Question

我有一个名为CLB_CONTROLLER的checkedListBox，它被加载到页面以显示名称而不是ID：此信息存储在dbo.CHIPSET

中

public void loadCategory()
{
    CLB_CONTROLLER.DataSource = catg.getCategories();
    CLB_CONTROLLER.DisplayMember = "CHIPSET";
    CLB_CONTROLLER.ValueMember = "CHIPSET_ID";
}

然后我将数据作为字符串插入数据库。此信息存储在dbo.MYDB

中

//LOOP THROUGH CONTROLLER CHECKED ITEMS TO INSERT ALL SELECTED
string chip = "";
for (int i = 0; i < CLB_CONTROLLER.CheckedItems.Count; i++)
{
    if (chip == "")
    {
        chip = CLB_CONTROLLER.GetItemText(CLB_CONTROLLER.CheckedItems[i]);
    }
    else
    {
        chip += ", " + CLB_CONTROLLER.GetItemText(CLB_CONTROLLER.CheckedItems[i]);
    }
}

到目前为止一切都很好......现在我要创建更新功能...当用户从DataGrid中选择单元格时，我想在页面上自动填充所有textboxes，CheckBoxes等。所以我想弄清楚如何使用上面提到的CLB_CONTROLLER来做到这一点。更新正在查看dbo.MYDB和第2列CHIPSET，它现在是一个字符串（插入上面的代码）。我在下面有这个代码，但当我点击DataGrid时，CLB_CONTROLLER

内没有任何反应

//CHECK IF CONTROLLER CONTAINES CONTENT, THEN SELLECT APPROPRIATE CHECK BOX
string con = DGV_AOC.CurrentRow.Cells[2].Value.ToString();
string[] convalues = con.Split(',');
for (int i = 0; i < convalues.Length; i++)
{
    convalues[i] = convalues[i].Trim();
}

for (int i = 0; i < CLB_CONTROLLER.Items.Count; i++)
{
    CLB_CONTROLLER.SetItemChecked(i, false);//First uncheck the old value!
    for (int x = 0; x < convalues.Length; x++)
    {
        if (CLB_CONTROLLER.Items[i].ToString() == convalues[x].ToString())
        {
            //Check only if they match! 
            CLB_CONTROLLER.SetItemChecked(i, true);
        }
    }
}

非常感谢任何帮助。

Answer 1

Let's say you have filled the CheckedListBox with a,b,c,d,e,f for example as item texts.

Then you can set checked items based on a comma separated list this way:

var itemsToSelect = "a,c,d";
var items = itemsToSelect.Split(',');
for (var i = 0; i < checkedListBox1.Items.Count; i++)
{
    var b = items.Contains(checkedListBox1.GetItemText(checkedListBox1.Items[i]));
    checkedListBox1.SetItemChecked(i, b);
}

Also you can get checked items in a comma-separated string this way:

var selectedItems = string.Join(",",
    checkedListBox1.CheckedItems.Cast<object>()
        .Select(x => checkedListBox1.GetItemText(x)));

如何将选定项目返回到checkedListBox

1 个答案: