private void StepArtDgv_KeyUp(object sender, KeyEventArgs e)
        {
            //粘贴
            if (e.KeyCode == Keys.V && e.Control)
            {
                // 获取剪切板的内容，并按行分割
                string pasteText = Clipboard.GetText().Replace("\r\n", "@").TrimEnd(‘@‘);

                //选中区域是区块后，
                int xzRowCount_Z = StepArtDgv.SelectedCells[StepArtDgv.SelectedCells.Count - 1].RowIndex;//选中左上角的单元格的行索引
                int xzColCount_Z = StepArtDgv.SelectedCells[StepArtDgv.SelectedCells.Count - 1].ColumnIndex;//选中左上角的单元格的列索引
                int xzRowCount_Y = StepArtDgv.CurrentCell.RowIndex;//选中右下角的单元格的列索引
                int xzColCount_Y = StepArtDgv.CurrentCell.ColumnIndex;//选中右下角的单元格的行索引

                int Colcounts = xzColCount_Y + 1 - StepArtDgv.SelectedCells[StepArtDgv.SelectedCells.Count - 1].ColumnIndex;//粘贴区域的列数
                int Rowcounts = xzRowCount_Y + 1 - StepArtDgv.SelectedCells[StepArtDgv.SelectedCells.Count - 1].RowIndex;//粘贴区域的行数

                int MaxRowIndex = StepArtDgv.Rows.Count - 1; //获取做大的行数，最下面的行索引
                int MaxColIndex = StepArtDgv.ColumnCount - 1; //获取做大的列数，最右面的行索引

                //临时变量，索引随时都有可能在曾东增加，然而增加后无法还原，所以采用临时变量存储
                int tempRowIndexs = xzRowCount_Z;
                int tempColumnIndexs = xzColCount_Z;

                if (xzColCount_Z == 0)
                {
                    MessageBox.Show("项目名称不能粘贴！");
                    return;
                }

                string[] Row = null;
                Row = pasteText.Split(‘@‘);//分割的行数数组

                string[] col = null;//分割行后的列，每行的内容
                col = Row[0].Replace("\t", "#").TrimEnd(‘#‘).Split(‘#‘);//专门存储列数

                //判断是否存在非数字类型
                for (int t = 0; t < Row.Length; t++)
                {
                    col = Row[t].Replace("\t", "#").TrimEnd(‘#‘).Split(‘#‘);
                    //for (int t1 = 0; t1 < col.Length; t1++)
                    //{
                        ////判断字符串
                        //if (!reg.IsMatch(col[t1].ToString().Trim()))
                        //{
                        //    MessageBox.Show("粘贴的内容存在非数字类型！");
                        //    return;
                        //}
                    //}

                }
                if (Row.Length > 0)
                {
                    //粘贴区块，列行都是选中的倍数
                    if (Rowcounts % Row.Length == 0 && Colcounts % col.Length == 0)
                    {
                        for (int cs = 0; cs < Colcounts / col.Length; cs++)
                        {
                            for (int rs = 0; rs < Rowcounts / Row.Length; rs++)
                            {
                                for (int r = 0; r < Row.Length; r++)
                                {
                                    if (xzRowCount_Z > MaxRowIndex) break;//跳出行
                                    //获取每行中的内容
                                    string rowMessage = Row[r].Replace("\t", "#").TrimEnd(‘#‘);
                                    col = rowMessage.Split(‘#‘);
                                    for (int c = 0; c < col.Length; c++)
                                    {
                                        if (xzColCount_Z > MaxColIndex) break;//粘贴内容出了DGV的区域,跳出该循环，进行下一行

                                        StepArtDgv.Rows[xzRowCount_Z].Cells[xzColCount_Z].Value = col[c];
                                        xzColCount_Z++;
                                    }
                                    xzRowCount_Z++;
                                    xzColCount_Z = tempColumnIndexs;//因为列自增了，需要还原，进行下一行填充
                                }
                            }
                            xzRowCount_Z = tempRowIndexs;//行数从头开始
                            xzColCount_Z += col.Length;//列增加
                            tempColumnIndexs += col.Length;//列的临时变量也要跟着变
                        }
                    }//粘贴区块，行是选中的行的倍数
                    else if (Rowcounts % Row.Length == 0)
                    {
                        for (int rs = 0; rs < Rowcounts / Row.Length; rs++)
                        {
                            for (int r = 0; r < Row.Length; r++)
                            {
                                if (xzRowCount_Z > MaxRowIndex) break;//跳出行
                                //获取每行中的内容
                                string rowMessage = Row[r].Replace("\t", "#").TrimEnd(‘#‘);
                                col = rowMessage.Split(‘#‘);
                                for (int c = 0; c < col.Length; c++)
                                {
                                    if (xzColCount_Z > MaxColIndex) break;//粘贴内容出了DGV的区域,跳出该循环，进行下一行

                                    StepArtDgv.Rows[xzRowCount_Z].Cells[xzColCount_Z].Value = col[c];
                                    xzColCount_Z++;
                                }
                                xzRowCount_Z++;
                                xzColCount_Z = tempColumnIndexs;//因为列自增了，需要还原，进行下一行填充
                            }
                            xzColCount_Z = tempColumnIndexs;//因为列自增了，需要还原，进行下一行填充
                        }
                    }//粘贴区块，列是选中的列的倍数
                    else if (Colcounts % col.Length == 0)
                    {
                        for (int cs = 0; cs < Colcounts / col.Length; cs++)
                        {
                            for (int r = 0; r < Row.Length; r++)
                            {
                                if (xzRowCount_Z > MaxRowIndex) break;//跳出行
                                //获取每行中的内容
                                string rowMessage = Row[r].Replace("\t", "#").TrimEnd(‘#‘);
                                col = rowMessage.Split(‘#‘);
                                for (int c = 0; c < col.Length; c++)
                                {
                                    if (xzColCount_Z > MaxColIndex) break;//粘贴内容出了DGV的区域,跳出该循环，进行下一行

                                    StepArtDgv.Rows[xzRowCount_Z].Cells[xzColCount_Z].Value = col[c];
                                    xzColCount_Z++;
                                }
                                xzColCount_Z = tempColumnIndexs;
                                xzRowCount_Z++;//行数从头开始
                            }
                            xzRowCount_Z = tempRowIndexs;//行数从头开始
                            xzColCount_Z += col.Length;//列增加
                            tempColumnIndexs += col.Length;//列的临时变量也要跟着变
                        }
                    } //粘贴区块小于选中区块(粘贴区块只是一个单元格 || 行和列小于粘贴区块 || 不是行或者列的倍数)
                    else if (Rowcounts <= Row.Length && Colcounts <= col.Length || Rowcounts % Row.Length != 0 || Colcounts % col.Length != 0)
                    {
                        for (int r = 0; r < Row.Length; r++)//循环行
                        {
                            if (xzRowCount_Z > MaxRowIndex) break;//跳出行
                            //获取每行中的内容
                            string rowMessage = Row[r].Replace("\t", "#").TrimEnd(‘#‘);
                            col = rowMessage.Split(‘#‘);

                            //为每个单元格赋值
                            for (int c = 0; c < col.Length; c++)
                            {
                                if (xzColCount_Z > MaxColIndex) break;//粘贴内容出了DGV的区域,跳出该循环，进行下一行

                                StepArtDgv.Rows[xzRowCount_Z].Cells[xzColCount_Z].Value = col[c];
                                xzColCount_Z++;
                            }
                            xzRowCount_Z++;//下一行
                            xzColCount_Z = tempColumnIndexs;//因为列自增了，需要还原，进行下一行填充
                        }
                    }
                }
            }
        }

datagridview实现复制粘贴