我有一个使用datagridview的winforms应用程序。当我在编辑模式下访问单元格的EditedFormattedValue时,有时整个单元格变为黑色。这是datagridview的一个功能,也许是我需要关闭的某种验证功能吗?
我在google搜索时发现了其他一些关于此问题的提及。没有一个线程似乎知道答案是什么:
这里没有调用Application.DoEvents解决了这个问题,但我没有调用DoEvents http://www.tek-tips.com/viewthread.cfm?qid=1277303&page=1
http://social.msdn.microsoft.com/Forums/en/winformsdatacontrols/thread/d9bf784d-617d-4a35-8125-fe8f67987fa2
这里没有人知道它为什么会发生,但响应者建议将背景颜色设置为白色。这似乎是一个黑客,我想知道为什么会发生这种情况。此外,更改背景颜色不会删除黑色背景。
由barlop添加
请注意还有另一个原因,但由于这里的标题是编辑格式化的,我首先会注意到这个例子。
将EditedFormattedValue作为原因的示例。
(双击单元格时(因此进入编辑模式),它会变黑)
namespace simpleblackdgv2
{
public partial class Form1 : Form
{
DataGridView dataGridView1 = new DataGridView();
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
// BUG IS THAT WHEN YOU DOUBLE CLICK A CELL, IT GOES BLACK
dataGridView1.Columns.Add("Column1", "Column1");
dataGridView1.Rows.Add(1);
dataGridView1.AllowUserToAddRows = false;
this.Controls.Add(dataGridView1);
dataGridView1.EditingControlShowing += DataGridView1_EditingControlShowing;
}
private void DataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
// doesn't work
string str = dataGridView1.CurrentCell.EditedFormattedValue.ToString();
}
}
}
在相关的说明中,这是它变黑的另一个例子,虽然不是来自editedformattedvalue(此问题的先前编辑有一个更长的例子,这是一个更简单的切割它)。当常规自动调整大小设置打开时,该错误显示一个问题 - 设置为allcells,并且特定的一个设置为None,然后根据您对语句的排序方式,它可能会出错,这必定是一个错误。设置任何特定的自动调整大小时,将常规设置为关闭。
与调整大小相关的黑色示例
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;
namespace blackdgvcellexample {
public partial class Form1 : Form {
DataGridView dataGridView1;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
// autosize rows may be meaningless without that.
//dataGridView1.DefaultCellStyle.WrapMode = DataGridViewTriState.True;
dataGridView1 = new DataGridView();
this.Controls.Add(dataGridView1);
dataGridView1.Columns.Add("Column1", "Column1");
dataGridView1.Columns.Add("Column2", "Column2");
dataGridView1.Columns.Add("Column3", "Column3");
dataGridView1.AllowUserToAddRows = false;
dataGridView1.Rows.Add(5);
//dataGridView1.Rows.Add(1);
dataGridView1.EditingControlShowing += DataGridView1_EditingControlShowing;
}
private void DataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
dataGridView1.DefaultCellStyle.WrapMode = DataGridViewTriState.True;
//dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //A
// dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells; //B
// dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells; //C
// B-Cols, C-rows
// A, ~B, ~C WORKS
// A,B, ~C WORKS
// A,~B,C WORKS
// A,B,C WORKS
// SO IT WAS THE ORDER OF THE LINES THAT MAKES A DIFFERENCE!!!!
// --- trying not turning any off
// dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //A
// dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells; //B
// dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells; //C
// Cols, Rows, A BLACK FIRST CELL REST FINE
// rows, Cols, A BLACK FIRST CELL REST FINE
// cols,A,rows FINE
// rows,A,cols BLACK FIRST CELL REST FINE
// A, rows, cols BLACK FIRST CELL
// A, cols, rows FINE
// perhaps unnecessary to autoaize rows.
dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //A
dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
// this works
/*
dataGridView1.Columns [0] .AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //一个
dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
* /
/*
* this works
dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //A
*/
/*
doesn't work
dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //A
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
*/
// doesn't work
// dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
// dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //A
// so don't mix them. ok
// this doesn't work
// dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;
// dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //A
// these 3 work in any order
// dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;
// dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None;
// dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells; //A
// don't mix them.
// if you are going to mix them, then turn the generals off and do specifics.
// this won't work
// dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
// dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
// dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.None; //A
// this works, probably any order too.
/*
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;
dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None;
dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
dataGridView1.Columns[1].AutoSizeMode = DataGridViewAutoSizeColumnMode.None;
dataGridView1.Columns[2].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
*/
}
}
}
related- https://connect.microsoft.com/VisualStudio/feedback/details/2878864/datagridview-cell-goes-black
答案 0 :(得分:3)
好吧,虽然我无法弄清楚为什么str=dataGridView1.CurrentCell.EditedFormattedValue
会发生这种情况,但我发现使用str=dataGridView1.EditingControl.Text
值会得到相同的值并且不会弄乱单元格格式。所以,我想这解决了我的问题。
答案 1 :(得分:1)
现在提到这个问题
https://connect.microsoft.com/VisualStudio/feedback/details/2878864/datagridview-cell-goes-black
除了dvcolgan提到的解决方法,它仅适用于editedformattedvalue的情况。
在ms bug链接中提到的viorel有一个解决方法,我已经测试并且工作,这是用
包围代码 BeginInvoke( new Action( ( ) =>
{
. . .
} ) );
上述BeginInvoke技术适用于两种情况。