C# 为什么自定义控件的组件没有启动？

我正在制作一个

GenericTable

，作为

GridView

的自定义实现，它将显示插入的任何对象列表的值

要在aspx页面上使用控件，它需要是一个UserControl，因此

GridView

作为组件包含在

通用表中：

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="GenericTable.ascx.cs" Inherits="CASH.WebApplication.Controls.GenericTable" %>
<div style="width: 100%; overflow: scroll">
    <asp:GridView ID="grid" runat="server"></asp:GridView>
</div>

当我尝试激活新创建的
GenericTable
时，在该代码之后，
网格
为空

有没有一种方法可以初始化这个控件位于aspx代码中时发生的相同魔术

更新：可能问题在于如何在回发之间存储表，目前我正在使用会话，也许有更好的方法来记住用户输入？
整个
通用
代码：

using Project.DomainModel.Models;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace CASH.WebApplication.Controls
{
    public partial class GenericTable : UserControl
    {
        private PropertyInfo[] properties;
        //private GridView gridView;
        private DataTable table = new DataTable();
        private Dictionary<int, int> ingedrukt = new Dictionary<int, int>();

        protected void Page_Init(object sender, EventArgs e)
        {
            grid.RowCommand += WeergaveDossiers_RowCommand;
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                for (int i = 0; i < grid.Rows.Count; i++)
                {
                    grid.Rows[i].Cells[0].ColumnSpan = 0;
                }
            }
            else
            {
                properties = (PropertyInfo[])Session["properties"];
                table = (DataTable)Session["table"];
                ingedrukt = (Dictionary<int, int>)Session["ingedrukt"];

                foreach (var knop in ingedrukt)
                {
                    DetailRijToevoegen(knop.Key, knop.Value);
                }
            }

            grid.DataBind();
        }

        protected void SaveInSession()
        {
            Session["properties"] = properties;
            Session["table"] = table;
            Session["ingedrukt"] = ingedrukt;
        }

        protected void WeergaveDossiers_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            int row = int.Parse((string)e.CommandArgument) + 1;
            int col = GetKolomIndex(e.CommandName) + 1;

            if (ingedrukt.ContainsKey(row))
            {
                if (ingedrukt[row] != col)
                {
                    //DetailRijVerwijderen(row);
                    //ingedrukt.Remove(row);
                    //ingedrukt[row] = col;
                }
            }
            else
            {
                ingedrukt[row] = col;
            }

            //DetailRijToevoegen(row, col);
            SaveInSession();
        }

        protected void DetailRijToevoegen(int row, int col)
        {
            var data = table.NewRow();
            var child = new GenericTable();
            child.grid = new GridView();

            data[0] = child;

            table.Rows.InsertAt(data, row);
            grid.DataSource = table;
            grid.DataBind();

            var cells = grid.Rows[row].Cells;
            // Only keep the first cell
            while (cells.Count > 1)
            {
                cells.RemoveAt(1);
            }

            child.MaakTable(new List<object>() { table.Rows[row][col] });

            grid.Columns[0].Visible = true;
            grid.Rows[row].Cells[0].ColumnSpan = table.Columns.Count;
        }

        protected void DetailRijVerwijderen(int row)
        {

        }

        protected int GetKolomIndex(string naam)
        {
            for (int i = 0; i < properties.Length; i++)
            {
                if (properties[i].Name == naam)
                {
                    return i;
                }
            }

            throw new InvalidDataException("Kolom naam " + naam + " niet bekend");
        }

        public void MaakTable(IEnumerable<object> data)
        {
            properties = data.First().GetType().GetProperties().Where(p => p.CanRead).ToArray();

            grid.AutoGenerateColumns = false;
            var details = new BoundField();
            details.DataField = "Details";
            grid.Columns.Add(details);

            table.Columns.Add(new DataColumn("Details", typeof(object)));
            foreach (var veld in properties)
            {
                table.Columns.Add(new DataColumn(veld.Name, (veld.Name == "Id" ? typeof(object) : veld.PropertyType)));
                grid.Columns.Add(MaakKolom(veld));
            }

            foreach (var entry in data)
            {
                var row = table.NewRow();
                int col = 0;

                foreach (var veld in properties)
                {
                    row[++col] = veld.GetValue(entry);
                }

                table.Rows.Add(row);
            }

            grid.DataSource = table;

            SaveInSession();
        }

        protected DataControlField MaakKolom(PropertyInfo veld)
        {
            DataControlField field;

            if (typeof(Entity).IsAssignableFrom(veld.PropertyType))
            {
                field = new ButtonField();
                ((ButtonField)field).DataTextField = veld.Name;
                ((ButtonField)field).ButtonType = ButtonType.Button;
                ((ButtonField)field).CommandName = veld.Name;
            }
            else if (veld.PropertyType == typeof(bool))
            {
                field = new CheckBoxField();
                ((CheckBoxField)field).DataField = veld.Name;
            }
            else if (veld.PropertyType.IsEnum)
            {
                field = new TemplateField();
                //((TemplateField)field).ItemTemplate = (ITemplate)new Label()
                //{
                //  Text = "#DataBinder.Eval(\"" + veld.Name + "\")",
                //};
            }
            else if (veld.PropertyType == typeof(DateTime))
            {
                field = new TemplateField();
                //field.DatePicker = true;
            }
            else
            {
                field = new BoundField();
                ((BoundField)field).DataField = veld.Name;
            }

            field.HeaderText = veld.Name;

            return field;
        }

        protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {

            }
        }
    }
}

使用Project.DomainModel.Models；
使用制度；
使用System.Collections.Generic；
使用系统数据；
使用System.IO；
使用System.Linq；
运用系统反思；
使用System.Web.UI；
使用System.Web.UI.WebControl；
命名空间CASH.WebApplication.Controls
{
公共部分类GenericTable:UserControl
{
私有财产信息[]财产；
//私有GridView GridView；
私有数据表=新数据表（）；
私有字典ingedrukt=新字典（）；
受保护的无效页_Init（对象发送方，事件参数e）
{
grid.RowCommand+=WeergaveDossiers\u RowCommand；
}
受保护的无效页面加载（对象发送方、事件参数e）
{
如果（！IsPostBack）
{
对于（int i=0；i1）
{
去除细胞（1）；
}
MaakTable（新列表（）{table.Rows[row][col]}）；
grid.Columns[0]。Visible=true；
grid.Rows[row]。单元格[0]。ColumnSpan=table.Columns.Count；
}
受保护的无效详细信息rijverwijderen（int行）
{
}
受保护的整数GetKolomIndex（字符串naam）
{
for（int i=0；ip.CanRead.ToArray（）；
grid.AutoGenerateColumns=false；
var details=newboundfield（）；
details.DataField=“details”；
grid.Columns.Add（详细信息）；
table.Columns.Add（新的数据列（“详细信息”，typeof（object）））；
foreach（属性中的变量级别）
{
table.Columns.Add（新数据列（veld.Name，（veld.Name==“Id”？typeof（对象）：veld.PropertyType））；
grid.Columns.Add（MaakKolom（veld））；
}
foreach（数据中的var条目）
{
var row=table.NewRow（）；
int col=0；
foreach（属性中的变量级别）
{
行[++列]=veld.GetValue（条目）；
}
table.Rows.Add（行）；
}
grid.DataSource=表；
SaveInSession（）；
}
受保护的DataControlField MaakKolom（属性信息级别）
{
数据控制字段；
if（typeof（Entity）.IsAssignableFrom（veld.PropertyType））
{
字段=新按钮字段（）；
（（ButtonField）字段）.DataTextField=veld.Name；
（（ButtonField）字段）.ButtonType=ButtonType.Button；
（（ButtonField）字段）.CommandName=veld.Name；
}
else if（veld.PropertyType==typeof（bool））
{
字段=新的CheckBoxField（）；
（（CheckBoxField）字段）.DataField=veld.Name；
}
else if（veld.PropertyType.IsEnum）
{
字段=新模板字段（）；
//（（TemplateField）字段）。ItemTemplate
using Project.DomainModel.Models;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace CASH.WebApplication.Controls
{
    public partial class GenericTable : UserControl
    {
        private PropertyInfo[] properties;
        //private GridView gridView;
        private DataTable table = new DataTable();
        private Dictionary<int, int> ingedrukt = new Dictionary<int, int>();

        protected void Page_Init(object sender, EventArgs e)
        {
            grid.RowCommand += WeergaveDossiers_RowCommand;
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                for (int i = 0; i < grid.Rows.Count; i++)
                {
                    grid.Rows[i].Cells[0].ColumnSpan = 0;
                }
            }
            else
            {
                properties = (PropertyInfo[])Session["properties"];
                table = (DataTable)Session["table"];
                ingedrukt = (Dictionary<int, int>)Session["ingedrukt"];

                foreach (var knop in ingedrukt)
                {
                    DetailRijToevoegen(knop.Key, knop.Value);
                }
            }

            grid.DataBind();
        }

        protected void SaveInSession()
        {
            Session["properties"] = properties;
            Session["table"] = table;
            Session["ingedrukt"] = ingedrukt;
        }

        protected void WeergaveDossiers_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            int row = int.Parse((string)e.CommandArgument) + 1;
            int col = GetKolomIndex(e.CommandName) + 1;

            if (ingedrukt.ContainsKey(row))
            {
                if (ingedrukt[row] != col)
                {
                    //DetailRijVerwijderen(row);
                    //ingedrukt.Remove(row);
                    //ingedrukt[row] = col;
                }
            }
            else
            {
                ingedrukt[row] = col;
            }

            //DetailRijToevoegen(row, col);
            SaveInSession();
        }

        protected void DetailRijToevoegen(int row, int col)
        {
            var data = table.NewRow();
            var child = new GenericTable();
            child.grid = new GridView();

            data[0] = child;

            table.Rows.InsertAt(data, row);
            grid.DataSource = table;
            grid.DataBind();

            var cells = grid.Rows[row].Cells;
            // Only keep the first cell
            while (cells.Count > 1)
            {
                cells.RemoveAt(1);
            }

            child.MaakTable(new List<object>() { table.Rows[row][col] });

            grid.Columns[0].Visible = true;
            grid.Rows[row].Cells[0].ColumnSpan = table.Columns.Count;
        }

        protected void DetailRijVerwijderen(int row)
        {

        }

        protected int GetKolomIndex(string naam)
        {
            for (int i = 0; i < properties.Length; i++)
            {
                if (properties[i].Name == naam)
                {
                    return i;
                }
            }

            throw new InvalidDataException("Kolom naam " + naam + " niet bekend");
        }

        public void MaakTable(IEnumerable<object> data)
        {
            properties = data.First().GetType().GetProperties().Where(p => p.CanRead).ToArray();

            grid.AutoGenerateColumns = false;
            var details = new BoundField();
            details.DataField = "Details";
            grid.Columns.Add(details);

            table.Columns.Add(new DataColumn("Details", typeof(object)));
            foreach (var veld in properties)
            {
                table.Columns.Add(new DataColumn(veld.Name, (veld.Name == "Id" ? typeof(object) : veld.PropertyType)));
                grid.Columns.Add(MaakKolom(veld));
            }

            foreach (var entry in data)
            {
                var row = table.NewRow();
                int col = 0;

                foreach (var veld in properties)
                {
                    row[++col] = veld.GetValue(entry);
                }

                table.Rows.Add(row);
            }

            grid.DataSource = table;

            SaveInSession();
        }

        protected DataControlField MaakKolom(PropertyInfo veld)
        {
            DataControlField field;

            if (typeof(Entity).IsAssignableFrom(veld.PropertyType))
            {
                field = new ButtonField();
                ((ButtonField)field).DataTextField = veld.Name;
                ((ButtonField)field).ButtonType = ButtonType.Button;
                ((ButtonField)field).CommandName = veld.Name;
            }
            else if (veld.PropertyType == typeof(bool))
            {
                field = new CheckBoxField();
                ((CheckBoxField)field).DataField = veld.Name;
            }
            else if (veld.PropertyType.IsEnum)
            {
                field = new TemplateField();
                //((TemplateField)field).ItemTemplate = (ITemplate)new Label()
                //{
                //  Text = "#DataBinder.Eval(\"" + veld.Name + "\")",
                //};
            }
            else if (veld.PropertyType == typeof(DateTime))
            {
                field = new TemplateField();
                //field.DatePicker = true;
            }
            else
            {
                field = new BoundField();
                ((BoundField)field).DataField = veld.Name;
            }

            field.HeaderText = veld.Name;

            return field;
        }

        protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {

            }
        }
    }
}

<asp:GridView runat="server"
    ID="grid"
    AutoGenerateColumns="true" />

if (grid != null)
{
    // Do stuff with grid
}