TreeView绑定数据库中的数据实例

今天很郁闷。想了很久才完成TreeView绑定数据库中数据的功能，但感觉方法很弱，效率很低。要多次进行数据库的读取。
下面简单介绍一下，希望知道简单方法的朋友能给我点启发。
效果如图：





其中节点的数据军事数据库中的。
下面是代码：（很多循环）


private void InitTheTree()


{


string m_NodeName;//根节点名称


TestManagerRules tempRules = new TestManagerRules();


ProjectData.TestManager_SelectProjectListDataTable tempTable = new ProjectData.TestManager_SelectProjectListDataTable();


tempTable = tempRules.SelectProjectList();


for (int i = 0; i < tempTable.Count; i++)


{


//控制字的长度


string tempString = Convert.ToString(tempTable[i].ProjectName);


if (tempString.Length > 15)


{


tempString = tempString.Substring(0, 15) + "

";


m_NodeName = tempString;


}


else


{


m_NodeName = tempTable[i].ProjectName.ToString();


}


TreeNode newNode = new TreeNode(m_NodeName, tempTable[i].ProjectID.ToString());


newNode.NavigateUrl = tempRules.GetModulePage(m_ModuleID, ModulePageENUM.ProjectManagement) + "?id=" + newNode.Value;


newNode.Expanded = false;


this.CategoryTree.Nodes.Add(newNode);


//绑定根节点


}








for (int a = 0; a < CategoryTree.Nodes.Count; a++)


{


TreeNode ModuleNode = new TreeNode("模块", tempTable[a].ProjectID.ToString());


ModuleNode.NavigateUrl = tempRules.GetModulePage(m_ModuleID, ModulePageENUM.ModuleAddandEdit) + "?id=" + ModuleNode.Value;


TreeNode TestCombinationNode = new TreeNode("测试", tempTable[a].ProjectID.ToString());


TestCombinationNode.NavigateUrl = tempRules.GetModulePage(m_ModuleID, ModulePageENUM.TestCombinationList) + "?id=" + TestCombinationNode.Value;


this.CategoryTree.Nodes[a].ChildNodes.Add(ModuleNode);


this.CategoryTree.Nodes[a].ChildNodes.Add(TestCombinationNode);




string m_ModuleName;


ProjectData.TestManager_GetModuleInfoByProjectIDDataTable table = new ProjectData.TestManager_GetModuleInfoByProjectIDDataTable();


table = tempRules.GetModuleInfoByProjectID(Convert.ToInt32(tempTable[a].ProjectID.ToString()));


if (table.Count > 0)


{


for (int x = 0; x < table.Count; x++)


{


string tempmodule = table[x].ModuleName.ToString();


//控制数据的长度


if (tempmodule.Length > 15)


{


m_ModuleName = tempmodule.Substring(0, 15)+"

";


}


else


{


m_ModuleName = table[x].ModuleName.ToString();


}


TreeNode newchildNode = new TreeNode(m_ModuleName, table[x].MID.ToString());


ModuleData.TestManager_GetProjectIDByModuleIDDataTable projecttable;


TestManagerRules rule = new TestManagerRules();


projecttable = rule.GetProjectIDByMID(Convert.ToInt32(newchildNode.Value));


newchildNode.NavigateUrl = tempRules.GetModulePage(m_ModuleID, ModulePageENUM.TestDemandList) + "?id=" + newchildNode.Value + "&pid=" + projecttable[0].ProjectID.ToString();


newchildNode.Expanded = false;


this.CategoryTree.Nodes[a].ChildNodes[0].ChildNodes.Add(newchildNode);


}


}


}


//循环绑定测试组合数据


for (int b = 0; b < CategoryTree.Nodes.Count; b++)


{


string m_TestCombinationName;


ProjectData.TestManager_GetTestCombinationInfoByProjectIDDataTable tables = new ProjectData.TestManager_GetTestCombinationInfoByProjectIDDataTable();


tables = tempRules.GetTestCombinationInfoByProjectID(Convert.ToInt32(tempTable[b].ProjectID.ToString()));


ProjectData.TestManager_GetProjectIDByTestIDDataTable projecttable;


for (int y = 0; y < tables.Count; y++)


{


string tempcombination = tables[y].TestName.ToString();


//控制数据的长度


if (tempcombination.Length > 15)


{


m_TestCombinationName = tempcombination.Substring(0, 15) + "

";


}


else


{


m_TestCombinationName = tables[y].TestName.ToString();


}


TreeNode newchildNode1 = new TreeNode(m_TestCombinationName, tables[y].TestID.ToString());


projecttable = tempRules.GetProjectIDByTestID(Convert.ToInt32(newchildNode1.Value));


pid = projecttable[0].ProjectID;


newchildNode1.NavigateUrl = tempRules.GetModulePage(m_ModuleID, ModulePageENUM.TestCombinationDetail) + "?id=" + pid.ToString() + "&testid=" + newchildNode1.Value;


newchildNode1.Expanded = false;


this.CategoryTree.Nodes[b].ChildNodes[1].ChildNodes.Add(newchildNode1);


}


}


}
很麻烦吧，惭愧，呵呵！希望大家都帮忙！