我已经填充了我的组合框与从数据库填充的数据表。然后我设置了DisplayMember和ValueMember。我使用这段代码来设置所选项目。

foreach (DataRowView Row in ComboBox1.Items)
{
    if (Row["ColumnName"].ToString() == "Value") ComboBox1.SelectedItem = Row;
}

  ListItem li = DropDownList.Items.FindByValue("13001");
  DropDownList.SelectedIndex = ddlCostCenter.Items.IndexOf(li);

你的案子可以用

DropDownList.Items.FindByText("Text");

comboBox1.SelectedItem.Text = "test1";

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!

如果组合框中的项目是字符串，您可以尝试:

comboBox1.SelectedItem = "test1";

_cmbTemplates.SelectedText = "test1"

或者

_cmbTemplates.SelectedItem= _cmbTemplates.Items.Equals("test1");