c# - 将 asp.net 窗体 View 更改为从另一个页面插入模式

Question

我有 2 个用 ASP.NET Web Froms 编写的 ASP.NET 页面。 在第 1 页上，我有主 GridView 控件。在第 2 页上，我在 From View 控件中列出了详细信息。

我在第 1 页上有一个按钮。单击按钮。我想改变 从查看模式到插入。有什么办法可以做到吗？

我的代码如下:

第 1 页:ASPX 页面:按钮和 GridView

<asp:Panel ID="pnl" runat="server">
        <table>
            <tr>
                <td>
                    <asp:Button ID="btnNewIssue" Text="Create New Issue" runat="server" OnClick="btnNewIssue_Click" />
                </td>
            </tr>
</table>
</asp:Panel>
 <asp:Panel>
    <asp:GridView ID="gvTasks" runat ="server">
Grid View Code--------------------------------
</asp:GridView>
</asp:Panel>

第 2 页:ASPX.CS 页面:

 protected void btnNewIssue_Click(object sender, EventArgs e)
        {
            int index = 0;

            What should go here ????



        }

 protected void gvTasks_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            if (e.CommandName == "Details")
            {
                int index = Convert.ToInt32(e.CommandArgument);

                StringBuilder sb = new StringBuilder();
                sb.Append("~/Details.aspx?TaskID=");
                sb.Append(index);

                Response.Redirect(sb.ToString());

                //Response.Redirect("~/Details.aspx?TaskID=1234");

            }

    }

第 2 页:aspx 表单 View

<asp:FormView ID="FormView1" runat="server">
<ItemTemplate>
---Item Template Code....
</ItemTemplate>
<EditItemTemplate>
--- Edit Item Template Code....
</EditItemTemplate>
<InsertItemTemplate>
--- Insert Item Template Code....
</InsertItemTemplate>
</asp:FormView>

第 2 页:aspx.cs

protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {

                FillFormView();
            }
        }

   private void FillFormView()
        {
           int taskid = int.Parse(Request.QueryString["TaskID"]);

            ----- Fetch dlist from Service based on taskid-----
            FormView1.DataSource = dlist;
            FormView1.DataBind();
}



protected void FormView1_ModeChanging(Object sender, FormViewModeEventArgs e)
        {

            if (e.NewMode == FormViewMode.Edit)
            {
                Label lblTaskId = ((Label)FormView1.FindControl("lblTaskID"));
                Label lblTaskTitle = ((Label)FormView1.FindControl("lblTaskTitle"));   
                FormView1.ChangeMode(e.NewMode);
                FillFormView();
            }
            else
            {
                FormView1.ChangeMode(e.NewMode);
                FillFormView();
            }


        }

Answer 1

改变你的FillFormView函数

private void FillFormView()
    {

       var taskId = Request.QueryString["TaskID"];

       if (taskId == null){
           FormView1.ChangeMode(FormViewMode.Insert);
           return;
       }

       FormView1.ChangeMode(FormViewMode.Edit);
       /// dlist from Service based on taskid-----
       FormView1.DataSource = dlist;
        FormView1.DataBind();
}

FormView1_ModeChanging 函数不需要。

还有一件事，使用 string.Format 而不是 StringBuilder 类

protected void gvTasks_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "Details")
        {
            int index = Convert.ToInt32(e.CommandArgument);
            Response.Redirect(string.Format("~/Details.aspx?TaskID={0}", index));
            //Response.Redirect("~/Details.aspx?TaskID=1234");

        }

}