如何在清单框内增加价值

本文介绍了如何在清单框内增加价值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试在combobox_SelectedIndexChanged事件中从数据库的清单框添加值.

为此，我使用了这些代码

Hi,
i am trying to add value in checklistbox from database on combobox_SelectedIndexChanged event.

for that i used these code

Dim a, b As Integer
       Dim h As String
       h = Convert.ToString(comboBox3.Text)
       commObj = New OleDbCommand("SELECT Test FROM SubTest WHERE MainTest = '" & h & "' ", cnn)
       myAdapter = New OleDbDataAdapter(commObj)
       myAdapter.Fill(myDataSet1, "cDetails")
       For Each ds As DataRow In myDataSet1.Tables("cDetails").Rows




           CheckedListBox1.Items.Add(ds("SubTest").ToString())
       Next

但是主要的问题是，当我在清单列表中的那个时间在清单框中得到输出时，我们得到了8个空白项目(空白)，后来数据库选择的项目开始了

我的问题是为什么那里有这8个空间.
我正在尝试许多可能性，但无法获得解决方案:-(
尝试解决这些问题.

but main issue is that when i got output in checklistbox that time at list starting we get 8 blank item( blank space ) and later database selected item start

my question is why these 8 space are present there.
i am trying so many possibility but cant get solution :-(
try to help for these problem.

推荐答案

CheckedListBox1.DataValueField = "Test";
CheckedListBox1.DataTextField = "Test";
CheckedListBox1.DataSource = myDataSet1;
CheckedListBox1.DataBind();

不需要像任何将项目附加到复选框列表的循环

no need to do like any loop for attaching items to checkbox list

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