关于判断datagridview问题

Question

我有23列，其中有些列时空白的，有些列时有数据的！我想提取有数据的列，请问怎么判断哪些列有数据！

Answer 1

datatable有select，里面可以做简单的条件筛选
或者遍历grid

Answer 2

如果可以用select那就可以直接把要显示列显示出来就额可以了

Answer 3

DataTable dt = new DataTable();
                            DataRow dr = new DataRow();
                            int al = DGV.Rows.Count;
                            int forjudge = 0;
                            for (int j = 0; j < al; j++)
                            {
                                forjudge = 0;
                                for(int ii=0; ii<DGV.Columns.Count;ii++)
                                {
                                    if (DGV.Rows[j].Cells[ii].ToString().Length > 0)
                                    {
                                        if (ii == DGV.Columns.Count)
                                        {
                                            forjudge = 1;
                                        }
                                    }
                                }                                if (forjudge == 1)
                                {
                                    DataRow datarow = dt.NewRow();
                                    for (int i = 0; i < DGV.Columns.Count; i++)
                                    {
                                        datarow[i] = DS.Tables["temp"].Rows[j].ItemArray[i];
                                    }
                                    dt.Rows.Add(datarow);
                                }
;
                            }
                            DGV.DataSource = dt;
自己再变化下试试看，应该可以

Answer 4

DataRow dr = new DataRow();
额，多了句没用的，粗心，呵呵

Answer 5

自己写了个代码实验了下： 
  private void btn11_Click(object sender, EventArgs e)
        {
            // 提取有效列（有一单元格有数据就有效）
            for (int i = 1; i < dgvIODeviceMessage.ColumnCount; i++)
            {
                for (int j = 0; j < 6; j++)
                {
                    if (dgvIODeviceMessage[i, j].Value != null)
                    {
                        dgvIODeviceMessage.Columns[i].Name = i.ToString();
                        MessageBox.Show(dgvIODeviceMessage.Columns[i].Name.ToString());
                        break;
                    }
                }
            }
        }我将有数据的列的name改为和列的索引值一样，这样就可以通过列的索引找到有数据的列了！！探讨下！！

Answer 6

自己写了个代码实验了下： 
  private void btn11_Click(object sender, EventArgs e)
        {
            // 提取有效列（有一单元格有数据就有效）
            for (int i = 1; i < dgvIODeviceMessage.ColumnCount; i++)
            {
                for (int j = 0; j < 6; j++)
                {
                    if (dgvIODeviceMessage[i, j].Value != null)
                    {
                        dgvIODeviceMessage.Columns[i].Name = i.ToString();
                        MessageBox.Show(dgvIODeviceMessage.Columns[i].Name.ToString());
                        break;
                    }
                }
            }
        }我将有数据的列的name改为和列的索引值一样，这样就可以通过列的索引找到有数据的列了！！探讨下！！