我的DGV填充了用户输入的值(不是数据绑定的)。行计数是动态的。但是,即使使用默认的五行,从单元格到单元格以及从一行到另一行的选项卡导致第一行(第0行)在我到达最后一个(第五行)/第4行时“向上和向下”DGV消失。
我希望5行(或多行)始终保持在同一位置,而不是根据光标的位置移动。
我不知道为什么这是这种情况下的默认行为,我很好奇,但大多数情况下只需要知道如何防止这种离奇。
当用户添加其他行时,我会像这样计算每行的高度:
dataGridViewPlatypi.Rows.Add();
int newRowHeight = dataGridViewPlatypi.Height / dataGridViewPlatypi.RowCount;
for (int i = 0; i < dataGridViewPlatypi.RowCount; i++)
{
dataGridViewPlatypi.Rows[i].Height = newRowHeight;
}
...这个不精确的数学可以在分区有余数/模数时在网格底部产生一些“额外空间”,例如:当有六行时,每行的高度为26并且离开网格底部有4个像素 - 但是,当160像素高的DGV(每行32个像素)中隐藏了5行时,甚至会发生这种令人不安的行为。
我不知道是否需要设置一些属性或为DGV,行,单元格或......写一些代码...... ???
我发现如果我在设计时将DGV的高度加上2(162而不是160,那么每行为32,并且剩下的DGV有2个像素),它可以使用默认的5行。
然而,试图让用户在添加额外行时进行调整会产生问题。以下kludgy代码不起作用:
// Adding one extra pixel is not enough; 2 is the least that can be added to prevent the last phantom grey row from appearing
const int BASE_GRID_HEIGHT_SHIM = 2;
const int DEFAULT_ROW_COUNT = 5;
dataGridViewPlatypi.Rows.Add();
int shimAdjustment = dataGridViewPlatypi.RowCount - DEFAULT_ROW_COUNT;
int newRowHeight = dataGridViewPlatypi.Height / dataGridViewPlatypi.RowCount;
int newGridHeight = (newRowHeight * dataGridViewPlatypi.RowCount) + BASE_GRID_HEIGHT_SHIM + shimAdjustment;
for (int i = 0; i < dataGridViewPlatypi.RowCount; i++)
{
dataGridViewPlatypi.Rows[i].Height = newRowHeight;
}
dataGridViewPlatypi.Size = new Size(dataGridViewPlatypi.Width, newGridHeight);
注意:单击第0列时,不会向上推行以隐藏第0行并显示DGV的软灰色下腹部;只有在从其中一个列到下一列的标签之后才发生这种“向上推”(FWIW)。
这就是我应用丰富答案的方式。
private void buttonAddRow_Click(object sender, EventArgs e)
{
AddAPlatypusRow();
for (int i = 0; i < dataGridViewPlatypi.RowCount; i++)
{
FreezeBand(dataGridViewPlatypi.Rows[i]);
}
}
答案 0 :(得分:3)
以下是使用DataGridView的DataGridViewBand类冻结任何行或列的完整示例。
简而言之,您只需要:
注意:您甚至可以根据需要冻结乐队的 BackColor 。虽然在样本中是WhiteSmoke(灰色)。
private static void FreezeBand(DataGridViewBand band)
{
band.Frozen = true;
DataGridViewCellStyle style = new DataGridViewCellStyle();
style.BackColor = Color.WhiteSmoke;
band.DefaultCellStyle = style;
}
要查看Microsoft的DataGridViewBandDemo
的完整演示要查看快速演示,请创建常规Visual Studio,C#Windows应用程序项目,并使用以下代码填充Program.cs文件。
using System.Drawing;
using System.Windows.Forms;
using System;
public class DataGridViewBandDemo : Form
{
#region "form setup"
public DataGridViewBandDemo()
{
InitializeComponent();
InitializeDataGridView();
}
DataGridView dataGridView;
FlowLayoutPanel FlowLayoutPanel1 = new FlowLayoutPanel();
private void InitializeComponent()
{
FlowLayoutPanel1.Location = new Point(454, 0);
FlowLayoutPanel1.AutoSize = true;
FlowLayoutPanel1.FlowDirection = FlowDirection.TopDown;
AutoSize = true;
ClientSize = new System.Drawing.Size(614, 360);
FlowLayoutPanel1.Name = "flowlayoutpanel";
Controls.Add(this.FlowLayoutPanel1);
Text = this.GetType().Name;
}
#endregion
#region "setup DataGridView"
private void InitializeDataGridView()
{
dataGridView = new System.Windows.Forms.DataGridView();
Controls.Add(dataGridView);
dataGridView.Size = new Size(300, 200);
// Create an unbound DataGridView by declaring a
// column count.
dataGridView.ColumnCount = 4;
// Set the column header style.
DataGridViewCellStyle columnHeaderStyle =
new DataGridViewCellStyle();
columnHeaderStyle.BackColor = Color.Aqua;
columnHeaderStyle.Font =
new Font("Verdana", 10, FontStyle.Bold);
dataGridView.ColumnHeadersDefaultCellStyle =
columnHeaderStyle;
// Set the column header names.
dataGridView.Columns[0].Name = "Recipe";
dataGridView.Columns[1].Name = "Category";
dataGridView.Columns[2].Name = "Whatever";
dataGridView.Columns[3].Name = "Rating";
// Populate the rows.
string[] row1 = new string[]{"Meatloaf",
"Main Dish", "boringMeatloaf", "boringMeatloafRanking"};
string[] row2 = new string[]{"Key Lime Pie",
"Dessert", "lime juice, evaporated milk", "****"};
string[] row3 = new string[]{"Orange-Salsa Pork Chops",
"Main Dish", "pork chops, salsa, orange juice", "****"};
string[] row4 = new string[]{"Black Bean and Rice Salad",
"Salad", "black beans, brown rice", "****"};
string[] row5 = new string[]{"Chocolate Cheesecake",
"Dessert", "cream cheese", "***"};
string[] row6 = new string[]{"Black Bean Dip", "Appetizer",
"black beans, sour cream", "***"};
string[] row7 = new string[]{"Black Bean Dip", "Appetizer",
"black beans, sour cream", "***"};
string[] row8 = new string[]{"Jelly beans", "Appetizer",
"black beans, sour cream", "***"};
string[] row9 = new string[]{"Barracuda", "Appetizer",
"black beans, sour cream", "***"};
object[] rows = new object[] { row1, row2, row3, row4, row5, row6, row7, row8, row9 };
foreach (string[] rowArray in rows)
{
dataGridView.Rows.Add(rowArray);
}
dataGridView.ColumnHeadersVisible = false; // This hides regular column header
FreezeFirstRow();
// FreezeFirstColumn(); // Uncomment this line to freeze first column
}
// Freeze the first row.
private void FreezeFirstRow()
{
FreezeBand(dataGridView.Rows[0]);
}
private void FreezeFirstColumn()
{
FreezeBand(dataGridView.Columns[1]);
}
private static void FreezeBand(DataGridViewBand band)
{
band.Frozen = true;
DataGridViewCellStyle style = new DataGridViewCellStyle();
style.BackColor = Color.WhiteSmoke;
band.DefaultCellStyle = style;
}
#endregion
[STAThreadAttribute()]
public static void Main()
{
Application.Run(new DataGridViewBandDemo());
}
}
嗯,这是我最好的拍摄:)
答案 1 :(得分:1)
我知道您没有使用数据绑定DGV,但是,以下链接之一可能会为您提供解决方案的一些见解。