技术资料 > .Net专区 > 数据库应用 : 关于datagrid的使用以及动态修改，以及使用存储过程的

关于datagrid的使用以及动态修改，以及使用存储过程的

March 25,2004

1.关于Datagrid,Datalist等数据绑定控件
由于vs.net是Codebehind的，而quickstart 上的例子是代码与页面混合的，所以许多朋友有些疑惑。特别是有关template中如何触发事件的问题。
是这样，许多server control都有一个commandname属性
就是在.aspx中设置你那个edit的commandname，在.cs中用e.CommandName 得到
如
///aspx页面
<asp:DataList id=usersList runat="server" ><template name="ItemTemplate">
<asp:ImageButton id=ImageButton1 runat="server" ImageUrl="../images/edit.gif" AlternateText="编辑条目" CommandName="edit"></asp:ImageButton>
<asp:ImageButton id=ImageButton2 runat="server" ImageUrl="../images/delete.gif" AlternateText="删除条目" CommandName="delete"></asp:ImageButton>
<asp:Label id=lblRole runat="server" Text="<%# Container.DataItem%>" CssClass="Normal"></asp:Label>
</template><template name="EditItemTemplate">
email (cookie auth) or DOMAINusername (Windows auth) 
<asp:Textbox id=userName width="200" cssclass="NormalTextBox" Text="<%# Container.DataItem %>" runat="server" />
<asp:LinkButton Text="Apply" CommandName="apply" cssclass="CommandButton" runat="server" ID=ApplyButton/>
</template></asp:DataList>///cs文件
protected void UsersList_ItemCommand (Object sender, DataListCommandEventArgs e)
 {
 if (e.CommandName == "edit") { // Set editable list item index if "edit" button clicked next to the item
 usersList.EditItemIndex = e.Item.ItemIndex; // Repopulate the datalist control
 BindData();
 }
 else if (e.CommandName == "apply") { // Obtain the current portal settings
 PortalConfigurationData portalConfig = PortalConfiguration.LoadSettings(PortalConfiguration.ConfigFilePath); // Update user entry
 portalConfig.SecurityRoles[roleIndex].Users[e.Item.ItemIndex] = ((TextBox) e.Item.FindControl("userName")).Text; // Persist Settings back to disk
 PortalConfiguration.PersistSettings(portalConfig); // Disable editable list item access
 usersList.EditItemIndex = -1; // Repopulate the datalist control
 BindData();
 }
 else if (e.CommandName == "delete") { // Obtain the current portal settings
 PortalConfigurationData portalConfig = PortalConfiguration.LoadSettings(PortalConfiguration.ConfigFilePath); // Delete selected User
 String[] users = new String[portalConfig.SecurityRoles][roleIndex].Users.Length-1]; for (int i=0, j=0; i < portalConfig.SecurityRoles[roleIndex].Users.Length; i++) { if (i != e.Item.ItemIndex) { users[j] = portalConfig.SecurityRoles[roleIndex].Users;
 j++;
 }
 } // Update Users
 portalConfig.SecurityRoles[roleIndex].Users = users; // Persist Settings back to disk
 PortalConfiguration.PersistSettings(portalConfig); // Ensure that item is not editable
 usersList.EditItemIndex = -1; // Repopulate list
 BindData();
 }
 }
2.关于在asp.net中调用存储过程
例子如下：
SQLConnection myConnection = new SQLConnection(PortalConfiguration.Settings.DatabaseConnectionString);
 SQLCommand myCommand = new SQLCommand("AddMessage", myConnection); // Mark the Command as a SPROC
 myCommand.CommandType = CommandType.StoredProcedure; // Add Parameters to SPROC
 SQLParameter parameterItemID = new SQLParameter("@ItemID", SQLDataType.Int, 4);
 parameterItemID.Direction = ParameterDirection.Output;
 myCommand.Parameters.Add(parameterItemID); SQLParameter parameterTitle = new SQLParameter("@Title", SQLDataType.NVarChar, 100);
 parameterTitle.Value = title;
 myCommand.Parameters.Add(parameterTitle); SQLParameter parameterBody = new SQLParameter("@Body", SQLDataType.NVarChar, 3000);
 parameterBody.Value = body;
 myCommand.Parameters.Add(parameterBody); SQLParameter parameterParentID = new SQLParameter("@ParentID", SQLDataType.Int, 4);
 parameterParentID.Value = parentId;
 myCommand.Parameters.Add(parameterParentID); SQLParameter parameterUserName = new SQLParameter("@UserName", SQLDataType.NVarChar, 100);
 parameterUserName.Value = userName;
 myCommand.Parameters.Add(parameterUserName); SQLParameter parameterPortalID = new SQLParameter("@PortalID", SQLDataType.Int, 4);
 parameterPortalID.Value = portalId;
 myCommand.Parameters.Add(parameterPortalID); SQLParameter parameterModuleID = new SQLParameter("@ModuleID", SQLDataType.Int, 4);
 parameterModuleID.Value = moduleId;
 myCommand.Parameters.Add(parameterModuleID);