Question

您好，我正在使用数据库中的动态数据制作备忘录类型的数据网格并且以某种方式我无法使行自动调整大小。我几乎尝试了所有事情，这是我放在Form Load子菜单中的一些代码片段：

    DataGridView2.Columns(0).AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells
    DataGridView2.Columns(1).AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells
    DataGridView2.Columns(2).AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill
    DataGridView2.Columns(2).DefaultCellStyle.WrapMode = DataGridViewTriState.True
    DataGridView2.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders

这样出来的：

之后，我尝试在DataGridView2.CellPainting事件上使用此功能

    If e.Value Is Nothing Then Return
    Dim s = e.Graphics.MeasureString(e.Value.ToString(), DataGridView2.Font)

    If s.Width > DataGridView2.Columns(e.ColumnIndex).Width Then

        Using gridBrush As Brush = New SolidBrush(DataGridView2.GridColor), backColorBrush As Brush = New SolidBrush(e.CellStyle.BackColor)

            Using gridLinePen As Pen = New Pen(gridBrush)
                e.Graphics.FillRectangle(backColorBrush, e.CellBounds)
                e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right, e.CellBounds.Bottom - 1)
                e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1)
                e.Graphics.DrawString(e.Value.ToString(), DataGridView2.Font, Brushes.Black, e.CellBounds, StringFormat.GenericDefault)
                DataGridView2.Rows(e.RowIndex).Height = CInt((s.Height * Math.Ceiling(s.Width / DataGridView2.Columns(e.ColumnIndex).Width)))
                e.Handled = True
            End Using
        End Using
    End If

是这样的：

试图摆弄所有属性，但我似乎无法弄清楚，谢谢您

Answer 1

这是我遵循的过程：

将新的datagridview拖放到表单上（实际上我将其拖出了数据源窗口，因为我已经在项目中有了数据集了）

选择编辑列，选择一列，为其中一个字符串列单击DefaultCellStyle旁边的[...]，将WrapMode设置为True

将DGV的AutoSizeRowsMode设置为AllCells

将一个长字符串插入到dgv绑定的基础数据表中：

结果包装：

Answer 2

您可以考虑在DataGridView中将元素居中：

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

double get_optimal_value(int capacity, vector<int> weights, vector<int> values) {
  double value = 0.0;
  int n = weights.size();
  vector<pair<double, int>> valuePerWeight(n);
  pair<double,int> x;
  for(int i = 0; i < n; i++){

    double v = values[i]/weights[i];
    cout << v << ' '<< weights[i] << '\n';
    x = make_pair(values[i]/weights[i], weights[i]);
    cout << x.first << ' ' << x.second << '\n';

    valuePerWeight.push_back(x);
    cout << valuePerWeight[i].first << ' ' << valuePerWeight[i].second << '\n';
  }


  for(int i = 0; i < n; i++){
    cout << valuePerWeight[i].first;
    cout << valuePerWeight[i].second;

    cout << '\n';
  }

  sort(valuePerWeight.begin(), valuePerWeight.end());

  for(int i = 0; i < n && capacity > 0; i++){
    int amount = min(capacity, valuePerWeight[i].second);
    value += valuePerWeight[i].first * amount;
    capacity -= amount;
  }



  // for(auto vp: valuePerWeight){
  //   cout << vp.first << vp.second;
  //   cout << '\n';
  // }

  return value;
}

int main() {
  int n;
  int capacity;
  std::cin >> n >> capacity;
  vector<int> values(n);
  vector<int> weights(n);
  for (int i = 0; i < n; i++) {
    std::cin >> values[i] >> weights[i];
  }

  double optimal_value = get_optimal_value(capacity, weights, values);

  std::cout.precision(10);
  std::cout << optimal_value << std::endl;
  return 0;
}

结果如下：

VB.net中Datagridview的自动调整行大小不起作用

2 个答案: