DataGridViewColumn.DataPropertyName属性 [英] DataGridViewColumn.DataPropertyName Property

问题描述

我有一个DataGridView控件，我想用数据填充。

我使用DataSource属性

  // dgvDealAsset是DataGridView 
 private void DealAssetListControl_Load（object sender，EventArgs e）
 {
 dgvDealAssets.AutoGenerateColumns = false; 
 dgvDealAssets.DataSource = DealAssetList.Instance.Values.ToList（）; 
} 
  

现在问题第一。我的集合的类不包含只能使用DataPropertyName映射到列的简单类型。这是集合中包含的类。

  class MyClass 
 {
 public String Name; 
 MyOtherClass otherclass; 
} 
 
 class MyOtherClass 
 {
 public String Name; 
} 
  

现在我将MyClass的属性绑定到列

  col1.DataPropertyName =Name// Ok 
 col2.DataPropertyName =otherclass//不行 - 我将有空单元格
  

问题是我要显示otherclass.Name字段。但是如果我尝试写

  col2.DataPropertyName =otherclass.Name
  

我得到空单元格。

我尝试手动设置列

  private void DealAssetListControl_Load（object sender，EventArgs e）
 {
 dgvDealAssets.AutoGenerateColumns = false; 
 dgvDealAssets.DataSource = DealAssetList.Instance.Values.ToList（）; 
 
 //通过行迭代并手动设置列
 foreach（dgvDealAssets.Rows中的DataGridViewRow行）
 {
 row.Cells [Column2]。 =（（DealAsset）row.DataBoundItem）.otherclass.Name; 
} 
  

但是这个foreach周期需要几分钟才能完成（2k个元素）。如何解决这个问题？

解决方案

DataGridView不支持数据绑定到子属性。有关更多信息，请查看这篇文章

我喜欢使用CellFormatting事件的解决方案。

I have a DataGridView control and I want to populate it with data.

I use DataSource property

// dgvDealAsset is DataGridView
        private void DealAssetListControl_Load(object sender, EventArgs e)
        {
            dgvDealAssets.AutoGenerateColumns = false;
            dgvDealAssets.DataSource = DealAssetList.Instance.Values.ToList();
}

Now problem number one. The class of my collection does not contain only simple types that I can map to columns using DataPropertyName. This is the class that is contained in collection.

class MyClass
{
  public String Name;
  MyOtherClass otherclass;
}

class MyOtherClass
{
 public String Name;
}

Now I am binding properties of MyClass to columns

col1.DataPropertyName = "Name"  // Ok 
col2.DataPropertyName = "otherclass" // Not OK - I will have empty cell

The problem is that I want to display otherclass.Name field. But if I try to write

col2.DataPropertyName = "otherclass.Name" 

I get empty cell.

I tried to manually set the column

private void DealAssetListControl_Load(object sender, EventArgs e)
{
    dgvDealAssets.AutoGenerateColumns = false;
    dgvDealAssets.DataSource = DealAssetList.Instance.Values.ToList();

// iterate through rows and set the column manually
        foreach (DataGridViewRow row in dgvDealAssets.Rows)
        {
            row.Cells["Column2"].Value = ((DealAsset)row.DataBoundItem).otherclass.Name;
        }

But this foreach cycle takes about minute to complete (2k elements). How to solve this problem?

解决方案

DataGridView doesn't support databinding to child properties. For more info, check this post

I like the solution that uses the CellFormatting event.

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