RT。。我继承GridView控件，自己添加了些新功能。现在想在 protected override void OnRowDataBound(GridViewRowEventArgs e)
方法里给表头添加样式
e.Row.RowType == DataControlRowType.DataRow//判断行类型为表头
我现在添加样式不知道如何定位到该行，我想把该行的背景色置为黑，并且不透明
方法里给表头添加样式
e.Row.RowType == DataControlRowType.DataRow//判断行类型为表头
我现在添加样式不知道如何定位到该行，我想把该行的背景色置为黑，并且不透明
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace CIPAceLicense
{
/// <summary>
/// DataGridComboBoxColumn summary。
/// </summary>
public class DataGridComboBoxColumn : DataGridColumnStyle
{ private DataGridComboBox m_comboBox;
private bool m_edit;
public DataGridComboBoxColumn()
{
this.m_comboBox = new DataGridComboBox();
this.m_comboBox.Visible = false;
this.m_comboBox.DropDownStyle = ComboBoxStyle.DropDownList;
this.m_comboBox.Leave += new EventHandler(m_comboBox_Leave);
this.m_comboBox.SelectionChangeCommitted += new EventHandler(m_comboBox_SelectedIndexChanged);
this.m_edit = false;
} public ComboBox comboBox
{
get
{
return m_comboBox;
}
}
//comboBox event
//lost fucos comboBox hide
private void m_comboBox_Leave(object sender, EventArgs e)
{
this.m_comboBox.Hide();
} //选定项发生更改并提交更改通知用户开始编辑列
private void m_comboBox_SelectedIndexChanged(object sender, EventArgs e)
{
this.m_edit = true;
base.ColumnStartedEditing((Control)sender);
} //重写DataGridColunmStyle
protected override void SetDataGridInColumn(DataGrid value)
{
//将comboBox加入到DataGrid控件集合中
//确保正确的DataGrid scrolling
value.Controls.Add(this.m_comboBox);
base.SetDataGridInColumn(value);
}
//当 DataGridColumnStyle 方法的 Commit 方法返回 false 时，Abort 方法被 DataGrid 使用。
//在这种情况下，列值滚动回原先的值。
//在返回之前，DataGridColumnStyle 必须结束所有编辑操作。使用 Abort 方法来实现该操作。
//System.Windows.Forms.DataGrid 控件的 EndEdit 方法间接调用 Abort（如果其 ShouldAbort 参数设置为 true）。
protected override void Abort(int rowNum)
{
this.m_edit = false;
Invalidate();
this.m_comboBox.Hide();
}
//准备单元格以便进行编辑。
protected override void Edit(CurrencyManager source, int rowNum, System.Drawing.Rectangle bounds, bool readOnly, string instantText, bool cellIsVisible)
{
this.m_comboBox.Parent = this.DataGridTableStyle.DataGrid;
this.m_comboBox.Bounds = bounds;
this.m_comboBox.Size = new System.Drawing.Size(this.Width, this.comboBox.Height);
this.m_comboBox.SelectedValue = base.GetColumnValueAtRow(source, rowNum).ToString();
this.m_comboBox.Visible = (!readOnly) && cellIsVisible;
this.m_comboBox.BringToFront();
this.m_comboBox.Focus();
} //如果编辑过程成功提交，则为 true；否则为 false。
protected override bool Commit(CurrencyManager dataSource, int rowNum)
{
if (this.m_edit == true)
{
this.m_edit = false;
//保存值
this.SetColumnValueAtRow(dataSource, rowNum, this.m_comboBox.SelectedValue);
}
return true;
}
//获取指定 CurrencyManager 中指定行内的值。
protected override object GetColumnValueAtRow(CurrencyManager source, int rowNum)
{
//return base.GetColumnValueAtRow (source, rowNum);
return this.m_comboBox.GetDisplayText(base.GetColumnValueAtRow(source, rowNum));
}
//用来自指定 CurrencyManager 的值设置指定行中的值。
protected override void SetColumnValueAtRow(CurrencyManager source, int rowNum, object value)
{
try
{
base.SetColumnValueAtRow(source, rowNum, value.ToString());
return;
}
catch
{ }
//下面是另外一种方法，对于使用GUID全局唯一标识符有效
try
{
base.SetColumnValueAtRow(source, rowNum, new Guid(value.ToString()));
return;
}
catch
{ }
}
protected override int GetMinimumHeight()
{
return this.m_comboBox.PreferredHeight + 2;
}
//在派生类中被重写时，将获取自动调整列的大小所用的高度。
protected override int GetPreferredHeight(System.Drawing.Graphics g, object value)
{
return FontHeight + 2;
} //在派生类中被重写时，将获取指定值的宽度和高度。
//在用户定位到使用 DataGridColumnStyle 的 DataGridTableStyle 时将使用该宽度和高度。
protected override System.Drawing.Size GetPreferredSize(System.Drawing.Graphics g, object value)
{
//return new System.Drawing.Size ();
int widths = 0;
SizeF strF = new SizeF(0, 0);
foreach (string str in this.m_comboBox.GetDisplayText())
{
strF = g.MeasureString(str, base.DataGridTableStyle.DataGrid.Font);
if (strF.Width > widths)
{
widths = (int)Math.Ceiling(strF.Width);///////////////////////////////////////////////////////////////////////////////////////////////////////
}
}
return new System.Drawing.Size(widths + 25, this.m_comboBox.PreferredHeight + 2);
}
//绘制具有指定 Graphics、Rectangle、CurrencyManager 和行号的 DataGridColumnStyle。
protected override void Paint(System.Drawing.Graphics g, System.Drawing.Rectangle bounds, CurrencyManager source, int rowNum)
{
//绘制具有指定 Graphics、Rectangle、CurrencyManager、行号和对齐方式的 DataGridColumnStyle。
Paint(g, bounds, source, rowNum, false);
}
//绘制具有指定 Graphics、Rectangle、CurrencyManager、行号、背景色、前景色和对齐方式的 DataGridColumnStyle。
protected override void Paint(System.Drawing.Graphics g, System.Drawing.Rectangle bounds, CurrencyManager source, int rowNum, bool alignToRight)
{
//string text = this.GetColumnValueAtRow(source,rowNum).ToString();
string text = GetColumnValueAtRow(source, rowNum).ToString();
Brush backBrush = new SolidBrush(base.DataGridTableStyle.BackColor);
Brush foreBrush = new SolidBrush(base.DataGridTableStyle.ForeColor);
Rectangle rect = bounds;
StringFormat format = new StringFormat(); // 单元格被选中
if (base.DataGridTableStyle.DataGrid.IsSelected(rowNum) == true)
{
backBrush = new SolidBrush(base.DataGridTableStyle.SelectionBackColor);
foreBrush = new SolidBrush(base.DataGridTableStyle.SelectionForeColor);
}
if (alignToRight == true)
{
format.FormatFlags = StringFormatFlags.DirectionRightToLeft;
} switch (this.Alignment)
{
case HorizontalAlignment.Left:
format.Alignment = StringAlignment.Near;
break;
case HorizontalAlignment.Right:
format.Alignment = StringAlignment.Far;
break;
case HorizontalAlignment.Center:
format.Alignment = StringAlignment.Center;
break;
}
// Paint.
format.FormatFlags = StringFormatFlags.NoWrap;
g.FillRectangle(backBrush, rect);
rect.Offset(0, 0);
rect.Height = 0;
g.DrawString(text, this.DataGridTableStyle.DataGrid.Font, foreBrush, rect, format);
format.Dispose();
}
}
}
{
if (e.Row.RowType == DataControlRowType.Header)
e.Row.Attributes.Add("style","width:300px;background-color:red;height:30px;");
base.OnRowDataBound(e);
}
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
// _cssClassMouseOver不是空则执行
if (!string.IsNullOrEmpty(this._cssClassMouseOver))
{
// 在<tr>上onmouseover时<tr>的样式（css类名）
e.Row.Attributes.Add("onmouseover", "this.className = '" + this._cssClassMouseOver + "'");
// 样式的名称（css类名）
string cssClassMouseOut = "";
// 根据RowState的不同，onmouseout时<tr>的不同样式（css类名）
switch (e.Row.RowState)
{
case DataControlRowState.Alternate:
cssClassMouseOut = base.AlternatingRowStyle.CssClass;
break;
case DataControlRowState.Edit:
cssClassMouseOut = base.EditRowStyle.CssClass;
break;
case DataControlRowState.Normal:
cssClassMouseOut = base.RowStyle.CssClass;
break;
case DataControlRowState.Selected:
cssClassMouseOut = base.SelectedRowStyle.CssClass;
break;
default:
cssClassMouseOut = "";
break;
}
// 增加<tr>的dhtml事件onmouseout
e.Row.Attributes.Add("onmouseout", "this.className = '" + cssClassMouseOut + "'");
}
}
base.OnRowDataBound(e);
}