如何于DataGridView控件中以跨数据行方式显示数…

一般来说，每一个字段的内容会单独显示于DataGridView控件的一个数据行中。问题是，某些字段拥有大量文字数据，我是不是能够让该字段的内容以跨数据行的方式来显示，以便在有限的画面空间中的呈现出更完整的内容呢？答案当然是肯定的。

以图表1所示的执行画面而言，「自传」字段的内容并未单独显示于一个数据行中，而是以横跨数据行的方式，显示在同笔数据列之各字段内容的下方。相关程序代码列示如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
…
…
…
private int oldRowIndex = 0;
private const int CUSTOM_CONTENT_HEIGHT = 80;
private DataSet myDataSet;

private void CH13_DemoForm009_Load(object sender, EventArgs e)
{
Padding newPadding = new Padding(0, 1, 0, CUSTOM_CONTENT_HEIGHT);
this.DataGridView1.RowTemplate.DefaultCellStyle.Padding = newPadding;

this.DataGridView1.RowTemplate.DefaultCellStyle.SelectionBackColor =
Color.Transparent;

this.DataGridView1.RowTemplate.Height = CUSTOM_CONTENT_HEIGHT;

this.DataGridView1.AllowUserToAddRows = false;
this.DataGridView1.EditMode = DataGridViewEditMode.EditOnKeystrokeOrF2;
this.DataGridView1.CellBorderStyle = DataGridViewCellBorderStyle.None;
this.DataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;

myDataSet = LoadDataToDataSet();

if(myDataSet != null)
{
// 将 BindingSource 组件系结至数据集对象中的「飞狐工作室」数据表。
this.BindingSource1.DataMember = "飞狐工作室";
this.BindingSource1.DataSource = myDataSet;

this.BindingSource1.AllowNew = false;

// 将 BindingNavigator 控件的数据来源也设定成 BindingSource 组件
//，如此一来，就可以使用 BindingNavigator 控件去导览
// DataGridView 控件中的数据列。
this.BindingNavigator1.BindingSource = this.BindingSource1;

this.DataGridView1.DataSource = this.BindingSource1;
}
else
{
return;
}

this.DataGridView1.Columns[4].Visible = false;

this.DataGridView1.Columns[0].SortMode =
DataGridViewColumnSortMode.NotSortable;
this.DataGridView1.Columns[2].SortMode =
DataGridViewColumnSortMode.NotSortable;
this.DataGridView1.Columns[3].SortMode =
DataGridViewColumnSortMode.NotSortable;

this.DataGridView1.AutoResizeRows(
DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders);
}

private void DataGridView1_ColumnWidthChanged(object sender,
DataGridViewColumnEventArgs e)
{
this.DataGridView1.Invalidate();
}

private void DataGridView1_CurrentCellChanged(object sender, EventArgs e)
{
if(oldRowIndex != -1)
{
this.DataGridView1.InvalidateRow(oldRowIndex);
}

oldRowIndex = this.DataGridView1.CurrentCellAddress.Y;
}

private void DataGridView1_RowPrePaint(object sender,
DataGridViewRowPrePaintEventArgs e)
{
e.PaintParts = e.PaintParts & (~DataGridViewPaintParts.Focus);

if((e.State & DataGridViewElementStates.Selected) ==
DataGridViewElementStates.Selected)
{
Rectangle rowBounds = new Rectangle(
this.DataGridView1.RowHeadersWidth, e.RowBounds.Top,
this.DataGridView1.Columns.GetColumnsWidth(
DataGridViewElementStates.Visible) -
this.DataGridView1.HorizontalScrollingOffset 1,
e.RowBounds.Height);

System.Drawing.Drawing2D.LinearGradientBrush backbrush =
new System.Drawing.Drawing2D.LinearGradientBrush(rowBounds,
this.DataGridView1.DefaultCellStyle.SelectionBackColor,
e.InheritedRowStyle.ForeColor,
System.Drawing.Drawing2D.LinearGradientMode.Horizontal);

try
{
e.Graphics.FillRectangle(backbrush, rowBounds);
}
finally
{
backbrush.Dispose();
}
}
}

private void DataGridView1_RowPostPaint(object sender,
DataGridViewRowPostPaintEventArgs e)
{
Rectangle rowBounds = new Rectangle(this.DataGridView1.RowHeadersWidth,
e.RowBounds.Top, this.DataGridView1.Columns.GetColumnsWidth(

DataGridViewElementStates.Visible) -
this.DataGridView1.HorizontalScrollingOffset 1, e.RowBounds.Height);

SolidBrush forebrush = null;

try
{
if((e.State & DataGridViewElementStates.Selected) ==
DataGridViewElementStates.Selected)
{
forebrush = new SolidBrush(e.InheritedRowStyle.SelectionForeColor);

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