一、界面：
二、数据库访问类：
1 public class DataClass
2 {
3 private readonly string connect = ConfigurationManager.AppSettings["connectString"];
4 public DataClass() { }
5
6 /// <summary>
7 /// 执行查询语句，返回DataSet
8 /// </summary>
9 /// <param name="SQLString">查询语句</param>
10 /// <returns>DataSet</returns>
11 public DataSet Query(string SQLString)
12 {
13
14 using (MySqlConnection connection = new MySqlConnection(connect))
15 {
16 DataSet ds = new DataSet();
17 try
18 {
19 connection.Open();
20 MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);
21 command.Fill(ds, "ds");
22 }
23 catch (MySqlException ex)
24 {
25 throw new Exception(ex.Message);
26 }
27
28 return ds;
29 }
30 }
31
32 /// <summary>
33 /// 执行查询语句，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
34 /// </summary>
35 /// <param name="strSQL">查询语句</param>
36 /// <returns>SqlDataReader</returns>
37 public MySqlDataReader ExecuteReader(string strSQL)
38 {
39 using (MySqlConnection connection = new MySqlConnection(connect))
40 {
41 MySqlCommand cmd = new MySqlCommand(strSQL, connection);
42 try
43 {
44 connection.Open();
45 MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
46 return myReader;
47 }
48 catch (System.Data.SqlClient.SqlException e)
49 {
50 throw e;
51 }
52 }
53 }
54
55 /// <summary>
56 /// 执行一条计算查询结果语句，返回查询结果（object）。
57 /// </summary>
58 /// <param name="SQLString">计算查询结果语句</param>
59 /// <returns>查询结果（object）</returns>
60 public object GetSingle(string SQLString)
61 {
62 using (MySqlConnection connection = new MySqlConnection(connect))
63 {
64 using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
65 {
66 try
67 {
68 connection.Open();
69 object obj = cmd.ExecuteScalar();
70 if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
71 {
72 return null;
73 }
74 else
75 {
76 return obj;
77 }
78 }
79 catch (System.Data.SqlClient.SqlException e)
80 {
81 connection.Close();
82 throw e;
83 }
84 }
85 }
86 }
87
88 public bool Exists(string strSql)
89 {
90 object obj = GetSingle(strSql);
91 int cmdresult;
92 if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
93 {
94 cmdresult = 0;
95 }
96 else
97 {
98 cmdresult = int.Parse(obj.ToString());
99 }
100 if (cmdresult == 0)
101 {
102 return false;
103 }
104 else
105 {
106 return true;
107 }
108 }
109
110 /// <summary>
111 /// 执行SQL语句，返回影响的记录数
112 /// </summary>
113 /// <param name="SQLString">SQL语句</param>
114 /// <returns>影响的记录数</returns>
115 public int ExecuteSql(string SQLString)
116 {
117 using (MySqlConnection connection = new MySqlConnection(connect))
118 {
119 using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
120 {
121 try
122 {
123 connection.Open();
124 int rows = cmd.ExecuteNonQuery();
125 return rows;
126 }
127 catch (System.Data.SqlClient.SqlException e)
128 {
129 connection.Close();
130 throw e;
131 }
132 }
133 }
134 }
135
136 /// <summary>
137 /// 得到一个对象实体
138 /// </summary>
139 public ModelClass GetModelList(int MenuId)
140 {
141
142 StringBuilder strSql = new StringBuilder();
143 strSql.Append("select MenuId,MenuName,MenuRemark,MenuUrl,ParentMenuId,MenuIcon,MenuSort FROM SYS_Menu ");
144 strSql.Append(" where MenuId= " + MenuId);
145
146 ModelClass model = new ModelClass();
147 DataSet ds = Query(strSql.ToString());
148 if (ds.Tables[0].Rows.Count > 0)
149 {
150 if (ds.Tables[0].Rows[0]["MenuId"].ToString() != "")
151 {
152 model.MenuId = int.Parse(ds.Tables[0].Rows[0]["MenuId"].ToString());
153 }
154 model.MenuName = ds.Tables[0].Rows[0]["MenuName"].ToString();
155 model.MenuRemark = ds.Tables[0].Rows[0]["MenuRemark"].ToString();
156 model.MenuUrl = ds.Tables[0].Rows[0]["MenuUrl"].ToString();
157 if (ds.Tables[0].Rows[0]["ParentMenuId"].ToString() != "")
158 {
159 model.ParentMenuId = int.Parse(ds.Tables[0].Rows[0]["ParentMenuId"].ToString());
160 }
161 model.MenuIcon = ds.Tables[0].Rows[0]["MenuIcon"].ToString();
162 if (ds.Tables[0].Rows[0]["MenuSort"].ToString() != "")
163 {
164 model.MenuSort = int.Parse(ds.Tables[0].Rows[0]["MenuSort"].ToString());
165 }
166 return model;
167 }
168 else
169 {
170 return null;
171 }
172 }
173
174 /// <summary>
175 /// 增加一条数据
176 /// </summary>
177 public int Add(ModelClass model)
178 {
179 StringBuilder strSql = new StringBuilder();
180 strSql.Append("insert into SYS_Menu(");
181 strSql.Append("MenuName,MenuRemark,MenuUrl,ParentMenuId,MenuIcon,MenuSort)");
182 strSql.Append(" values (");
183 strSql.Append("‘" + model.MenuName + "‘," );
184 strSql.Append("‘" + model.MenuRemark + "‘,");
185 strSql.Append("‘" + model.MenuUrl + "‘,");
186 strSql.Append("‘" + model.ParentMenuId + "‘,");
187 strSql.Append("‘" + model.MenuIcon + "‘,");
188 strSql.Append("‘" + model.MenuSort + "‘)");
189 object obj = ExecuteSql(strSql.ToString());
190 if (obj == null)
191 {
192 return -1;
193 }
194 else
195 {
196 return Convert.ToInt32(obj);
197 }
198 }
199
200 /// <summary>
201 /// 删除一条数据
202 /// </summary>
203 public void Delete(int MenuId)
204 {
205 string sql = "delete from SYS_Menu where MenuId = " + MenuId;
206 ExecuteSql(sql);
207 }
208
209 /// <summary>
210 /// 更新一条数据
211 /// </summary>
212 public void Update(ModelClass model)
213 {
214 StringBuilder strSql = new StringBuilder();
215 strSql.Append("update SYS_Menu set ");
216 strSql.Append("MenuName=‘" + model.MenuName + "‘,");
217 strSql.Append("MenuRemark=‘" + model.MenuRemark + "‘,");
218 strSql.Append("MenuUrl=‘" + model.MenuUrl + "‘,");
219 strSql.Append("ParentMenuId=‘" + model.ParentMenuId + "‘,");
220 strSql.Append("MenuIcon=‘" + model.MenuIcon + "‘,");
221 strSql.Append("MenuSort=‘" + model.MenuSort + "‘");
222 strSql.Append(" where MenuId=" + model.MenuId);
223
224 ExecuteSql(strSql.ToString());
225 }
226 }
三、窗体页面代码：
1 public partial class MenuManager : Form
2 {
3 DataClass help = new DataClass();
4 ModelClass model = new ModelClass();
5 public MenuManager()
6 {
7 InitializeComponent();
8 }
9
10 /// <summary>
11 /// 窗体载入事件
12 /// </summary>
13 /// <param name="sender"></param>
14 /// <param name="e"></param>
15 private void MenuManager_Load(object sender, EventArgs e)
16 {
17 QueryTreeView();//树型菜单
18 ComBoxBindInit(); //上级菜单下拉列表初始化
19 }
20
21 /// <summary>
22 /// 树型菜单查看事件
23 /// </summary>
24 /// <param name="sender"></param>
25 /// <param name="e"></param>
26 private void bntQuery_Click(object sender, EventArgs e)
27 {
28 QueryTreeView();//树型菜单
29 }
30
31 /// <summary>
32 /// 树型菜单展示
33 /// </summary>
34 private void QueryTreeView()
35 {
36 BindListView(treeViewMenu);
37 //展开所有节点
38 treeViewMenu.ExpandAll();
39 this.treeViewMenu.Nodes[0].EnsureVisible();//滚动打显示最上方
40 }
41
42 #region 网站树形菜单
43 public void BindListView(TreeView treeView)
44 {
45 //清空树的所有节点
46 treeView.Nodes.Clear();
47 //创建根节点
48 TreeNode rootNode = new TreeNode();
49 rootNode.Text = "菜单列表";
50 rootNode.Name = "0";
51
52 //展开所有节点
53 //添加根节点
54 treeView.Nodes.Add(rootNode);
55 // 获取所有节点信息
56 DataTable dt = help.Query(" select MenuId,MenuName,MenuRemark,MenuUrl,ParentMenuId,MenuIcon,MenuSort FROM SYS_Menu Where 1=1 order by ParentMenuId , MenuSort asc ").Tables[0];
57 ////创建其他节点
58 CreateChildNode(rootNode, dt);
59 }
60
61 private void CreateChildNode(TreeNode parentNode, DataTable dataTable)
62 {
63 DataRow[] rowList = dataTable.Select("ParentMenuId=‘" + parentNode.Name + "‘");
64 foreach (DataRow row in rowList)
65 { //创建新节点
66 TreeNode node = new TreeNode();
67 //设置节点的属性
68 node.Text = row["MenuName"].ToString();
69 node.Name = row["MenuId"].ToString();
70 parentNode.Nodes.Add(node);
71 //递归调用，创建其他节点
72 CreateChildNode(node, dataTable);
73 }
74 }
75 #endregion
76
77 /// <summary>
78 /// 上级菜单初始化
79 /// </summary>
80 private void ComBoxBindInit()
81 {
82 DataTable dt = help.Query("select MenuId,MenuName,MenuRemark,MenuUrl,ParentMenuId,MenuIcon,MenuSort FROM SYS_Menu ").Tables[0];
83
84 DataRow dr = dt.NewRow();
85 dr["MenuName"] = "=============顶级菜单=============";
86 dr["MenuId"] = 0;
87 dt.Rows.InsertAt(dr, 0);
88
89 comParentMenuId.DataSource = dt;
90 comParentMenuId.DisplayMember = "MenuName";
91 comParentMenuId.ValueMember = "MenuId";
92
93 }
94
95 /// <summary>
96 /// 上级菜单重置（即查询所有菜单）
97 /// </summary>
98 /// <param name="sender"></param>
99 /// <param name="e"></param>
100 private void bntInit_Click(object sender, EventArgs e)
101 {
102 txtQueryMenu.Text = "";
103 ComBoxBindInit();
104 }
105
106 /// <summary>
107 /// 模糊查询菜单信息绑定上级菜单下拉列表
108 /// </summary>
109 /// <param name="sender"></param>
110 /// <param name="e"></param>
111 private void bntSelect_Click(object sender, EventArgs e)
112 {
113 DataTable dt = help.Query("select MenuId,MenuName,MenuRemark,MenuUrl,ParentMenuId,MenuIcon,MenuSort FROM SYS_Menu where 1=1 and MenuName like ‘%" + txtQueryMenu.Text.Trim() + "%‘ ").Tables[0];
114
115 DataRow dr = dt.NewRow();
116 dr["MenuName"] = "===无===";
117 dr["MenuId"] = 0;
118 dt.Rows.InsertAt(dr, 0);
119
120 comParentMenuId.DataSource = dt;
121 comParentMenuId.DisplayMember = "MenuName";
122 comParentMenuId.ValueMember = "MenuId";
123 }
124
125 /// <summary>
126 /// 选择节点取值
127 /// </summary>
128 /// <param name="sender"></param>
129 /// <param name="e"></param>
130 private void treeViewMenu_AfterSelect(object sender, TreeViewEventArgs e)
131 {
132 try
133 {
134 if (e.Node.Text != "菜单列表")
135 {
136 ComBoxBindInit();
137 model = help.GetModelList(Convert.ToInt32(e.Node.Name));
138 txtMenuId.Text = model.MenuId.ToString();
139 txtMenuName.Text = model.MenuName;
140 txtMenuUrl.Text = model.MenuUrl;
141 txtMenuSort.Text = model.MenuSort.ToString();
142 txtMenuIcon.Text = model.MenuIcon;
143 txtMenuRemark.Text = model.MenuRemark;
144 comParentMenuId.SelectedValue = model.ParentMenuId;
145 }
146 else
147 {
148 ClearText();
149 }
150 }
151 catch (Exception ex)
152 {
153 MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
154 }
155 }
156
157 /// <summary>
158 /// 清空文本内容
159 /// </summary>
160 private void ClearText()
161 {
162 txtMenuId.Text = "";
163 txtMenuName.Text = "";
164 txtMenuUrl.Text = "";
165 txtMenuSort.Text = "";
166 txtMenuIcon.Text = "";
167 txtMenuRemark.Text = "";
168 }
169
170 /// <summary>
171 /// 添加
172 /// </summary>
173 /// <param name="sender"></param>
174 /// <param name="e"></param>
175 private void bntAdd_Click(object sender, EventArgs e)
176 {
177 try
178 {
179 getModel();//为实体类赋值
180
181 #region 条件满足判断
182 //菜单名称不能为空
183 if (txtMenuName.Text == "")
184 {
185 MessageBox.Show("菜单名称不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
186 return;
187 }
188 //同级菜单中不能有相同菜单名称
189 if(help.Exists("select count(1) from SYS_Menu where MenuName=‘" + txtMenuName.Text + "‘ and ParentMenuId=" + Convert.ToInt32(comParentMenuId.SelectedValue.ToString())))
190 {
191 MessageBox.Show("同级菜单中该名称已存在", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
192 return;
193 }
194 //验证该级菜单是否有相同排序号
195 if (help.Exists("select count(1) from SYS_Menu where MenuSort=" + Convert.ToInt32(txtMenuSort.Text.Trim()) + " and ParentMenuId=" + Convert.ToInt32(comParentMenuId.SelectedValue.ToString())))
196 {
197 MessageBox.Show("该级菜单存在相同排序号！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
198 return;
199 }
200 //排序号必填
201 if (txtMenuSort.Text == "")
202 {
203 MessageBox.Show("排序号不能为空！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
204 return;
205 }
206 #endregion
207
208 int result = help.Add(model);//添加
209 if (result >= 0)
210 {
211 MessageBox.Show("添加成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
212 ClearText();
213 }
214 }
215 catch (Exception ex)
216 {
217 MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
218 }
219 }
220
221 /// <summary>
222 /// 修改
223 /// </summary>
224 /// <param name="sender"></param>
225 /// <param name="e"></param>
226 private void bntUpdate_Click(object sender, EventArgs e)
227 {
228 try
229 {
230 getModel();//为实体类赋值
231
232 #region 条件满足判断
233 //菜单名称不能为空
234 if (txtMenuName.Text == "")
235 {
236 MessageBox.Show("菜单名称不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
237 return;
238 }
239 //同级菜单中不能有相同菜单名称
240 if (help.Exists("select count(1) from SYS_Menu where MenuId <>" + model.MenuId + " and MenuName=‘" + txtMenuName.Text + "‘ and ParentMenuId=" + Convert.ToInt32(comParentMenuId.SelectedValue.ToString())))
241 {
242 MessageBox.Show("同级菜单中该名称已存在", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
243 return;
244 }
245 //验证该级菜单是否有相同排序号
246 if (help.Exists("select count(1) from SYS_Menu where MenuId<>" + model.MenuId + " and MenuSort=" + Convert.ToInt32(txtMenuSort.Text.Trim()) + " and ParentMenuId=" + Convert.ToInt32(comParentMenuId.SelectedValue.ToString())))
247 {
248 MessageBox.Show("该级菜单存在相同排序号！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
249 return;
250 }
251 //排序号必填
252 if (txtMenuSort.Text == "")
253 {
254 MessageBox.Show("排序号不能为空！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
255 return;
256 }
257 #endregion
258 if (txtMenuId.Text != "" && help.Exists("select count(1) from SYS_Menu where MenuId=" + model.MenuId))
259 {
260 help.Update(model);
261 MessageBox.Show("更新成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
262 }
263 else
264 {
265 MessageBox.Show("数据记录不存在！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
266 }
267
268 }
269 catch (Exception ex)
270 {
271 MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
272 }
273 }
274
275 /// <summary>
276 /// 删除
277 /// </summary>
278 /// <param name="sender"></param>
279 /// <param name="e"></param>
280 private void bntDelete_Click(object sender, EventArgs e)
281 {
282 try
283 {
284 if (txtMenuId.Text == "")
285 {
286 MessageBox.Show("请选择所要删除的记录", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
287 return;
288 }
289 //删除前先判断是否被其他菜单引用
290 if (help.Exists("select count(1) from SYS_Menu where ParentMenuId=" + Convert.ToInt32(txtMenuId.Text)))
291 {
292 MessageBox.Show("该菜单被子级菜单引用，请先删除引用！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
293 return;
294 }
295 if (MessageBox.Show("确定要删除该记录吗？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information) == DialogResult.Yes)
296 {
297 help.Delete(Convert.ToInt32(txtMenuId.Text));
298 MessageBox.Show("删除成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
299 ClearText();
300 }
301 }
302 catch (Exception ex)
303 {
304 MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
305 }
306 }
307
308 /// <summary>
309 /// 清空
310 /// </summary>
311 /// <param name="sender"></param>
312 /// <param name="e"></param>
313 private void bntClear_Click(object sender, EventArgs e)
314 {
315 ClearText();
316 }
317
318 /// <summary>
319 /// 排序号只能输入数字类型
320 /// </summary>
321 /// <param name="sender"></param>
322 /// <param name="e"></param>
323 private void txtMenuSort_KeyPress(object sender, KeyPressEventArgs e)
324 {
325 if (e.KeyChar != 8 && !Char.IsDigit(e.KeyChar))
326 {
327 e.Handled = true;
328 }
329 }
330
331 /// <summary>
332 /// 为实体类赋值
333 /// </summary>
334 private void getModel()
335 {
336 if (txtMenuId.Text != "")
337 model.MenuId = Convert.ToInt32(txtMenuId.Text);
338 model.MenuName = txtMenuName.Text.Trim();
339 model.MenuUrl = txtMenuUrl.Text.Trim();
340 if (txtMenuSort.Text != "")
341 model.MenuSort = Convert.ToInt32(txtMenuSort.Text.Trim());
342 model.MenuIcon = txtMenuIcon.Text.Trim();
343 model.MenuRemark = txtMenuRemark.Text;
344 model.ParentMenuId = Convert.ToInt32(comParentMenuId.SelectedValue.ToString());
345 }
346
347 /// <summary>
348 /// 光标处于上级菜单查询按下回车执行查询事件
349 /// </summary>
350 /// <param name="sender"></param>
351 /// <param name="e"></param>
352 private void txtQueryMenu_KeyPress(object sender, KeyPressEventArgs e)
353 {
354 if (e.KeyChar == 13)
355 {
356 bntSelect_Click(sender, e);
357 }
358 }
359
360
361 }
时间： 2024-11-04 03:28:11