DataGridView粘贴复制功能

鉴于网上众多的有关DataGridView粘贴功能的Demo都不好理解，找了一圈也没有一个好用的，我决定自己实现一个简单的，拿来就能用的Demo。

1.PreviewKeyDown会监听按键的按下，只需要判断Ctrl和V同事按下就可以

        //在DataGridView的PreviewKeyDown事件中
        private void dataGridView1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
        {
            if (e.Control && e.KeyCode == Keys.V) // 判断是否按下ctrl+v
            {
                Paste(dataGridView1, "", 0, false);//粘贴代码
            }
        }

Paste()方法的代码

public int Paste(DataGridView dgv, string pasteText, int kind, bool b_cut)
        {
            try
            {
                if (kind == 0)
                {
                    pasteText = Clipboard.GetText();
                }
                if (string.IsNullOrEmpty(pasteText))
                    return -1;
                int rowNum = 0;
                int columnNum = 0;
                //获得当前剪贴板内容的行、列数
                for (int i = 0; i < pasteText.Length; i++)
                {
                    if (pasteText.Substring(i, 1) == "\t")
                    {
                        columnNum++;
                    }
                    if (pasteText.Substring(i, 1) == "\n")
                    {
                        rowNum++;
                    }
                }
                Object[,] data;
                //粘贴板上的数据来自于EXCEL时，每行末都有\n，在DATAGRIDVIEW内复制时，最后一行末没有\n
                if (pasteText.Substring(pasteText.Length - 1, 1) == "\n")
                {
                    rowNum = rowNum - 1;
                }
                columnNum = columnNum / (rowNum + 1);
                data = new object[rowNum + 1, columnNum + 1];

                String rowStr;
                //对数组赋值
                for (int i = 0; i < (rowNum + 1); i++)
                {
                    for (int colIndex = 0; colIndex < (columnNum + 1); colIndex++)
                    {
                        rowStr = null;
                        //一行中的最后一列
                        if (colIndex == columnNum && pasteText.IndexOf("\r") != -1)
                        {
                            rowStr = pasteText.Substring(0, pasteText.IndexOf("\r"));
                        }
                        //最后一行的最后一列
                        if (colIndex == columnNum && pasteText.IndexOf("\r") == -1)
                        {
                            rowStr = pasteText.Substring(0);
                        }
                        //其他行列
                        if (colIndex != columnNum)
                        {
                            rowStr = pasteText.Substring(0, pasteText.IndexOf("\t"));
                            pasteText = pasteText.Substring(pasteText.IndexOf("\t") + 1);
                        }
                        if (rowStr == string.Empty)
                            rowStr = null;
                        data[i, colIndex] = rowStr;
                    }
                    //截取下一行数据
                    pasteText = pasteText.Substring(pasteText.IndexOf("\n") + 1);
                }
                /*检测值是否是列头*/
                /*
                //获取当前选中单元格所在的列序号
                int columnindex = dgv.CurrentRow.Cells.IndexOf(dgv.CurrentCell);
                //获取获取当前选中单元格所在的行序号
                int rowindex = dgv.CurrentRow.Index;*/
                int columnindex = -1, rowindex = -1;
                int columnindextmp = -1, rowindextmp = -1;
                if (dgv.SelectedCells.Count != 0)
                {
                    columnindextmp = dgv.SelectedCells[0].ColumnIndex;
                    rowindextmp = dgv.SelectedCells[0].RowIndex;
                }
                //取到最左上角的 单元格编号
                foreach (DataGridViewCell cell in dgv.SelectedCells)
                {
                    //dgv.Rows[cell.RowIndex].Selected = true;
                    columnindex = cell.ColumnIndex;
                    if (columnindex > columnindextmp)
                    {
                        //交换
                        columnindex = columnindextmp;
                    }
                    else
                        columnindextmp = columnindex;
                    rowindex = cell.RowIndex;
                    if (rowindex > rowindextmp)
                    {
                        rowindex = rowindextmp;
                        rowindextmp = rowindex;
                    }
                    else
                        rowindextmp = rowindex;
                }
                if (kind == -1)
                {
                    columnindex = 0;
                    rowindex = 0;
                }

                ////如果行数超过当前列表行数
                //if (rowindex + rowNum + 1 > dgv.RowCount)
                //{
                //    int mm = rowNum + rowindex + 1 - dgv.RowCount;
                //    for (int ii = 0; ii < mm+1; ii++)
                //    {
                //        dgv.DataBindings.Clear();
                //        DataRow row = row = dgv.Tables[0].NewRow();
                //        dgv.Tables[0].Rows.InsertAt(row, ii + rowindex + 1);
                //    }
                //}

                //如果列数超过当前列表列数
                if (columnindex + columnNum + 1 > dgv.ColumnCount)
                {
                    int mmm = columnNum + columnindex + 1 - dgv.ColumnCount;
                    for (int iii = 0; iii < mmm; iii++)
                    {
                        dgv.DataBindings.Clear();
                        DataGridViewTextBoxColumn colum = new DataGridViewTextBoxColumn();
                        dgv.Columns.Insert(columnindex + 1, colum);
                    }
                }

                //增加超过的行列
                for (int j = 0; j < (rowNum + 1); j++)
                {
                    for (int colIndex = 0; colIndex < (columnNum + 1); colIndex++)
                    {
                        if (colIndex + columnindex < dgv.Columns.Count)
                        {
                            if (dgv.Columns[colIndex + columnindex].CellType.Name == "DataGridViewTextBoxCell")
                            {
                                if (dgv.Rows[j + rowindex].Cells[colIndex + columnindex].ReadOnly == false)
                                {
                                    dgv.Rows[j + rowindex].Cells[colIndex + columnindex].Value = data[j, colIndex];
                                    dgv.Rows[j + rowindex].Cells[colIndex + columnindex].Selected = true;
                                }
                            }
                        }
                    }
                }
                //清空剪切板内容
                if (b_cut)
                    Clipboard.Clear();
                return 1;
            }
            catch
            {
                return -1;
            }
}

2.复制功能只需要更改一个属性ClipBoardCopyMode为Disable以外的属性就可以了