访问 EditedFormattedValue 时 Datagridview 单元格变黑？

Question

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 的功能吗，也许是我需要关闭的某种验证功能？

我在谷歌搜索时发现了一些其他提到这个问题的地方。似乎没有一个线程知道答案是什么：

这里不调用Application.DoEvents解决了问题，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会发生这种情况，但响应者建议将背景颜色设置为白色。这看起来像是黑客行为，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删除我的黑色背景。

添加者： 巴洛普

请注意，还有另一个原因，但由于此处的标题是editedformattedvalue，因此我将首先注意此示例。

涉及 EditedFormattedValue 作为原因的示例。

（当您双击单元格（从而进入编辑模式）时，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();



        }


        }
    }

在相关说明中，这是它变黑的另一个例子，尽管不是来自editedformattedvalue（之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，可以更快地切入它）。当常规自动大小设置打开时，该错误显示了一个问题 - 设置为所有单元格，并且特定的设置设置为“无”，那么根据您对语句的排序方式，它可能会出现错误，这一定是一个错误。设置任何特定的自动调整大小时，请将常规设置为关闭。

与调整大小相关的示例黑色

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; //A
dataGridView1.AutoSizeRowsMo​​de = DataGridViewAutoSizeRowsMo​​de.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;
        */


    }



}


}

相关 - https://connect.microsoft.com/VisualStudio/feedback/details/2878864/datagridview-cell-goes-black

Answer 1

好吧，虽然我无法弄清楚为什么会发生这种情况str=dataGridView1.CurrentCell.EditedFormattedValue，但我发现使用该str=dataGridView1.EditingControl.Text值会得到相同的值，并且不会扰乱单元格格式。所以，我想这可以解决我的问题。