如何动态控制DBGRID的列宽

2006-07-25 03:00:53 413 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

C++剑指offer:[POJ]2631 Roads in the North - 用树形DP的方式求出一棵树的直径前言此题是道很简单的题（做法不单一，不仅只有树形DP的方法）做完了这道题才发现此题原来是一道求树的直径的题，也就是求树上两个节点的最大距离。题目问题 N(2692): [POJ2631]北极地区的路时间限制:1 Sec内存限制:128 MB 题目描述寒冷、人烟稀少的北极地区修建与维护道路时非常昂贵的。因此，修路时只会在任意两个村子之间形成一条唯一的路径，并且中途... 阅读详情

adoquer->SQL->Add("select shiffrequerror.meterid as 表编号 ,shiffrequerror.step as 档位, shiffrequerror.standvoltage as 标准电压电流, shiffrequerror.standunit as 标准电压电流单位, shiffrequerror.upperfrequ as F上, shiffrequerror.uppervoltage as F上电压电流 ,shiffrequerror.upperunit as F上电压电流单位, shiffrequerror.uppererror as F上电压电流误差, shiffrequerror.downfrequ as F下,shiffrequerror.downvoltage as F下电压电流, shiffrequerror.downunit as F下电压电流单位, shiffrequerror.downerror as F下电压电流误差, shiffrequerror.centerfrequ as F中, shiffrequerror.centervoltage as F中电压电流, shiffrequerror.centerunit as F中电压电流单位,shiffrequerror.centererror as F中电压电流误差, shiffrequerror.lowfrequ as F低");
adoquer->SQL->Add(+"from shiffrequerror ");

DBGrid1->Columns->Items[2]->Width =10000; // 这样不行,不知道为什么

大家可以看到我的字段很多, 我想控制每个列的宽度,可是控制不了该怎么样解决.

静态的方法就不要说了 !

...全文

POJ 2631Roads in the North【树的直径】【模板题】 POJ 2631:Roads in the North 总时间限制: 1000ms 内存限制: 65536kB 描述 Building and maintaining roads among communities in the far North is an expensive business. With this in mind, the roads are bu... 阅读详情

wanglovec

数据库及相关技术 1,178 成员 18,938 内容

+ 关注 + 加入社区

切换为时间正序

wanglovec 2006-07-28

打赏
举报

问题已解决　：
　　代码如下：（为别的兄弟准备　呵呵）

adoquer->SQL->Add("select shiffrequerror.meterid as 表编号 ,shiffrequerror.step as 档位, shiffrequerror.standvoltage as 标准电压电流, shiffrequerror.standunit as 标准电压电流单位, shiffrequerror.upperfrequ as F上, shiffrequerror.uppervoltage as F上电压电流 ,shiffrequerror.upperunit as F上电压电流单位, shiffrequerror.uppererror as F上电压电流误差, shiffrequerror.downfrequ as F下,shiffrequerror.downvoltage as F下电压电流, shiffrequerror.downunit as F下电压电流单位, shiffrequerror.downerror as F下电压电流误差, shiffrequerror.centerfrequ as F中, shiffrequerror.centervoltage as F中电压电流, shiffrequerror.centerunit as F中电压电流单位,shiffrequerror.centererror as F中电压电流误差, shiffrequerror.lowfrequ as F低,shiffrequerror.truename as 检验人,shiffrequerror.riqi as 日期");
adoquer->SQL->Add(+"from shiffrequerror ");

Form7->DBGrid1->Columns->Clear() ;
TColumn*NewCol;
NewCol = Form7->DBGrid1->Columns->Add();
NewCol->Width = 90;

TColumn*NewCo2;
NewCo2 = Form7->DBGrid1->Columns->Add();
NewCo2->Width = 90;

TColumn*NewCo3;
NewCo3 = Form7->DBGrid1->Columns->Add();
NewCo3->Width = 90;

TColumn*NewCo4;
NewCo4 = Form7->DBGrid1->Columns->Add();
NewCo4->Width = 90;

TColumn *NewCo5;
NewCo5 = Form7->DBGrid1->Columns->Add();
NewCo5->Width = 90;

TColumn*NewCo6;
NewCo6 = Form7->DBGrid1->Columns->Add();
NewCo6->Width = 90;

TColumn*NewCo7;
NewCo7 = Form7->DBGrid1->Columns->Add();
NewCo7->Width = 90;

TColumn*NewCo8;
NewCo8 = Form7->DBGrid1->Columns->Add();
NewCo8->Width = 90;

TColumn*NewCo9;
NewCo9 = Form7->DBGrid1->Columns->Add();
NewCo9->Width = 90;

TColumn*NewCol0;
NewCol0 = Form7->DBGrid1->Columns->Add();
NewCol0->Width = 90;

TColumn*NewCo11;
NewCo11 = Form7->DBGrid1->Columns->Add();
NewCo11->Width = 90;

TColumn*NewCo12;
NewCo12 = Form7->DBGrid1->Columns->Add();
NewCo12->Width = 90;

TColumn*NewCol3;
NewCol3 = Form7->DBGrid1->Columns->Add();
NewCol3->Width = 90;

TColumn*NewCo14;
NewCo14 = Form7->DBGrid1->Columns->Add();
NewCo14->Width = 90;

TColumn*NewCo15;
NewCo15= Form7->DBGrid1->Columns->Add();
NewCo15->Width = 90;

TColumn*NewCol6;
NewCol6 = Form7->DBGrid1->Columns->Add();
NewCol6->Width = 90;

TColumn*NewCo17;
NewCo17 = Form7->DBGrid1->Columns->Add();
NewCo17->Width = 90;

TColumn*NewCo18;
NewCo18= Form7->DBGrid1->Columns->Add();
NewCo18->Width = 90;

NewCol->FieldName = "表编号";
NewCo2->FieldName = "档位";
NewCo3->FieldName = "标准电压电流";
NewCo4->FieldName = "标准电压电流单位";
NewCo5->FieldName = "F上";
NewCo6->FieldName = "F上电压电流";
NewCo7->FieldName = "F上电压电流单位";
NewCo8->FieldName = "F上电压电流误差";
NewCo9->FieldName = " F下";
NewCol0->FieldName = "F下电压电流";
NewCo11->FieldName = "F下电压电流单位";
NewCo12->FieldName = "F下电压电流误差";
NewCol3->FieldName = "F中";
NewCo14->FieldName = "F中电压电流单位";
NewCo15->FieldName = "F中电压电流误差";
NewCol6->FieldName = "F低";
NewCo17->FieldName = "检验人";
NewCo18->FieldName = "日期";
adoquer->Open();
Form7->DataSource1->DataSet =adoquer;
Form7->DBGrid1->DataSource = Form7->DataSource1;

只是这样不知道是否会导致内存泄露什么的　？？

BlueDeepOcean 2006-07-25

打赏
举报

头晕。

leo201592 2006-07-25

打赏
举报

TColumn *NewCol;
NewCol = DBGrid2->Columns->Add();
NewCol->FieldName = "ID_NO";
NewCol->Width = 90;

wanglovec 2006-07-25

打赏
举报

不行，就算改为１００　也报同样错误　＂list index out of bounds(1)＂

Persistent8813 2006-07-25

打赏
举报

10000有多宽啊？？？

Persistent8813 2006-07-25

打赏
举报

应该可以的

wanglovec 2006-07-25

打赏
举报

怎么没人帮个忙呀　急等呀

如何动态控制DBGRID的列宽

相关推荐