How Do I Select Index of combobox using Value Member

Question

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I populate combobox using dictionary. I use messagebox to show value of combobox everytime its index change. Example output is [100, Apple]
another [101, Banana]. What I want to accomplish is when I type 100 in textbox and click a button the combobox index will automatically select the index of [100, Apple] and if I type 101 then click the button again the index of [101, Banana] will be selected and so on. I tried to use combobox.findstring(string) but to no avail.
I'm hoping that someone who knows this will show me the right direction...

Thank you..

Posted 3-May-15 23:48pm

yhogz

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Comments

upendra shahi 4-May-15 5:59am

comboBox.SelectedIndex = comboBox.Items.IndexOf("your choice");

3 solutions

Solution 2

After databind you can find the value and set it.

C#

protected void dl_DataBound(object sender, EventArgs e) {
    dl.Items.FindByValue(val).Selected = true;
}

Posted 4-May-15 1:26am

Abhinav S

Solution 3

Combobox.SelectedValue = Textbox.text

Posted 4-May-15 17:19pm

yhogz

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psima · Accepted Answer · 2015-05-04T01:11:00

Please check the aspx page code as below =

C#

<div>
    <asp:textbox id="TextBox1" runat="server" xmlns:asp="#unknown"></asp:textbox>
    <asp:button id="Button1" runat="server" text="Button" onclick="Button1_Click" xmlns:asp="#unknown" />
    <asp:dropdownlist id="DropDownList1" runat="server" datasourceid="SqlDataSource1" datatextfield="Name" datavaluefield="Id" xmlns:asp="#unknown"></asp:dropdownlist>
    <asp:sqldatasource runat="server" id="SqlDataSource1" connectionstring="<%$ ConnectionStrings:LOC_MASTERConnectionString %>" selectcommand="SELECT [Id], [Name] FROM [Fruit]" xmlns:asp="#unknown">
    </asp:sqldatasource>
</div>

Please check the code behind =

C#

protected void Button1_Click(object sender, EventArgs e)
	{
		DropDownList1.SelectedValue = TextBox1.Text;
	}