WINFORM 多条件动态查询 通用代码的设计与实现

http://blog.csdn.net/huomm/archive/2008/03/22/2205564.aspx

经常碰到多条件联合查询的问题,以前的习惯认为很简单总会从头开始设计布局代码,往往一个查询面要费上老半天的功夫,而效果也不咋地。

     前段时间做了个相对通用的多条件动态查询面,复用起来还是挺方便的,放上来共参考指导 。
                                                                         供下载的源文件链接  :   多条件动态查询通用模板下载

主要的运行后布局:

    主要的通用功能和要求:

主要的方法体:

  动态的显示查询条件:

按查询条件设置显示模式:

1 //初始化联合查询的页面显示
2
3 private void ConditionBind()
4 {
5 /**/////查询条件邦定
6            DataTable dt = new DataTable();
7            DataColumnCollection columns = dt.Columns;
8            columns.Add("name");
9            columns.Add("key");
10            DataRowCollection rows = dt.Rows;
11            rows.Add("所有", "All");
12            rows.Add("单据号", "Code");
13            rows.Add("供应商名称", "SupplierName");
14            rows.Add("经办人", "EmployeesName");
15            rows.Add("时间", "time");
16
17
18 try
19 {
20 for (int i = 0; i < this.fpl.Controls.Count; i++)
21 {
22
23 if (this.Controls.Find("fpl" + i, true).Length > 0)
24 {
25                        ((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).DisplayMember = "name";
26                        ((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).ValueMember = "key";
27 //用copy解决联动问题
28                        ((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).DataSource = dt.Copy();
29                    }
30
31                }
32
33
34            }
35 catch (Exception ex)
36 {
37                MessageBox.Show(ex.Message);
38            }
39
40
41
42        }

1 private void SetFilterCondition(ref ComboBox conditionselect)
2 {
3 try
4 {
5 for (int i = 0; i < this.fpl.Controls.Count; i++)
6 {
7 if (conditionselect.Name == "cbSelect" + i.ToString())
8 {
9 if (conditionselect.Text == "时间")
10 {
11 if (this.Controls.Find("fplFilter" + i, true).Length > 0)
12 this.Controls.Find("fplFilter" + i, true)[0].Visible = true;
13 if (this.Controls.Find("txtFilter" + i, true).Length > 0)
14 this.Controls.Find("txtFilter" + i, true)[0].Visible = false;
15 if (this.Controls.Find("cbFilter" + i, true).Length > 0)
16 this.Controls.Find("cbFilter" + i, true)[0].Visible = false;
17                        }
18 else if (conditionselect.Text == "供应商名称")//在通用中需要修改或添加
19 {
20 if (this.Controls.Find("fplFilter" + i, true).Length > 0)
21 this.Controls.Find("fplFilter" + i, true)[0].Visible = false;
22 if (this.Controls.Find("txtFilter" + i, true).Length > 0)
23 this.Controls.Find("txtFilter" + i, true)[0].Visible = false;
24 if (this.Controls.Find("cbFilter" + i, true).Length > 0)
25 this.Controls.Find("cbFilter" + i, true)[0].Visible = true;
26                        }
27 else
28 {
29 if (this.Controls.Find("fplFilter" + i, true).Length > 0)
30 this.Controls.Find("fplFilter" + i, true)[0].Visible = false;
31 if (this.Controls.Find("txtFilter" + i, true).Length > 0)
32 this.Controls.Find("txtFilter" + i, true)[0].Visible = true;
33 if (this.Controls.Find("cbFilter" + i, true).Length > 0)
34 this.Controls.Find("cbFilter" + i, true)[0].Visible = false;
35
36                        }
37
38
39
40                    }
41                }
42            }
43 catch (Exception ex)
44 {
45                MessageBox.Show(ex.Message);
46            }
47        }

添加条件
提取sql语句

1
2 private void AddFilter()
3 {
4 try
5 {
6 for (int i = 0; i < this.fpl.Controls.Count; i++)
7 {
8 可替换代码#region 可替换代码
9 //if (((FlowLayoutPanel)this.fpl.Controls[i]).Visible == false)
10 //{
11 //    ((FlowLayoutPanel)this.fpl.Controls[i]).Visible = true;
12 //    break;
13 //}
14 #endregion
15
16 if (this.Controls.Find("fpl" + i, true).Length > 0)
17 {
18 if (this.Controls.Find("fpl" + i, true)[0].Visible == false)
19 {
20 this.Controls.Find("fpl" + i, true)[0].Visible = true;
21 break;
22                        }
23                    }
24
25                }
26            }
27 catch (Exception ex)
28 {
29                MessageBox.Show(ex.Message);
30            }
31        }

1 private string BuildSQL()
2 {
3 try
4 {
5
6                StringBuilder sb = new StringBuilder();
7 //需要的时候修改表明 得到通用
8                sb.Append("select * from InStoreBill_View ");
9 //用于判断是否是第一条数据 用于添加where的判断
10 int isFirst = 0;
11 for (int i = 0; i < this.fpl.Controls.Count; i++)
12 {
13 生成sql语句#region   生成sql语句
14 if (this.Controls.Find("fpl" + i, true)[0].Visible == true)
15 {
16
17 if (this.Controls.Find("cbSelect" + i, true)[0].Text != "所有")
18 {
19                            ComboBox selectCondition = (ComboBox)this.Controls.Find("cbSelect" + i, true)[0];
20
21 if (this.Controls.Find("txtFilter" + i, true)[0].Visible == true)
22 {//为本类型
23                                isFirst++;
24 if (isFirst == 1)//如果是第一次进入的话  isfirst应该为1
25 {
26                                    sb.Append("  where  ");
27                                }
28 else if (isFirst > 1)
29 {
30                                    sb.Append(" and ");
31                                }
32 else
33 { }
34
35                                sb.Append(string.Format(" {0} like '%{1}%' ", selectCondition.SelectedValue.ToString().Trim(), this.Controls.Find("txtFilter" + i.ToString(), true)[0].Text.Trim()));
36
37                            }
38 else if (this.Controls.Find("cbFilter" + i, true)[0].Visible == true)
39 {//下拉框类型
40                                isFirst++;
41 if (isFirst == 1)//如果是第一次进入的话  isfirst应该为1
42 {
43                                    sb.Append("  where  ");
44                                }
45 else if (isFirst > 1)
46 {
47                                    sb.Append(" and ");
48                                }
49 else
50 { }
51                                sb.Append(string.Format(" {0} like '%{1}%' ", selectCondition.SelectedValue.ToString().Trim(), this.Controls.Find("cbFilter" + i.ToString(), true)[0].Text.Trim()));
52
53
54                            }
55 else
56 {//时间类型
57                                isFirst++;
58 if (isFirst == 1)//如果是第一次进入的话  isfirst应该为1
59 {
60                                    sb.Append("  where  ");
61                                }
62 else if (isFirst > 1)
63 {
64                                    sb.Append(" and ");
65                                }
66 else
67 { }
68                                sb.Append(string.Format(" {0} between '{1}' and '{2}' ", selectCondition.SelectedValue.ToString().Trim(), ((DateTimePicker)this.Controls.Find("dtp" + i.ToString() + "Begin", true)[0]).Value.ToShortDateString(), ((DateTimePicker)this.Controls.Find("dtp" + i.ToString() + "End", true)[0]).Value.ToShortDateString()));
69
70                            }
71
72                        }
73                    }
74 #endregion
75                }
76 return sb.ToString();
77            }
78 catch (Exception ex)
79 {
80                MessageBox.Show(ex.Message);
81 return "";
82            }
83
84        }

注: 在设计过程中觉得最烦乱得是布局的设计 ,也许是不太熟练,浪费了很多的时间,好在通用或之际copy就ok了

     供下载的源文件链接  :   多条件动态查询通用模板下载

posted on 2010-08-27 15:30  风雨者2  阅读(3420)  评论(1编辑  收藏  举报

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