vb.net ComboBox 重置为在windows应用程序中选择ComboBox的文本
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ComboBox Reset to Select the Text of the ComboBox in windows Application
提问by Babu Kumarasamy
I had added the items 1 2 3 to the combobox.
我已将项目 1 2 3 添加到组合框。
Then I gave the "Select" to the text of the combobox.
然后我给了组合框的文本“选择”。
How can I able to reset combobox to select the text("Select").
如何重置组合框以选择文本（“选择”）。
I had tried by giving -1 to the SelectedIndex. But it gives only Empty.
我曾尝试给 SelectedIndex 提供 -1。但它只给空。
This is for VB.NET Windows Application
这是用于 VB.NET Windows 应用程序
I have given an Image for your reference
我给了一张图片供您参考
Image path for the reference http://www.drivehq.com/file/df.aspx/publish/rk.babu/Files/ComboBoxReset.jpg
参考图片路径 http://www.drivehq.com/file/df.aspx/publish/rk.babu/Files/ComboBoxReset.jpg
回答by Hank
If the ComboBox1 property 'DropDownStyle' is set to 'Simple' or 'DropDown' then
如果 ComboBox1 属性 'DropDownStyle' 设置为 'Simple' 或 'DropDown' 那么
Private Sub ComboBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
If ComboBox1.SelectedIndex = -1 Then ComboBox1.Text = "Select"
End Sub
will work. If set to 'DropDownList' then not...
将工作。如果设置为“DropDownList”，则不...
回答by adatapost
Set 0 value to SelectedIndex property. It will select 1st list item.
将 0 值设置为 SelectedIndex 属性。它将选择第一个列表项。
private Sub button1_Click(sender as object,e as EventArgs) Handles button1.Click
comboBox1.SelectedIndex = 0
End Sub
回答by Hand-E-Food
Just set the text property:
只需设置文本属性：
Private Sub ComboBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
If ComboBox1.SelectedIndex = -1 Then ComboBox1.Text = "Select"
End Sub
回答by jane
combobox1.Text = "Select"
combobox1.Text = "选择"
and change the attribute of the combobox dropdownstyle to dropdown
并将组合框下拉样式的属性更改为下拉
回答by Perroni
for combobox1 dropdown list i use
对于我使用的 combobox1 下拉列表
combobox1.ResetText()
combobox1.SelectedIndex = -1
works here .
在这里工作。
回答by Srinu Rama Krishnan
double click the clear button in the design screen and type the following code to clear the value that is selected in the combo box.
双击设计屏幕中的清除按钮并键入以下代码以清除在组合框中选择的值。
private void button2_Click(object sender, EventArgs e)
{
c1.SelectedIndex = -1;
}
