如何从文本文件中获取值并选择具有该值的复选框？

Question

How I can get a value from a text file and select a checkbox who have that value ?

I tried with this code to get the value who is after equal:

string installerfilename = string.Format("{0}{1}", AppDomain.CurrentDomain.BaseDirectory, "installer.ini");
            IEnumerable<string> inilines = File.ReadAllLines(installerfilename).AsEnumerable();

            string selectedItem = checkedListBox1.SelectedItem.ToString();
            bool IsChecked = checkedListBox1.CheckedItems.Contains(selectedItem);
    inlines = inlines.Select(line => line == string.Format("‪product‬={0}", selectedItem))
                    ? Regex.Replace(line, string.Format("product={0}", selectedItem), string.Format(@"product={0}", selectedItem)) : line);

also I tried with this :

foreach (var line in inilines)
            {
                if (line.Contains("product={0}"))
                {
                    IsChecked = true;
                    //checkedListBox1.CheckedItems =true;
                }

but I don't know how to check the box from a CheckedListBox who have the value after equal for the rows how are like product="name of checkbox"

Answer 1

You can do it this way:

var lines = System.IO.File.ReadAllLines(@"D:\Test.txt");

lines.ToList()
     .ForEach(item =>
     {
         //check if item exists in CheckedListBox set it checked.
         //We find the index of the item, -1 means that item doesn't exists in CheckedListBox
         var index = this.checkedListBox1.Items.IndexOf(item);
         if(index >=0)
             this.checkedListBox1.SetItemChecked(index, true);
     });

Note:

• Instead of using a file for saving and restoring your checked items, It's better to use a settings property to save your checked items.

Check all Items:

To check an item by its index, yo ucan use this.checkedListBox1.SetItemChecked(i, true); , so for checking all items, you can do:

for (int i = 0; i < this.checkedListBox1.Items.Count; i++)
{
    this.checkedListBox1.SetItemChecked(i, true);
}

For your specific case:

you have a file containing:

product=item1
#product=item2
#product=item3
product=item4

That means item1 and item4 should be checked, you can use Where and Select to select what you need from lines, for example:

lines.Where(x=>!x.StartsWith("#"))
     .Select(x=>x.Replace("Product=","").Trim())
     .ToList()
     .ForEach(item =>
     {
         var index = this.checkedListBox1.Items.IndexOf(item);
         if(index >=0)
             this.checkedListBox1.SetItemChecked(index, true);
     });