是否可以在DataGridView
的行标题中显示行号?
我正在尝试使用此代码,但它不起作用:
private void setRowNumber(DataGridView dgv)
{
foreach (DataGridViewRow row in dgv.Rows)
{
row.HeaderCell.Value = row.Index + 1;
}
}
我是否必须设置一些DataGridView
属性?
答案 0 :(得分:51)
您还可以在RowPostPaint
事件中动态绘制字符串:
private void dgGrid_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
{
var grid = sender as DataGridView;
var rowIdx = (e.RowIndex + 1).ToString();
var centerFormat = new StringFormat()
{
// right alignment might actually make more sense for numbers
Alignment = StringAlignment.Center,
LineAlignment = StringAlignment.Center
};
var headerBounds = new Rectangle(e.RowBounds.Left, e.RowBounds.Top, grid.RowHeadersWidth, e.RowBounds.Height);
e.Graphics.DrawString(rowIdx, this.Font, SystemBrushes.ControlText, headerBounds, centerFormat);
}
答案 1 :(得分:47)
似乎它没有把它变成一个字符串。 试试
row.HeaderCell.Value = String.Format("{0}", row.Index + 1);
答案 2 :(得分:9)
谢谢@Gabriel-Perez和@Groo,好主意!如果其他人想要它,这是在Visual Studio 2012中测试的VB版本。 在我的情况下,我希望数字显示在行标题的右上方。
Private Sub MyDGV_RowPostPaint(sender As Object, _
e As DataGridViewRowPostPaintEventArgs) Handles MyDataGridView.RowPostPaint
' Automatically maintains a Row Header Index Number
' like the Excel row number, independent of sort order
Dim grid As DataGridView = CType(sender, DataGridView)
Dim rowIdx As String = (e.RowIndex + 1).ToString()
Dim rowFont As New System.Drawing.Font("Tahoma", 8.0!, _
System.Drawing.FontStyle.Bold, _
System.Drawing.GraphicsUnit.Point, CType(0, Byte))
Dim centerFormat = New StringFormat()
centerFormat.Alignment = StringAlignment.Far
centerFormat.LineAlignment = StringAlignment.Near
Dim headerBounds As Rectangle = New Rectangle(_
e.RowBounds.Left, e.RowBounds.Top, _
grid.RowHeadersWidth, e.RowBounds.Height)
e.Graphics.DrawString(rowIdx, rowFont, SystemBrushes.ControlText, _
headerBounds, centerFormat)
End Sub
您还可以获取默认字体rowFont = grid.RowHeadersDefaultCellStyle.Font
,但它可能看起来不太好。下面的截图使用的是Tahoma字体。
答案 3 :(得分:9)
private void setRowNumber(DataGridView dgv)
{
foreach (DataGridViewRow row in dgv.Rows)
{
row.HeaderCell.Value = (row.Index + 1).ToString();
}
}
这对我有用。
答案 4 :(得分:5)
只是增强上面的解决方案..所以标题自我调整宽度以适应像12345这样冗长的字符串
private void advancedDataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
{
var grid = sender as DataGridView;
var rowIdx = (e.RowIndex + 1).ToString();
var centerFormat = new StringFormat()
{
// right alignment might actually make more sense for numbers
Alignment = StringAlignment.Center,
LineAlignment = StringAlignment.Center
};
//get the size of the string
Size textSize = TextRenderer.MeasureText(rowIdx, this.Font);
//if header width lower then string width then resize
if (grid.RowHeadersWidth < textSize.Width + 40)
{
grid.RowHeadersWidth = textSize.Width + 40;
}
var headerBounds = new Rectangle(e.RowBounds.Left, e.RowBounds.Top, grid.RowHeadersWidth, e.RowBounds.Height);
e.Graphics.DrawString(rowIdx, this.Font, SystemBrushes.ControlText, headerBounds, centerFormat);
}
答案 5 :(得分:4)
你可以这样做:
private void setRowNumber(DataGridView dgv)
{
foreach (DataGridViewRow row in dgv.Rows)
{
row.HeaderCell.Value = row.Index + 1;
}
dgv.AutoResizeRowHeadersWidth(DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders);
}
答案 6 :(得分:1)
row.HeaderCell.Value = row.Index + 1;
当应用于具有大量行的datagridview时会产生内存泄漏,最终会导致内存不足问题。任何想法如何回收记忆?
以下是应用于包含某些列的空网格的示例代码。它只是添加行和数字索引。重复按钮几次。
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
dataGridView1.SuspendLayout();
for (int i = 1; i < 10000; i++)
{
dataGridView1.Rows.Add(i);
}
dataGridView1.ResumeLayout();
}
private void button1_Click(object sender, EventArgs e)
{
foreach (DataGridViewRow row in dataGridView1.Rows)
row.HeaderCell.Value = (row.Index + 1).ToString();
}
}
答案 7 :(得分:0)
这对我有用。
Private Sub GridView1_CellFormatting(sender As Object, e As DataGridViewCellFormattingEventArgs) Handles GridView1.CellFormatting
Dim idx As Integer = e.RowIndex
Dim row As DataGridViewRow = VDataGridView1.Rows(idx)
Dim newNo As Long = idx
If Not _RowNumberStartFromZero Then
newNo += 1
End If
Dim oldNo As Long = -1
If row.HeaderCell.Value IsNot Nothing Then
If IsNumeric(row.HeaderCell.Value) Then
oldNo = CLng(row.HeaderCell.Value)
End If
End If
If newNo <> oldNo Then 'only change if it's wrong or not set
row.HeaderCell.Value = newNo.ToString()
row.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleRight
End If
End Sub
答案 8 :(得分:0)
这项工作,用c#
private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
int idx = e.RowIndex;
DataGridViewRow row = dataGridView1.Rows[idx];
long newNo = idx;
if (!_RowNumberStartFromZero)
newNo += 1;
long oldNo = -1;
if (row.HeaderCell.Value != null)
{
if (IsNumeric(row.HeaderCell.Value))
{
oldNo = System.Convert.ToInt64(row.HeaderCell.Value);
}
}
if (newNo != oldNo)
{
row.HeaderCell.Value = newNo.ToString();
row.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleRight;
}
}
答案 9 :(得分:0)
private void ShowRowNumber(DataGridView dataGridView)
{
dataGridView.RowHeadersWidth = 50;
for (int i = 0; i < dataGridView.Rows.Count; i++)
{
dataGridView.Rows[i].HeaderCell.Value = (i + 1).ToString();
}
}
答案 10 :(得分:0)
基于以下视频:VB.net-Auto generate row number to datagridview in windows application-winforms,您可以设置数据源,并且此代码放置行号,就像超级按钮一样。
private void DataGrid_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
// Add row number
(sender as DataGridView).Rows[e.RowIndex].HeaderCell.Value = (e.RowIndex+1).ToString();
}