使用System.FormatException后接收ClientScript

Question

我试图使用以下代码为GridView编写onclick行为代码：

protected void gridProcesses_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        e.Row.Attributes["onmouseover"] = "this.style.cursor='hand';";
        e.Row.Attributes["onmouseout"] = "this.style.textDecoration='none';";
        e.Row.Attributes["onclick"] = ClientScript.GetPostBackClientHyperlink(this.gridProcesses, "SelectProcess$" + e.Row.Cells[0].Text);
    }
}

protected override void Render(HtmlTextWriter writer)
{
    foreach(GridViewRow row in gridProcesses.Rows)
    {
        if (row.RowType == DataControlRowType.DataRow)
            this.ClientScript.RegisterForEventValidation(this.gridProcesses.UniqueID, "SelectProcess$" + row.Cells[0].Text);
    }
    base.Render(writer);
}

protected void gridProcesses_RowCommand(object sender, GridViewCommandEventArgs e)
{
    if (e.CommandName == "SelectProcess")
    {
       //do stuff after click on gridviewrow
    }
}

编译并单击GridViewRow之后，将调用我的gridProcesses_RowCommand并输入"if"，因为SelectProcess是以CommandName的形式传递的，我在该代码中所做的任何操作都是有效的，但是在抛出以下错误之后，程序就会停止工作：

System.Web.HttpUnhandledException (0x80004005): Eine Ausnahme vom Typ "System.Web.HttpUnhandledException" wurde ausgelöst. ---> System.FormatException: Input string was not in a correct format.
   bei System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   bei System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   bei System.Convert.ToInt32(String value, IFormatProvider provider)
   bei System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup)
   bei System.Web.UI.WebControls.GridView.RaisePostBackEvent(String eventArgument)
   bei System.Web.UI.WebControls.GridView.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
   bei System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
   bei System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
   bei System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   bei System.Web.UI.Page.HandleError(Exception e)
   bei System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   bei System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   bei System.Web.UI.Page.ProcessRequest()
   bei System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
   bei System.Web.UI.Page.ProcessRequest(HttpContext context)
   bei ASP.processes_aspx.ProcessRequest(HttpContext context) in c:\Users\roett04\AppData\Local\Temp\Temporary ASP.NET Files\root\4c906b5d\4377a67f\App_Web_qcvmvpfq.0.cs:Zeile 0.
   bei System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   bei System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

如果我添加一个SelectButton并使用OnSelectedIndexChanging，而不是覆盖呈现方法和使用行数据库添加onclick-处理程序，相同的代码就能正常工作。

Answer 1

GridView控件支持使用事件的CommandArgument属性作为页码的Page命令。在转换此属性时，它似乎失败了。

您是否有可能在e.CommandArgument块之外为if分配一些东西？如果是这样的话，就不应该这样做，因为它会影响SelectProcess以外的其他命令。