rangevalidator C＃如何稍后在代碼中使用

Question

我創建了一個范圍驗證器，並希望在單擊“提交”按鈕后觸發它。

RangeValidator rv_tbAbsenceDay = new RangeValidator();
rv_tbAbsenceDay.ID = "rv_tbAbsenceDay" + tbAbsenceDay.ID;
rv_tbAbsenceDay.ControlToValidate = tbAbsenceDay.ID;
rv_tbAbsenceDay.EnableClientScript = true;
rv_tbAbsenceDay.Display = ValidatorDisplay.Dynamic;
rv_tbAbsenceDay.MinimumValue = DateTime.Now.AddMonths(-6).ToString("d");
rv_tbAbsenceDay.MaximumValue = DateTime.Now.ToString("d");
rv_tbAbsenceDay.ErrorMessage = "Date cannot be older than 6 months and not in the future.";
rv_tbAbsenceDay.SetFocusOnError = true;
plcMyStaff.Controls.Add(rv_tbAbsenceDay);

plcMyStaff是一個占位符。

<asp:PlaceHolder ID="plcMyStaff" runat="server"></asp:PlaceHolder>

我如何握住創建的范圍驗證器來觸發它，即rv.validate(); ？

我已經試過了：

protected void MarkAsSick_Command(Object sender, CommandEventArgs e)
{
    DropDownList tempddlReason = (DropDownList)plcMyStaff.FindControl("ddlReason" + e.CommandArgument.ToString());
    TextBox temptbAbsenceDay = (TextBox)plcMyStaff.FindControl("tbAbsenceDay" + e.CommandArgument.ToString());
    TextBox temptbLastDayWorked = (TextBox)plcMyStaff.FindControl("tbLastDayWorked" + e.CommandArgument.ToString());
    RangeValidator temprv_tbAbsenceDay = (RangeValidator)plcMyStaff.FindControl("rv_tbAbsenceDay" + e.CommandArgument.ToString());
    temprv_tbAbsenceDay.validate();
...

希望您能夠幫助我。

謝謝，

安迪

Answer 1

首先，要進行調試，我建議您檢查plcMyStaff在其中添加控件的plcMyStaff對象，以查看它是否確實包含您要訪問的控件。

您應該能夠從Webform繼承的Page對象中檢索到它。

Page.FindControl();

// Or you can Iterate through each control to see what the control is called and test for the name you want
foreach (var control in Page.Controls)
{

}