我希望在RowCreate重新加载之前执行RowCommand或类似的操作

问题描述

|| 我有

<asp:GridView>
<asp:TemplateField HeaderText=\"PsyHealth\">
    <ItemTemplate>
        <asp:PlaceHolder runat=\"server\" ID=\"PsyHealth\" />
    </ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText=\"-\">
    <ItemTemplate>
    <asp:LinkButton ID=\"Gen\" CommandName=\"Gen\" runat=\"server\" Text=\"gen\" />
    </ItemTemplate>
</asp:TemplateField>

和

protected void GridView1_RowCreated(object sender,GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        var dataItem = e.Row.DataItem as ViewModels.UserTestorViewModel;
        var psyHealth = e.Row.FindControl(\"PsyHealth\") as PlaceHolder;
        if (psyHealth != null)
        {
            psyHealth.Controls.Add(dataItem.PsyHeath);
        }
    }
}
protected void GridView1_RowCommand(object sender,GridViewCommandEventArgs e)
{
    //bla bla bla
}

但是当我单击页面上的

Gen

LinkButton

时。首先触发

GridView1_RowCreated

，并由于

e.Row.DataItem

为空而引发错误

Object reference not set to an instance of an object

。 编辑：背后的代码

protected void Page_Load(object sender,EventArgs e)
{
    List<ViewModels.UserTestorViewModel> utViewModelList = new List<ViewModels.UserTestorViewModel> { };

    utViewModelList = utRepo.GetUserTestorViewModelListByHrId();

    this.GridView1.DataSource = utViewModelList;
    this.GridView1.DataBind();

    if (!IsPostBack)
    {
    }
}

protected void Page_Init(object sender,EventArgs e)
{
    GridView1.RowCreated += new GridViewRowEventHandler(GridView1_RowCreated);
}

    

解决方法

您可以在第一次获取utViewModelList时将其存储在Session中吗？如果是这样，则可以从所选行的DataKey值保存的位置获取UserTestorViewModel实例。     ,当您单击gridview中的任何按钮时，页面将回发并在进入

RowCommand

事件之前调用页面加载事件。在页面加载事件中，您将再次绑定gridview，这就是调用ѭ9的原因。 您必须将网格视图绑定到ѭ10下

protected void Page_Load(object sender,EventArgs e)
{

if (!IsPostBack)
{
    List<ViewModels.UserTestorViewModel> utViewModelList = new List<ViewModels.UserTestorViewModel> { };

utViewModelList = utRepo.GetUserTestorViewModelListByHrId();

this.GridView1.DataSource = utViewModelList;
this.GridView1.DataBind();
   }
}

编辑：现在，您发布代码后，我收到了您的问题。 问题出在ѭ12中，您可以从这里删除事件处理程序并尝试以下操作：

protected void Page_Init(object sender,EventArgs e)
{
    GridView1.RowCreated += new GridViewRowEventHandler(GridView1_RowCreated);
}

在这里添加

<asp:GridView  onrowcreated=\"GridView1_RowCreated\">