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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，有时整个单元格会变黑。这是datagridview的功能，也许某种我需要关闭的验证功能？访问EditedFormattedValue时Datagridview单元格变黑？
我发现了其他一些提到这个问题，同时谷歌搜索。没有一个线程似乎知道答案是什么：
这里不调用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
这里没有人知道为什么发生，但响应者建议设置背景颜色为白色。这似乎是一个黑客，我想知道为什么会发生这种情况。另外，更改背景颜色并不会为我删除黑色背景。
添加人barlop
注意，这样做的另一个原因，但由于这里的标题是editedformattedvalue，我会首先注意到这个例子。
涉及EditedFormattedValue作为原因的示例。
（当你双击单元格，（从而进入编辑模式），它变黑）
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();
}
}
}
与此相关的，这是它的另一个例子去黑，虽然不是从editedformattedvalue（以前对这个问题的编辑有一个更长的例子，这是一个更简单的例子，可以更快地切入）。当一般的autosize设置开启 - 设置为allcells，并且一个特定的设置为None时，bug会显示问题，然后它可能会出现错误，这取决于您如何排列语句，这必须是一个错误。设置任何特定的自动调整大小时，将常规设置为关闭。
实施例黑有关调整
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; //数据网格模型= */
/*
* 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;
*/
}
}
}
所关乎https://connect.microsoft.com/VisualStudio/feedback/details/2878864/datagridview-cell-goes-black
请注意，在调整列大小的示例中，可以通过缩小整个事物来避免（或者通过计算为什么它发生在只有一个列并解决这个问题时，虽然还没有找到答案） – barlop 2016-07-29 23:52:01