What cause this DataTable.ImportRow()'s failure?

Question

 for (int i = 0; i < P5.Rows.Count; i++)  
        {  
            var dr = P5.Rows[i];  (※※※※)  
            if ((bool)dr[0])  
            {  
                dt.ImportRow(dr);  
            }  
        }  

I paused the program at line(※※※※), then executed importRow in the watch screen. Strange things happened: only the bool is different from the source!

===========
first added testing code===========

            DataTable original;  
            DataTable filtered;  
            private void button2_Click(object sender, EventArgs e)  
            {  
                original = new DataTable();  
                original.Columns.Add("bool", typeof(bool));  
                original.Columns.Add("column1", typeof(string));  
      
                for(int i=0; i<5; i++)  
                {  
                    DataRow dr = original.NewRow();  
                    dr[0] = true;  
                    dr[1] = i.ToString();  
                    original.Rows.Add(dr);  
                }  
                dataGridView1.DataSource = original;  
            }  
      
            private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)  
            {  
                dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);  
                Filter();  
                dataGridView2.DataSource = filtered;  
            }  
      
 void Filter()  
        {  
            DataTable dt = original.Clone();  
            for (int i = 0; i < original.Rows.Count; i++)  
            {  
                var dr = original.Rows[i];  
  
                if ((bool)dr[0])  
                {  
                    dt.ImportRow(dr);  
                }  
            }  
            filtered = dt;  
        }  
  
  

Demo
https://1drv.ms/u/s!AuN7KXeC80B9mVpNf88ji14QEuR0?e=Gts4Ls

Answer 1

Try this code:

private void dataGridView1_CellContentClick( object sender, DataGridViewCellEventArgs e )
{
    dataGridView1.CommitEdit( DataGridViewDataErrorContexts.Commit );
    dataGridView1.BindingContext[dataGridView1.DataSource].EndCurrentEdit( );
    Filter( );
    dataGridView2.DataSource = filtered;
}

Answer 2

Hi Chenbinhao,
Based on your description, I made a test with the following code and it worked fine.
So could you provide more related code to reproduce the situation.
Here is my test code:

DataTable t = new DataTable();  
DataTable dt = new DataTable();  
private void Form1_Load(object sender, EventArgs e)  
{  
           
    t.Columns.Add(new DataColumn("Col1", typeof(bool)));  
    t.Columns.Add(new DataColumn("Col2", typeof(int)));  
    t.Columns.Add(new DataColumn("Col3", typeof(int)));  
    dt.Columns.Add(new DataColumn("Col1", typeof(bool)));  
    dt.Columns.Add(new DataColumn("Col2", typeof(int)));  
    dt.Columns.Add(new DataColumn("Col3", typeof(int)));  
    t.Rows.Add(true, 1, 1);  
    t.Rows.Add(false, 2, 2);  
  
}  
  
private void button1_Click(object sender, EventArgs e)  
{  
    for (int i = 0; i < t.Rows.Count; i++)  
    {  
        var dr = t.Rows[i];  
        if ((bool)dr[0])  
    {  
        dt.ImportRow(dr);  
    }  
}  
}  

The watch screen:

Best Regards,
Daniel Zhang

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