组合框中的selectedIndex [英] selectedindex in combobox

问题描述

组合框已填充，但所选索引似乎不起作用，
因为组合框不会显示<-选择状态->"正在显示.
你知道为什么吗?
谢谢

Hi,
The combo box is populated but it seems that the selected index does not work,
because the combo box does not show "<-- Select a Status -->" in display.
Do you know why please?
Thanks

private void PopulateTaskStatus()
        {
            DataTable dtTaskStatus = TaskStatusGet();

            DataRow newRow = dtTaskStatus.NewRow();

            dtTaskStatus.Columns["Status"].MaxLength = 50;
            newRow["Status"] = "<-- Select a Status -->";

            dtTaskStatus.Rows.InsertAt(newRow, 0);

            cboStatus.DataSource = null;

            cboStatus.Items.Clear();
            cboStatus.DisplayMember = "Status";
            cboStatus.DataSource = dtTaskStatus;

            cboStatus.SelectedIndex = 0;
        }

推荐答案

你好，

您可以尝试按文本查找并按值查找

cboStatus.Items.FindByText("Status").Selected = true;或
cboStatus.Items.FindByValue("Status").Selected = true;

Hello,

you can try this find by text and find by value

cboStatus.Items.FindByText("Status").Selected = true; OR
cboStatus.Items.FindByValue("Status").Selected = true;

可以在示例代码中看到我做错了什么吗?
这对于我用过的其他形式也很好用.
谢谢

Can you see what I am doing wrong in my sample code?
This works fine for other forms I use it in.
Thanks

是的，我可以在组合框中看到所有项目.
第一项是<-选择一个项目->

如您在我之前发送的代码中所见，我看不到为什么cboStatus.SelectedIndex = 0;不会在组合框中将该项目显示为选定的项目.
你知道为什么吗?
此方法以其他形式与其他表数据一起使用.
谢谢

yes, I can see all items in the combo box.
The first item is <-- select an item -->

As you can see in th ecode I sent earlier, I do not see why cboStatus.SelectedIndex = 0; does not show this item as the selected item in combobox.
Do you see why?
This method works in other forms with other table data.
Thanks

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