Datagridview單元格工具提示自動換行

Question

我有一個datagridview在一列中有很長的字符串。當我將鼠標懸停在它上面時，默認的一行，工具提示不足以顯示整個內容。任何想法如何在datagridview工具提示中換行文字？

Answer 1

試試這個例子：

private void dgvProducts_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) 
{   
    if ((e.ColumnIndex == dgvProducts.Columns["colDescription"].Index) && e.Value != null) 
    { 
     DataGridViewCell cell = dgvProducts.Rows[e.RowIndex].Cells[e.ColumnIndex]; 
     cell.ToolTipText = String.Join(Environment.NewLine, e.Value.ToString().DivideLongString()); 
    } 
} 

//-------------- Extension Methods ------------- C# 6.0 

using static System.String; 

public static class Extensions 
{ 
    public static string[] DivideLongString(this string text, int length = 10) 
    { 
     if (text.Length <= length) return new[] { text }; 
     var words = text.GetTotalWords(); 
     var output = new string[(words.Length % length > 1 ? words.Length/length + 1 : words.Length % length < 1 ? words.Length/length - 1 : words.Length/length) + 100]; 
     var oIndex = 0; 
     var wIndex = length - 1; 
     try 
     { 
      for (var i = 0; i < words.Length; i++) 
      { 
       if (wIndex < i) 
       { 
        wIndex += length - 1; 
        oIndex++; 
       } 
       output[oIndex] += $"{words[i]} "; 
      } 
      if (output.Length > 2 && !IsNullOrEmpty(output[output.Length - 1]) && output[output.Length - 1].CountWords() < 3) 
      { 
       output[output.Length - 2] += output[output.Length - 1]; 
       output[output.Length - 1] = Empty; 
      } 
      return output.Where(val => !IsNullOrEmpty(val)).ToArray(); 
     } 
     catch (Exception ex) 
     { 
      ExceptionLogger.Log(ex); 
      return output.Where(val => !IsNullOrEmpty(val)).ToArray(); 
     } 
    } 

    public static string ReplaceMultipleSpacesWith(this string text, string newString) 
    { 
     return Regex.Replace(text, @"\s+", newString); 
    } 

    public static string[] GetTotalWords(this string text) 
    { 
     text = text.Trim().ReplaceMultipleSpacesWith(" "); 
     var words = text.Split(' '); 
     return words; 
    } 
}