_cmbTemplates.SelectedText = "test1"

或者

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

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

你的案子可以用

DropDownList.Items.FindByText("Text");

对我来说，这只管用:

foreach (ComboBoxItem cbi in someComboBox.Items)
{
    if (cbi.Content as String == "sometextIntheComboBox")
    {
        someComboBox.SelectedItem = cbi;
        break;
    }
}

MOD:如果你有你自己的对象作为项目设置在组合框，然后替换ComboBoxItem与他们中的一个:

foreach (Debitor d in debitorCombo.Items)
{
    if (d.Name == "Chuck Norris")
    {
        debitorCombo.SelectedItem = d;
        break;
    }
}

SelectedText用于在字符串编辑器中获取或设置组合框中所选项目的实际文本。如果你设置了:

comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;

Use:

comboBox1.SelectedItem = "test1";

or:

comboBox1.SelectedIndex = comboBox1.Items.IndexOf("test1");

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

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!