Question

我正在处理c＃应用程序，我收到此错误。

这是Stack Track of error：

堆栈跟踪：在System.Guid.GuidResult.SetFailure（ParseFailureKind失败，String failureMessageID，Object failureMessageFormatArgument，String failureArgumentName，Exception innerException）at System.Guid.TryParseGuid（String g，GuidStyles flags，GuidResult＆amp; 结果）在System.Guid..ctor（String g）at Projects_AddProject.wizCreateProject_ActiveStepChanged（对象发送者， EventArgs e）at System.Web.UI.WebControls.Wizard.OnActiveStepChanged（Object source， EventArgs e）at System.Web.UI.WebControls.Wizard.MultiViewActiveViewChanged（对象来源，EventArgs e）at System.Web.UI.WebControls.MultiView.OnActiveViewChanged（EventArgs e）在System.Web.UI.WebControls.MultiView.set_ActiveViewIndex（Int32 System.Web.UI.WebControls.Wizard.set_ActiveStepIndex（Int32。）在Projects_AddProject.proxy_Navigate（对象发送者， HistoryEventArgs e）at System.Web.UI.ScriptManager.RaiseNavigate（HistoryEventArgs e）at System.Web.UI.ScriptManager.LoadHistoryState（String serverState）at System.Web.UI.ScriptManager.RaisePostBackEvent（String eventArgument）在 System.Web.UI.ScriptManager.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent（字符串 eventArgument）

从将字符串转换为guid时发生的错误。发生这种情况的方法是wizCreateProject_ActiveStepChanged。它看起来有些Guid Conversion问题。

以下是生成错误的方法：

protected void wizCreateProject_ActiveStepChanged(object sender, EventArgs e)
    {
              switch (wizCreateProject.ActiveStepIndex)
        {
                       case 0:
                if (rbFrmTemp.Checked)
                {
                    int tenantID = TenantUtils.getTenantId(Page);
                    EzProject templateProject = DBAccessProjects.GetProject(tenantID, new Guid(ddlProjTemplates.SelectedValue));

                    txNme.Text = templateProject.ProjectName;
                    txDesc.Text = templateProject.ProjectDescription;
                    CheckLoadWorkType(tenantID, ddlWrkType);

                    if (templateProject.WorkTypeID != null)
                    {
                        ListItem workItem = ddlWrkType.Items.FindByValue(templateProject.WorkTypeID.ToString());
                        if (workItem != null)
                        {
                            ddlWrkType.SelectedValue = templateProject.WorkTypeID.ToString();
                        }
                    }

                    if (templateProject.ProjectType == (int)ProjectType.Reoccurring)
                    {
                        CheckGroupedRadioButton(rbReoccurring);
                        txBilFreq.Text = templateProject.BillingFrequency.ToString();
                        if (templateProject.LastDate != null)
                        {
                            txtDate.Text = ((DateTime)templateProject.LastDate).ToShortDateString();
                        }
                        ListItem prdItem = ddlBilPrd.Items.FindByValue(templateProject.BillingPeriod);
                        if (prdItem != null)
                        {
                            ddlBilPrd.SelectedValue = prdItem.Value;
                        }
                        ScriptManager.RegisterClientScriptBlock(upPnlProject, typeof(UpdatePanel), upPnlProject.ClientID, "TypeChanged();", true);

                        wizCreateProject.ActiveStepIndex = 2;
                    }
                    else
                    {
                        wizCreateProject.ActiveStepIndex = 3;
                    }
                    BtnADD.Visible = true;
                }
                else
                {
                    if (rbReoccurring.Checked)
                    {
                        ScriptManager.RegisterClientScriptBlock(upPnlProject, typeof(UpdatePanel), upPnlProject.ClientID, "TypeChanged();", true);
                    }
                }
                break;
            case 3:
                txNme.Focus();
                ScriptManager.RegisterClientScriptBlock(upPnlProject, typeof(UpdatePanel), upPnlProject.ClientID, "InitNames();", true);
                break;
            default:
                break;
        }
    }

Answer 1

错误在于：

EzProject templateProject 
         = DBAccessProjects.GetProject(tenantID, new Guid(ddlProjTemplates.SelectedValue));

你可以看到Guid构造函数内部正在使用Guid.TryParse()，这就是你应该做的事情。我会在ddlProjTemplates中添加一个验证器来使它成为必需的，你还需要确保它只包含有效的Guids。

无法识别的Guid格式

1 个答案: