Question

我正在尝试使用以下代码隐藏代码为GridView编写onclick行为：

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后，我的gridProcesses_RowCommand被调用并输入“if”，因为SelectProcess是作为CommandName传递的，无论我在该代码中尝试做什么，但是之后程序在抛出之后才停止工作以下错误：

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render-method并使用rowdatabound添加onclick-handler，那么相同的代码可以正常工作。

Answer 1

GridView控件支持Page命令，该命令可以使用事件的CommandArgument属性作为页码。转换此属性时似乎失败了。

您是否真的在e.CommandArgument区块的if 外分配了一些内容？如果是这种情况，则不应该这样做，因为它会影响SelectProcess以外的命令。

使用ClientScript后接收System.FormatException

1 个答案: