V>    </asp:CustomValidator>