Question

尝试使用文本框在我的Datagrid中查找特定日期时尝试获取此问题的帮助。日期目前的字符串格式为dd / MM / yyyy。在日期列中。我之前发过但没有得到有用的答案，我的问题被埋没了。似乎没有人能回答他们只是避开这个话题。目前我不能将日期作为DateTime，因为应用程序的其余部分已格式化。

由于

编辑代码：

public class ImagesInfo
{
    public string FileName { get; set; } //For Picture File Name
    public string Description { get; set; } //For the Description of the Picture
    public string Category { get; set; } //Category of Picture
    public  string Date { get; set; }//Date Taken of the Picture, format discussed in report.
    public string Comments { get; set; } //Comments for the picture     
}

在数据网格中查找类别时使用的代码。

if (categoryFilterBox.Text == string.Empty)
{
    //used if nothing is in the filter box to avoid blanking
    var source = new BindingSource();
    source.DataSource = images;

    navigationGrid.DataSource = source;
}
else
{
    //making a new filtered list that includes the matching Categorys and binding it.
    string catFilter;
    try
    {
        catFilter = categoryFilterBox.Text;
        var filteredList = images.Where(item => item.Category == catFilter);
        var filterSource = new BindingSource();
        filterSource.DataSource = filteredList;
        navigationGrid.DataSource = filterSource;
    }
    catch (FormatException)
    {
        MessageBox.Show("Must be Words of Letters");
    }
}

将记录添加到我的列表中的示例，该列表是数据网格的源。

private void addRecord()
{
    var newImage = new ImagesInfo();//new instance

    newImage.FileName = fileNameTextBox.Text;
    newImage.Category = categoryComboBox.Text;

    //try catch for input of the date
    try
    {
        newImage.Date = dateTakenTextBox.Text;
    }
    catch (FormatException)
    {
        MessageBox.Show("Date Not Correct Format");
    }

    try
    {
         newImage.Description = descriptionTextBox.Text;
    }
        catch (FormatException)
        {
            MessageBox.Show("Must user letters and words");
        }
        try
        {
            newImage.Comments = commentsTextBox.Text;
        }
        catch (FormatException)
        {
            MessageBox.Show("Must use letters and words");
        }

        images.Add(newImage);//Add instance to the main list

        if (editCheckBox.Checked)
        {
            //Binding the new updated list to the datagrid
            var source = new BindingSource();

            source.DataSource = images;

            navigationGrid.DataSource = source;

        }

    }

编辑：我现在如何获得它但它似乎不起作用。

    if (startDate.Text == string.Empty)
        {
            var source = new BindingSource();

            source.DataSource = images;

            navigationGrid.DataSource = source;
        }
        else
        {
            string dateFilter = startDate.Text;

            var filteredList = images.Where(item => item.Date == dateFilter);

            var filterSource = new BindingSource();

            filterSource.DataSource = filteredList;

            navigationGrid.DataSource = filterSource;

        }

Answer 1

试试这个：

DateTime temp;
// try to parse the provided string in order to convert it to datetime
// if the conversion succeeds, then build the dateFilter
if(DateTime.TryParse(TrystartDate.Text, out temp))
{
    string dateFilter = temp.ToString("dd/MM/yyyy");
    var filteredList = images.Where(item => item.Date == dateFilter);
    var filterSource = new BindingSource();
    filterSource.DataSource = filteredList;
    navigationGrid.DataSource = filterSource;
}

DataGrid日期字符串过滤器

1 个答案: