发布新产品时，在产品描述里添加图片，上传发送到服务器，点击后没反应，发送不了~
不加图片直接提交，出现提示：
Server Error in '/' Application.
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Could not find any recognizable digits.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.FormatException: Could not find any recognizable digits.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[FormatException: Could not find any recognizable digits.]
System.ParseNumbers.StringToInt(String s, Int32 radix, Int32 flags, Int32* currPos) +0
System.Convert.ToInt32(String value, Int32 fromBase) +30
System.ComponentModel.Int32Converter.FromString(String value, Int32 radix) +30
System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value) +417
[Exception: #nannannan is not a valid value for Int32.]
System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value) +516
System.ComponentModel.TypeConverter.ConvertFromString(ITypeDescriptorContext context, CultureInfo culture, String text) +16
System.Drawing.ColorConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value) +1038288
System.ComponentModel.TypeConverter.ConvertFromString(String text) +12
System.Drawing.ColorTranslator.FromHtml(String htmlColor) +674
PageAdmin.Watermark.Add_Watermark(String Path) +1694
PageAdmin.product_2.xd24f219441cf2f66() +2331
PageAdmin.product_2.Page_Load(Object src, EventArgs e) +188
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
这问题怎么解决，请懂得人帮帮忙，谢谢啦！
