Question

我是新的ASP.NET WebForms开发人员，我正在努力验证数据输入表单。我应该只使用服务器端验证，它必须使用纯C＃。我想知道是否有一种最好的方法来验证以下形式，而不是有多个嵌套的if-else语句，这会造成混淆并使代码很难理解。

ASP.NET表单：

<div class="form-horizontal">

                <div class="form-group">

                    <label class="control-label col-xs-2">Type</label>

                    <div class="col-xs-4">

                        <asp:TextBox ID="txtType" runat="server"></asp:TextBox>

                    </div>

                    <label class="control-label col-xs-2">Category</label>

                    <div class="col-xs-4">

                        <asp:TextBox ID="txtCategory" runat="server"></asp:TextBox>

                    </div>

                </div>

                <div class="form-group">

                    <label class="control-label col-xs-2">Item</label>

                    <div class="col-xs-10">

                        <asp:DropDownList ID="ddlItem" runat="server"></asp:DropDownList>

                    </div>

                </div>

                <div class="form-group">

                    <label class="control-label col-xs-2">Issue</label>

                    <div class="col-xs-10">

                        <asp:TextBox ID="txtIssue" runat="server"></asp:TextBox>

                    </div>

                </div>

                <div class="form-group">

                    <label class="control-label col-xs-2">Suggestion</label>

                    <div class="col-xs-10">

                        <asp:TextBox ID="txtSuggestion" runat="server"></asp:TextBox>

                    </div>

                </div>



                <div class="form-group">

                    <label class="control-label col-xs-2">Reference</label>

                    <div class="col-xs-10">

                        <asp:TextBox ID="txtReference" runat="server"></asp:TextBox>

                    </div>

                </div>

                <div class="form-group">

                    <label class="control-label col-xs-2">Priority</label>

                    <div class="col-xs-10">

                        <asp:DropDownList ID="ddlPriority" runat="server"></asp:DropDownList>

                    </div>

                </div>

</div>

我目前验证表单的方法是使用if-else语句，例如：

 string type = string.Empty;

            string category = string.Empty;

            string issue = string.Empty

            string suggestion = string.Empty;

            string Reference = string.Empty;





            if (!string.IsNullOrWhiteSpace(txtType.Text))

    {

        type = txtType.Text.Trim();

        if (!string.IsNullOrWhiteSpace(txtCategory.Text))

        {

                            category = txtCategory.Text.Trim();

                            if(!string.IsNullOrWhiteSpace(txtIssue.Text))

                            {

                               issue = txtIssue.Text.Trim();

                               if(!string.IsNullOrWhiteSpace(txtSuggestion.Text))

                               {

                                  suggestion = txtSuggestion.Text.Trim();

                            try

                            {

                            //to do the operation

                            }

                            catch (Exception ex)

                            {

                                            throw ex;

                            }

                               }

                               else

                               {

                                  lblMessage.CssClass = "text-error";

                                  lblMessage.Text = Encoder.HtmlEncode("Please fill out the Suggestion!");                    

                               }

                            }

                            else

                            {

                               lblMessage.CssClass = "text-error";

                               lblMessage.Text = Encoder.HtmlEncode("Please fill out the Issue!");

                            }

        }

        else

        {

            lblMessage.CssClass = "text-error";

            lblMessage.Text = Encoder.HtmlEncode("Please fill out the Category!");

        }

    }

    else

    {

        lblMessage.CssClass = "text-error";

        lblMessage.Text = Encoder.HtmlEncode("Please fill out the Type!");

    }

它运作良好，但我认为它很长，它会造成混乱并使代码很难理解。 在执行操作之前，能否通过向我展示验证所有输入（或数据输入）的最佳方法来帮助我？

Answer 1

您可以使用Visual Studio工具箱中的ASP.NET验证控件：

RequiredFieldValidator

CompareValidator

RangeValidator控件

RegularExpressionValidator

CustomValidator

DynamicValidator

的ValidationSummary

来自Exploring ASP.NET Validation Controls

我的建议：RequiredFieldValidator控件，它检查输入控件是否输入了数据。您可以为要强制执行强制字段规则的每个表单元素设置RequiredFieldValidator控件。

<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" Style="top: 98px;
        left: 367px; position: absolute; height: 26px; width: 162px" ErrorMessage="password required"
        ControlToValidate="TextBox2"></asp:RequiredFieldValidator>

另请参阅：How to use the ASP.NET Validation Control to validate the user input

Answer 2

考虑使用模型验证。例如：

[Required]
[StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
[DataType(DataType.Password)]
[Display(Name = "Password")]
public string Password { get; set; }

如何在ASP.NET Web窗体中验证此数据输入表单？

2 个答案: