winform循环删除的问题

Question

for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                 if( dataGridView1.Rows[i].Cells[0].EditedFormattedValue.ToString().Equals("True") )
                {
                    dataGridView1.Rows.RemoveAt(i);
                }  
            }
发现有些选中不能删除.在多执行几次才行

Answer 1

dataGridView1.Rows.RemoveAt(i); 这句执行之后dataGridView1.Rows.Count;就变了 

Answer 2

for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                if( dataGridView1.Rows[i].Cells[0].EditedFormattedValue.ToString().Equals("True") )
                {
                    dataGridView1.Rows.RemoveAt(i);
                    i--;
                } 
            } 

Answer 3

   List<DataGridViewRow> lrs = new List<DataGridViewRow>();
           for (int i = 0; i < dataGridView1.Rows.Count; i++)
           {
              if( dataGridView1.Rows[i].Cells[0].EditedFormattedValue.ToString().Equals("True") ) 
                { 
                    lrs.Add(dataGridView1.Rows[i]);
                }  
                   
               
           }
           for (int i = 0; i < lrs.Count; i++)
           {
               dataGridView1.Rows.Remove(lrs[i]);
           }

Answer 4

 for (int i = dataGridView1.Rows.Count-1; i >=0 ; i--)
            {
                if (dataGridView1.Rows[i].Cells[0].EditedFormattedValue.ToString().Equals("True"))
                {
                    dataGridView1.Rows.RemoveAt(i);
                }
            } 正确的删除顺序是从后向前删除，原因自己想下就出来了。

Answer 5

当从集合中移除时，集合中后续项的索引将改变。从后面删起
for (int i = dataGridView1.Rows.Count; i > 0; i--) 
            { 
                if( dataGridView1.Rows[i-1].Cells[0].EditedFormattedValue.ToString().Equals("True") ) 
                { 
                    dataGridView1.Rows.RemoveAt(i); 
                }  
            } 

Answer 6

dataGridView1.Rows.Clear()
一句话搞定。

Answer 7

int i = 0;
while (i < dataGridView1.Rows.Count)
{
   if (dataGridView1.Rows[i].Cells[0].EditedFormattedValue.ToString().Equals("True"))
     dataGridView1.Rows.RemoveAt(i);
   else
     i++;
}