c# datagridview中可以实现数据拖动不？

Question

c#  datagridview中可以实现数据拖动不？就是可以把选中的数据拖动到其他位置如果不行的话，有其他方法不 ？

Answer 1

理论上可以，在按住鼠标移动时，复复制选中内容在剪切板，松开时粘贴在当前位置
你可以参考一下这个
[code=C#]        #region dgv复制、剪切、 删除、清除、粘贴
        /// <summary>
        /// DataGridView复制
        /// </summary>
        /// <param name="dgv">DataGridView实例</param>
        private void dgvCopy(ref DataGridView dgv)
        {
            if (dgv.GetCellCount(DataGridViewElementStates.Selected) > 0)
            {
                try
                {
                    Clipboard.SetDataObject(dgv.GetClipboardContent());
                }
                catch (Exception MyEx)
                {
                    MessageBox.Show(MyEx.Message, " ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
        }
        /// <summary>
        /// DataGridView剪切
        /// </summary>
        /// <param name="dgv">DataGridView实例</param>
        private void dgvCut(ref DataGridView dgv)
        {
            dgvCopy(ref dgv);
            dgvClear(ref dgv);
            dgvDel();        }
        /// <summary>
        /// DataGridView清除内容
        /// </summary>
        /// <param name="dgv">DataGridView实例</param>
        private void dgvClear(ref DataGridView dgv)
        {
            try
            {
                foreach (DataGridViewCell dgvcell in dgv.SelectedCells)
                {
                    if (dgvcell.ColumnIndex != 0)
                        dgvcell.Value = 0;
                }
            }
            catch (Exception MyEx)
            {
                MessageBox.Show(MyEx.Message);
            }        }
        /// <summary>
        /// DataGridView删除
        /// </summary>
        /// <param name="dgv">DataGridView实例</param>
        private void dgvDel()
        {
            try
            {
                SendKeys.Send("{Del}");
            }
            catch (Exception MyEx)
            {
                MessageBox.Show(MyEx.Message);
            }        }
        /// <summary>
        /// DataGridView粘贴
        /// </summary>
        /// <param name="dt">DataGridView数据源</param>
        /// <param name="dgv">DataGridView实例</param>
        public void dgvPaste(ref DataTable dt, ref DataGridView dgv)
        {            try
            {
                int cRowIndex = dgv.CurrentCell.RowIndex;
                int cColIndex = dgv.CurrentCell.ColumnIndex;
                //最后一行为新行
                int rowCount = dgv.Rows.Count - 1;
                int colCount = dgv.ColumnCount;
                //获取剪贴板内容
                string pasteText = Clipboard.GetText();
                //判断是否有字符存在
                if (string.IsNullOrEmpty(pasteText))
                    return;
                //以换行符分割的数组
                string[] lines = pasteText.Trim().Split('\n');
                int txtLength = lines.Length;
                //去掉空行
                for (int si = 0; si < txtLength; si++)
                {
                    if (lines[si].Trim() == "")
                    {
                        for (int ssi = si; ssi < txtLength - 1; ssi++)
                        {
                            lines[ssi] = lines[ssi + 1];
                        }
                        txtLength--;
                    }
                }
                DataRow row;
                //判断是修改还是添加,如果dgv中行数减当前行号大于要粘贴的行数，直接修改
                if (rowCount - cRowIndex >= txtLength)
                {
                    for (int j = cRowIndex; j < cRowIndex + txtLength; j++)
                    {
                        //以制表符分割的数组
                        string[] vals = lines[j - cRowIndex].Trim().Split('\t');
                        //判断要粘贴的列数与dgv中列数减当前列号的大小，取最小值
                        int minColLength = vals.Length > colCount - cColIndex ? colCount - cColIndex : vals.Length;
                        //处理被标记为"Deleted"的行
                        int l = 0;
                        int j1 = 0;
                        while (l <= j)
                        {
                            if (dt.Rows[j1].RowState != DataRowState.Deleted)
                                l++;
                            j1++;
                        }
                        j1--;
                        row = dt.Rows[j1];
                        for (int i = 0; i < minColLength; i++)
                        {
                            row[i + cColIndex] = vals[i];
                        }
                    }
                }
                //否则先修改后添加
                else
                {
                    //修改
                    for (int j = cRowIndex; j < rowCount; j++)
                    {
                        string[] vals = lines[j - cRowIndex].Trim().Split('\t');
                        int minColLength = vals.Length > colCount - cColIndex ? colCount - cColIndex : vals.Length;
                        //处理被标记为"Deleted"的行
                        int l = 0;
                        int j1 = 0;
                        while (l <= j)
                        {
                            if (dt.Rows[j1].RowState != DataRowState.Deleted)
                                l++;
                            j1++;
                        }
                        j1--;
                        row = dt.Rows[j1];
                        for (int i = 0; i < minColLength; i++)
                        {
                            row[i + cColIndex] = vals[i];
                        }
                    }
                    //添加
                    for (int j = rowCount; j < cRowIndex + txtLength; j++)
                    {
                        string[] vals = lines[j - cRowIndex].Trim().Split('\t');
                        int minColLength = vals.Length > colCount - cColIndex ? colCount - cColIndex : vals.Length;
                        //新行
                        row = dt.NewRow();
                        for (int i = 1; i < dt.Columns.Count; i++)
                        {
                            row[i] = 0;
                        }
                        for (int i = 0; i < minColLength; i++)
                        {
                            row[i + cColIndex] = vals[i];
                        }
                        //添加到dgv数据源中
                        dt.Rows.Add(row);
                    }
                    if (cRowIndex == rowCount)
                    {
                        dgv.Rows[dgv.CurrentCell.RowIndex].Selected = true;
                        SendKeys.Send("{Del}");
                    }
                }
            }
            catch (Exception MyEx)
            {
                MessageBox.Show(MyEx.Message);
            }
        }

Answer 2

private void dataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
  {
  dataGridView1.DoDragDrop(e.ColumnIndex, DragDropEffects.Copy);   
  }  private void textBox1_DragEnter(object sender, DragEventArgs e)
  {
  if (e.Data.GetDataPresent(typeof(int)))
  {
  e.Effect = DragDropEffects.Copy;
  }
  else
  e.Effect = DragDropEffects.None;     }  private void textBox1_DragDrop(object sender, DragEventArgs e)
  {
  int index = -1;
  if (e.Data.GetDataPresent(typeof(int)))
  {
  index = (int)e.Data.GetData(typeof(int));
  }
  if (index > -1)
  textBox1.Text = dataGridView1.Columns[index].Name;   
  }
  }

Answer 3

datagridview.用好了后，可以选择一些开源的控件来绑定数据。

Answer 4

感谢三楼——(人生如梦)，你总是在我需要的时候出现，感激涕零。这次你写的代码学习了，你写的是不是把datagridview数据拖动到textbox中不？可能是我没有说清楚，我想的是实现在datagridview中把数据从一个地方拖动到datagridview中的另一个地方，不知道可以实现不？

Answer 5

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            //initial dgv
            dgvColumnName();
            dataGridView1.MouseDown += new MouseEventHandler(dataGridView1_MouseDown);
            dataGridView1.DragEnter += new DragEventHandler(dataGridView1_DragEnter);
            dataGridView1.DragDrop += new DragEventHandler(dataGridView1_DragDrop);
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            dataGridView1.ClearSelection();
        }
        private void dgvColumnName()
        {
            try
            {
                this.dataGridView1.DataSource = DgvOperation.GetDataTable();
                this.dataGridView1.Columns[0].HeaderText = "XX1";
                this.dataGridView1.Columns[1].HeaderText = "XX2";
                this.dataGridView1.Columns[0].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
                this.dataGridView1.Columns[1].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
                this.dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                //.
            }        }
        private void dgv_MouseDown(object sender, MouseEventArgs e)
        {
            DataGridView.HitTestInfo info = this.dataGridView1.HitTest(e.X, e.Y);
            if (info.RowIndex != -1 && info.ColumnIndex != -1)
            {
                Object value = this.dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value;
                if (value != null)
                {
                    this.dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value = null;
                    this.DoDragDrop(value, DragDropEffects.Move);
                }
            }
        }
        private void dgv_DragDrop(object sender, DragEventArgs e)
        {
            Point p = this.dataGridView1.PointToClient(new Point(e.X, e.Y));
            DataGridView.HitTestInfo info = this.dataGridView1.HitTest(p.X, p.Y);
            if (info.RowIndex != -1 && info.ColumnIndex != -1)
            {
                Object value = (Object)e.Data.GetData(typeof(string));
                this.dataGridView1.Rows[info.RowIndex].Cells[info.ColumnIndex].Value = value;
            }
        }
        private void dgv_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Move;
        }    }有参考了别人的程序，看下是否达到你的要求了。

Answer 6

thisiscandy的代码我试过了，不行呀，单击后数据消失，但是没有办法拖动到新的地方.