删除与datagridview的单元格内容重叠的序列号？ [英] Remove serial number which are overlapping over the cell contents of datagridview sequentially?

问题描述

我想删除DataGridview单元格上重叠的数字。我该怎么办？

ScreenShot在这里：

[截图]

  private   void  SearchForm_Load（ object  sender，EventArgs e）
 {
 DataTable cmbTable =  new  DataTable（）; 
 DataGridViewTextBoxColumn dataGridViewTextBoxColumn =  default （DataGridViewTextBoxColumn）; 
  int  index =  0 ; 
  int  totalWidth =  0 ; 
 
  this  .WindowState = FormWindowState.Normal; 
 
 cmbTable.Columns.Add（  RecCode）; 
 cmbTable.Columns.Add（  TheName）; 
 
  //  设置datagrid列和宽度等 
 < span class =code-keyword> for （index =  0 ; index <  =  this  .displayColumns.Length  -   1 ; index ++）
 {
 dataGridViewTextBoxColumn =  new  DataGridViewTextBoxColumn（）; 
 dataGridViewTextBoxColumn.DataPropertyName =  this  .displayColumns [index]; 
 dataGridViewTextBoxColumn.HeaderText =  this  .displayHeaders [index]; 
 dataGridViewTextBoxColumn.Width =  this  .displayWidths [index]; 
  this  .DgSearch.Columns.Add（dataGridViewTextBoxColumn）; 
 
 totalWidth + =  this  .displayWidths [index]; 
 
  if （ this  .DgSearch.DataSource 是 DataTable）
 {
  this  .DgSearch.DataSource =（（DataTable）DgSearch.DataSource）.DefaultView; 
} 
 
  if （index ==  0 ）
 {
  this  .Text =  搜索：; 
} 
 
 cmbTable.Rows.Add（ new   object  [ ] { this  .displayColumns [index]， this  .displayHeaders [index]}）; 
} 
 
 此 .columnValue =  string  .Empty; 
 此 .Width = totalWidth +  25 ; 
 
  //  组合框中的列标题，用于选择搜索列名称 
  this  .CmbColumnName.DisplayMember =   TheName ; 
  this  .CmbColumnName.ValueMember =   RecCode ; 
  this  .CmbColumnName.DataSource = cmbTable; 
  this  .CmbColumnName.SelectedIndex =  0 ; 
} 

我的尝试：



检查datagridview的属性

这是下面的Paint方法

  protected  覆盖  void  OnRowPostPaint（DataGridViewRowPostPaintEventArgs e）
 { //  此方法会覆盖DataGridView的RowPostPaint事件 
  //  以便自动在行标题单元格上绘制数字 
  //  并自动调整包含 
  //  行标题单元格，以便它可以容纳新行 
  //  数字， 
 
  //  在'strRowNumber'中存储行号的字符串表示 
  string  strRowNumber =（e.RowIndex +  1 ）。ToString（）; 
 
  //  如果需要改进，则在字符串前加零 
  //  外观。例如，如果网格中有十行， 
  //  第七行将是编号为07而不是7。同样，如果 
  //  网格中有100行，第7行将被编号as007。 
  while （strRowNumber.Length <   this  .RowCount.ToString（）。Length）strRowNumber =   0  + strRowNumber; 
 
  //  使用 $ b确定行号字符串的显示大小$ b  //   DataGridView的当前字体。 
 SizeF size = e.Graphics.MeasureString（ strRowNumber， this  .Font）; 
 
  //  调整包含行标题单元格的列的宽度 
  //  如有必要 
  if （ this  .RowHeadersWidth < （ int ）（size.Width +  20 ）） this  .RowHeadersWidth =（ int ）（size.Width +  20 ）; 
 
  //  此画笔将用于在 
  //  使用系统当前ControlText颜色的行标题单元格 
 Brush b = SystemBrushes.ControlText; 
 
  //  使用在当前行标题单元格上绘制行号字符串
  //  上面定义的画笔和DataGridView的默认字体 
 e.Graphics .DrawString（strRowNumber， this  .Font，b，e.RowBounds.Location.X +  15 ，e .RowBounds.Location.Y +（（e.RowBounds.Height  -  size.Height）/  2 ））; 
 
  //  调用基础对象的OnRowPostPaint方法 
 碱 .OnRowPostPaint（E）; 
} 

解决方案

首先使用调试器确切地找出你放在那里的值 - 你的截图显示了一列，所以猜测你有一个宽度为零的秒。

同时检查你的DGV事件处理程序：如果你正在处理任何Cell或Row绘画事件以提供本地绘图，那可能造成这种影响。

我认为你应该是评论呼叫基础绘画方法：

 // base.OnRowPostPaint 

I want to remove the numbers overlapping on the cell of DataGridview. What should I do??
ScreenShot is here:
[Screenshot]

private void SearchForm_Load(object sender, EventArgs e)
        {
            DataTable cmbTable = new DataTable();
            DataGridViewTextBoxColumn dataGridViewTextBoxColumn = default(DataGridViewTextBoxColumn);
            int index = 0;
            int totalWidth = 0;

            this.WindowState = FormWindowState.Normal;

            cmbTable.Columns.Add("RecCode");
            cmbTable.Columns.Add("TheName");

            // set the datagrid columns and width etc
            for (index = 0; index <= this.displayColumns.Length - 1; index++)
            {
                dataGridViewTextBoxColumn = new DataGridViewTextBoxColumn();
                dataGridViewTextBoxColumn.DataPropertyName = this.displayColumns[index];
                dataGridViewTextBoxColumn.HeaderText = this.displayHeaders[index];
                dataGridViewTextBoxColumn.Width = this.displayWidths[index];
                this.DgSearch.Columns.Add(dataGridViewTextBoxColumn);

                totalWidth += this.displayWidths[index];

                if (this.DgSearch.DataSource is DataTable)
                {
                    this.DgSearch.DataSource = ((DataTable)DgSearch.DataSource).DefaultView;
                }

                if (index == 0)
                {
                    this.Text = "Search: ";
                }

                cmbTable.Rows.Add(new object[] { this.displayColumns[index], this.displayHeaders[index] });
            }

            this.columnValue = string.Empty;
            this.Width = totalWidth + 25;

            // Column Headers in combo box to select the search column name
            this.CmbColumnName.DisplayMember = "TheName";
            this.CmbColumnName.ValueMember = "RecCode";
            this.CmbColumnName.DataSource = cmbTable;
            this.CmbColumnName.SelectedIndex = 0;
        }

What I have tried:

Checking the Properties of datagridview
This is the Paint Method below

protected override void OnRowPostPaint(DataGridViewRowPostPaintEventArgs e)
        { //this method overrides the DataGridView's RowPostPaint event 
            //in order to automatically draw numbers on the row header cells
            //and to automatically adjust the width of the column containing
            //the row header cells so that it can accommodate the new row
            //numbers,

            //store a string representation of the row number in 'strRowNumber'
            string strRowNumber = (e.RowIndex + 1).ToString();

            //prepend leading zeros to the string if necessary to improve
            //appearance. For example, if there are ten rows in the grid,
            //row seven will be numbered as "07" instead of "7". Similarly, if 
            //there are 100 rows in the grid, row seven will be numbered as "007".
            while (strRowNumber.Length < this.RowCount.ToString().Length) strRowNumber = "0" + strRowNumber;

            //determine the display size of the row number string using
            //the DataGridView's current font.
            SizeF size = e.Graphics.MeasureString(strRowNumber, this.Font);

            //adjust the width of the column that contains the row header cells 
            //if necessary
            if (this.RowHeadersWidth < (int)(size.Width + 20)) this.RowHeadersWidth = (int)(size.Width + 20);

            //this brush will be used to draw the row number string on the
            //row header cell using the system's current ControlText color
            Brush b = SystemBrushes.ControlText;

            //draw the row number string on the current row header cell using
            //the brush defined above and the DataGridView's default font
            e.Graphics.DrawString(strRowNumber, this.Font, b, e.RowBounds.Location.X + 15, e.RowBounds.Location.Y + ((e.RowBounds.Height - size.Height) / 2));

            //call the base object's OnRowPostPaint method
            base.OnRowPostPaint(e);
        }

解决方案

Start by using the debugger to find out exactly what values you are putting in there - your screenshot shows just one column, so at a guess you have a second with a zero width.
Also check your DGV event handlers: if you are processing any of the Cell or Row painting events to provide local drawing, that could be causing the effect.

I think you should be comment call base painting method:

//base.OnRowPostPaint

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