请试试这个方法，它对我很有效:

Combobox1.items[Combobox1.selectedIndex] = "replaced text";

ComboBox1.SelectedIndex= ComboBox1.FindString("Matching String");

在windows窗体中尝试此操作。

这个方案是基于MSDN的，我做了一些修改。

It finds exact or PART of string and sets it. private int lastMatch = 0; private void textBoxSearch_TextChanged(object sender, EventArgs e) { // Set our intial index variable to -1. int x = 0; string match = textBoxSearch.Text; // If the search string is empty set to begining of textBox if (textBoxSearch.Text.Length != 0) { bool found = true; while (found) { if (comboBoxSelect.Items.Count == x) { comboBoxSelect.SelectedIndex = lastMatch; found = false; } else { comboBoxSelect.SelectedIndex = x; match = comboBoxSelect.SelectedValue.ToString(); if (match.Contains(textBoxSearch.Text)) { lastMatch = x; found = false; } x++; } } } else comboBoxSelect.SelectedIndex = 0; }

希望我能帮上忙!

combo.Items.FindByValue("1").Selected = true;

如果组合框中的项目是字符串，您可以尝试:

comboBox1.SelectedItem = "test1";

你可以说comboBox1。[0].ToString();