如何将父子级数据加载到datagridview？ [英] How to load parent child level data to datagridview?

问题描述

Hi All,

I have datasource which implements child and parent level options implemented with 2 inner classes. When i load the data to the dataGridView , the grid is empty. 



Here is the code.

    public class ViewModel : INotifyPropertyChanged
    {
    private const int NUM_LEVEL1 = 500;
    private const int NUM_LEVEL2_EACH_LEVEL = 6;

    public List<Level1Item> Level1Items
    {
        get { return _level1Items; }
    }

    private readonly List<Level1Item> _level1Items = new List<Level1Item>();

    public ViewModel()
    {
        for (int lv1Index = 0; lv1Index < NUM_LEVEL1; lv1Index++)
        {
            var newLv1Item = new Level1Item
            {
                Status = "300-INTQUA - International Quarterback Pty Ltd",
                Currency = "AUD",
                Amount = "$9,942.11",
                Underwriter = "Fitness Centre Scheme",
                Level2Items = new List<Level2Item>(),
            };

            for (int lv2Index = 0; lv2Index < NUM_LEVEL2_EACH_LEVEL; lv2Index++)
            {
                var newLv2Item = new Level2Item
                {
                    Status = "Outstanding " + lv1Index + "/" + lv2Index,
                    Transaction = "300-0166574",
                    Date = "15/11/2016",
                    Type = "Renew",
                    Description = "039246 Industrial Special",
                    Effective = "01/12/2016",
                    Currency = "AUD",
                    Amount = "$10,887.00",
                    Underwriter = "QBE Insurance (Australia) Ltd",
                };
                newLv1Item.Level2Items.Add(newLv2Item);
                newLv2Item.PropertyChanged += newLv2Item_PropertyChanged;
            }

            _level1Items.Add(newLv1Item);
        }
    }

    void newLv2Item_PropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(e.PropertyName));
    }

    public class Level1Item : INotifyPropertyChanged
    {
        public List<Level2Item> Level2Items
        {
            get;
            set;
        }

        private bool _doDispatch;
        public bool DoDispatch
        {
            get { return _doDispatch; }
            set
            {
                _doDispatch = value;
                
                // Other business logic goes here..

                Level2Items.ForEach(item => item.DoDispatch = value);
                
                if (value)
                {
                    Level2Items.ForEach(item => item.DoAbandon = false);
                }

                OnPropertyChanged("DoDispatch");
            }
        }

        private bool _doAbandon;
        public bool DoAbandon
        {
            get { return _doAbandon; }
            set
            {
                _doAbandon = value;

                // Other business logic goes here..
                
                Level2Items.ForEach(item => item.DoAbandon = value);

                if (value)
                {
                    Level2Items.ForEach(item => item.DoDispatch = false);
                }

                OnPropertyChanged("DoAbandon");
            }
        }

        public bool DoDispatchPremiumFundingQuote
        {
            get;
            set;
        }

        public bool DoEmail
        {
            get;
            set;
        }

        public bool DoPrint
        {
            get;
            set;
        }

        public string Status
        {
            get;
            set;
        }

        public string Currency
        {
            get;
            set;
        }
        public string Amount
        {
            get;
            set;
        }
        public string Underwriter
        {
            get;
            set;
        }

        public void OnPropertyChanged(string name)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(name));
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }

    public class Level2Item : INotifyPropertyChanged
    {
        private bool _DoDispatch;
        public bool DoDispatch
        {
            get { return _DoDispatch; }
            set
            {
                _DoDispatch = value;
                OnPropertyChanged("DoDispatch");
            }
        }

        internal void UpdateDispatch(bool dispatch)
        {
            // Other business logic omitted here..

            DoDispatch = dispatch;
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs("DoDispatch"));
            }
        }

        private bool _DoAbandon;
        public bool DoAbandon
        {
            get { return _DoAbandon; }
            set
            {
                _DoAbandon = value;
                OnPropertyChanged("DoAbandon");
            }
        }

        internal void UpdateAbandon(bool abandon)
        {
            // Other business logic omitted here..

            DoAbandon = abandon;
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs("DoAbandon"));
            }
        }

        public string Status
        {
            get;
            set;
        }

        public string Transaction
        {
            get;
            set;
        }

        public string Date
        {
            get;
            set;
        }

        public string Type
        {
            get;
            set;
        }

        public string Description
        {
            get;
            set;
        }

        public string Effective
        {
            get;
            set;
        }

        public string Currency
        {
            get;
            set;
        }

        public string Amount
        {
            get;
            set;
        }

        public string Underwriter
        {
            get;
            set;
        }

        public void OnPropertyChanged(string name)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(name));
        }
        public event PropertyChangedEventHandler PropertyChanged;
    }

    public event PropertyChangedEventHandler PropertyChanged;
    }


Could any one share me what i have done in this to load the child data?

Appreciate your response.

Regards,
Amal 

我尝试过：



1）this.dataGridView1.DataSource = new ViewModel（）;使用这样的网格是空的。



2）this.dataGridView1.DataSource = new ViewModel（）。Level1Items;第一级数据仅加载到网格。



这里Level1items是包含父数据的列表集合和包含子数据的集合。但网格仅加载1级数据。

What I have tried:

1) this.dataGridView1.DataSource = new ViewModel(); the grid is empty when using like this.

2)this.dataGridView1.DataSource = new ViewModel().Level1Items; the first level of data are only loaded to grid.

Here the Level1items is the list collection contains the parent data and a collection which contains the child data. But the grid loads the level 1 datas only.

推荐答案

9,942.11，
Underwriter = 健身中心计划，
Level2Items = 新列表< Level2Item>（ ），
};

for （ int lv2Index = < span class =code-digit> 0 ; lv2Index < NUM_LEVEL2_EACH_LEVEL; lv2Index ++）
{
var newLv2Item = new Level2Item
{
Status = Outstanding + lv1Index + / + lv2Index，
Transaction = 300-0166574，
Date = 15/11/2016，
Type = 续订，
说明= 039246 Industrial Special，
Effective = 2016/12/01，
货币= AUD，
金额=

9,942.11", Underwriter = "Fitness Centre Scheme", Level2Items = new List<Level2Item>(), }; for (int lv2Index = 0; lv2Index < NUM_LEVEL2_EACH_LEVEL; lv2Index++) { var newLv2Item = new Level2Item { Status = "Outstanding " + lv1Index + "/" + lv2Index, Transaction = "300-0166574", Date = "15/11/2016", Type = "Renew", Description = "039246 Industrial Special", Effective = "01/12/2016", Currency = "AUD", Amount = "

10,887.00，
Underwriter = QBE Insurance（Australia）Ltd，
};
newLv1Item.Level2Items.Add（newLv2Item）;
newLv2Item.PropertyChanged + = newLv2Item_PropertyChanged;
}

_level1Items.Add（newLv1Item）;
}
}

void newLv2Item_PropertyChanged（ object sender，PropertyChangedEventArgs e）
{
if （PropertyChanged！= null ）
PropertyChanged（ this ， new PropertyChangedEventArgs（e.PropertyName））;
}

public class Level1Item：INotifyPropertyChanged
{
public 列表< Level2Item> Level2Items
{
get ;
set ;
}

private bool _doDispatch;
public bool DoDispatch
{
get { return _doDispatch; }
set
{
_doDispatch = value ;

// 其他业务逻辑就在这里..

Level2Items.ForEach（item = > item.DoDispatch = value ）;

if （ value ）
{
Level2Items .ForEach（item = > item.DoAbandon = false ）;
}

OnPropertyChanged（ DoDispatch）;
}
}

私人 bool _doAbandon;
public bool DoAbandon
{
get { return _doAbandon; }
set
{
_doAbandon = value ;

// 其他业务逻辑就在这里..

Level2Items.ForEach（item = > item.DoAbandon = value ）;

if （ value ）
{
Level2Items .ForEach（item = > item.DoDispatch = false ）;
}

OnPropertyChanged（ DoAbandon）;
}
}

public bool DoDispatchPremiumFundingQuote
{
get ;
set ;
}

public bool DoEmail
{
get ;
set ;
}

public bool DoPrint
{
get ;
set ;
}

public string 状态
{
get ;
set ;
}

public string 货币
{
get ;
set ;
}
public string 金额
{
< span class =code-keyword> get ;
set ;
}
public string 包销商
{
< span class =code-keyword> get ;
set ;
}

public void OnPropertyChanged（ string name）
{
if （PropertyChanged！= null ）
PropertyChanged（ this ， new PropertyChangedEventArgs（name））;
}

public event PropertyChangedEventHandler PropertyChanged;
}

public class Level2Item：INotifyPropertyChanged
{
private bool _DoDispatch;
public bool DoDispatch
{
get { return _DoDispatch; }
set
{
_DoDispatch = value ;
OnPropertyChanged（ DoDispatch）;
}
}

内部 void UpdateDispatch（ bool dispatch）
{
// 此处省略了其他业务逻辑..

DoDispatch = dispatch;
if （PropertyChanged！= null ）
{
PropertyChanged（ 此， new PropertyChangedEventArgs（ DoDispatch））;
}
}

private bool _DoAbandon;
public bool DoAbandon
{
get { return _DoAbandon; }
set
{
_DoAbandon = value ;
OnPropertyChanged（ DoAbandon）;
}
}

内部 void UpdateAbandon（ bool 放弃）
{
// 此处省略了其他业务逻辑..

DoAbandon =放弃;
if （PropertyChanged！= null ）
{
PropertyChanged（ 此， new PropertyChangedEventArgs（ DoAbandon））;
}
}

public string 状态
{
get ;
set ;
}

public string 交易
{
get ;
set ;
}

public string 日期
{
get ;
set ;
}

public string 输入
{
get ;
set ;
}

public string 描述
{
get ;
set ;
}

public string 有效
{
get ;
set ;
}

public string 货币
{
get ;
set ;
}

public string 金额
{
get ;
set ;
}

public string 承销商
{
get ;
set ;
}

public void OnPropertyChanged（ string name）
{
if （PropertyChanged！= null ）
PropertyChanged（ this ， new PropertyChangedEventArgs（name））;
}
public event PropertyChangedEventHandler PropertyChanged;
}

public event PropertyChangedEventHandler PropertyChanged;
}


任何人都可以分享我的工作 这个加载子数据？

感谢您的回复。

问候，
Amal

10,887.00", Underwriter = "QBE Insurance (Australia) Ltd", }; newLv1Item.Level2Items.Add(newLv2Item); newLv2Item.PropertyChanged += newLv2Item_PropertyChanged; } _level1Items.Add(newLv1Item); } } void newLv2Item_PropertyChanged(object sender, PropertyChangedEventArgs e) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(e.PropertyName)); } public class Level1Item : INotifyPropertyChanged { public List<Level2Item> Level2Items { get; set; } private bool _doDispatch; public bool DoDispatch { get { return _doDispatch; } set { _doDispatch = value; // Other business logic goes here.. Level2Items.ForEach(item => item.DoDispatch = value); if (value) { Level2Items.ForEach(item => item.DoAbandon = false); } OnPropertyChanged("DoDispatch"); } } private bool _doAbandon; public bool DoAbandon { get { return _doAbandon; } set { _doAbandon = value; // Other business logic goes here.. Level2Items.ForEach(item => item.DoAbandon = value); if (value) { Level2Items.ForEach(item => item.DoDispatch = false); } OnPropertyChanged("DoAbandon"); } } public bool DoDispatchPremiumFundingQuote { get; set; } public bool DoEmail { get; set; } public bool DoPrint { get; set; } public string Status { get; set; } public string Currency { get; set; } public string Amount { get; set; } public string Underwriter { get; set; } public void OnPropertyChanged(string name) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(name)); } public event PropertyChangedEventHandler PropertyChanged; } public class Level2Item : INotifyPropertyChanged { private bool _DoDispatch; public bool DoDispatch { get { return _DoDispatch; } set { _DoDispatch = value; OnPropertyChanged("DoDispatch"); } } internal void UpdateDispatch(bool dispatch) { // Other business logic omitted here.. DoDispatch = dispatch; if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs("DoDispatch")); } } private bool _DoAbandon; public bool DoAbandon { get { return _DoAbandon; } set { _DoAbandon = value; OnPropertyChanged("DoAbandon"); } } internal void UpdateAbandon(bool abandon) { // Other business logic omitted here.. DoAbandon = abandon; if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs("DoAbandon")); } } public string Status { get; set; } public string Transaction { get; set; } public string Date { get; set; } public string Type { get; set; } public string Description { get; set; } public string Effective { get; set; } public string Currency { get; set; } public string Amount { get; set; } public string Underwriter { get; set; } public void OnPropertyChanged(string name) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(name)); } public event PropertyChangedEventHandler PropertyChanged; } public event PropertyChangedEventHandler PropertyChanged; } Could any one share me what i have done in this to load the child data? Appreciate your response. Regards, Amal

我尝试过：



1）this.dataGridView1.DataSource = new ViewModel（）;使用这样的网格是空的。



2）this.dataGridView1.DataSource = new ViewModel（）。Level1Items;第一级数据仅加载到网格。



这里Level1items是包含父数据的列表集合和包含子数据的集合。但是网格仅加载1级数据。

What I have tried:

1) this.dataGridView1.DataSource = new ViewModel(); the grid is empty when using like this.

2)this.dataGridView1.DataSource = new ViewModel().Level1Items; the first level of data are only loaded to grid.

Here the Level1items is the list collection contains the parent data and a collection which contains the child data. But the grid loads the level 1 datas only.

这篇关于如何将父子级数据加载到datagridview？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！