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
答案 0 :(得分:0)
这是我遵循的过程:
[...]
,将WrapMode设置为True AutoSizeRowsMode
设置为AllCells 答案 1 :(得分:0)
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: