通过 C# 文本框过滤 DataGridView，每个单词作为过滤器

Question

我想根据文本框的每个单词过滤网格视图。每次我连续添加一个单词时，过滤器都必须在数据网格中搜索。但在下面的代码中，它仅根据最后一个词结束返回搜索。请注意，我使用的是数据网格视图。

任何建议

private void textBox1_TextChanged(object sender, EventArgs e) {

        int count = textBox1.Text.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Count();
        label68.Text = count.ToString();
        string[] nameParts = textBox1.Text.Split(' ');
        int cnlp = 1;

        while (cnlp <= count)
        {
            string loopcount = nameParts[(cnlp - 1)];
            lbtest5.Text = loopcount.ToString();
            var bd = (BindingSource)dgvShopDrawings.DataSource;
            var dt = (DataTable)bd.DataSource;
            dt.DefaultView.RowFilter = string.Format("DrawingID like '%{0}%' or title like '%{0}%'  or  level like '%{0}%'", lbtest5.Text.Replace("'", "''"));
            dgvShopDrawings.Refresh();
            ShopDrawingRecordCount = dt.Rows.Count;
            SdDgvStatusCount.Text = String.Format("Records In {0} / {1} ", dgvShopDrawings.Rows.Count, ShopDrawingRecordCount);
            cnlp = cnlp + 1;
        }

    }

Answer 1

RowFilter returns 最近应用的过滤器，这就是为什么你得到最后应用的过滤器（文本框中的最后一个字）。对 RowFilter 使用 in 条件而不是 =。在循环中创建 in 条件兼容字符串，并将其应用于循环外的数据表。

尝试相应地更改代码。我用 in 条件更改了发布的代码。可能是一些编译错误，因为我没有编译。

string RowFilter="";
         int count = textBox1.Text.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Count();
         label68.Text = count.ToString();
         string[] nameParts = textBox1.Text.Split(' ');
         int cnlp = 0;
            while (cnlp < nameParts.Count())
        {
            string loopcount =nameParts[cnlp];

          RowFilter+="'" +  loopcount + "',";


            cnlp = cnlp + 1;
        }

            if (RowFilter != "")
                RowFilter = RowFilter.Substring(0, RowFilter.Length - 1);

            var bd = (BindingSource)dgvShopDrawings.DataSource;
            var dt = (DataTable)bd.DataSource;
            dt.DefaultView.RowFilter = string.Format("DrawingID in ({0}) or title in ({0})  or  level in ({0})", RowFilter);
            dgvShopDrawings.Refresh();
            int ShopDrawingRecordCount = dt.Rows.Count;
            SdDgvStatusCount.Text = String.Format("Records In {0} / {1} ", dgvShopDrawings.Rows.Count, ShopDrawingRecordCount);

Answer 2

您每次迭代都在替换 RowFilter，因此它当然只显示最后一个。

试试这样的方法：

        int count = textBox1.Text.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Count();
        label68.Text = count.ToString();
        string[] nameParts = textBox1.Text.Split(' ');
        int cnlp = 1;

        string rowfilter = "";
        while (cnlp <= count)
        {
            string loopcount = nameParts[(cnlp - 1)];
            lbtest5.Text = loopcount.ToString();
            if (rowfilter.Length > 0) rowfilter += " AND ";
            rowfilter += tring.Format("(DrawingID like '%{0}%' or title like '%{0}%' or level like '%{0}%')", lbtest5.Text.Replace("'", "''"));
            cnlp = cnlp + 1;
        }

        var bd = (BindingSource)dgvShopDrawings.DataSource;
        var dt = (DataTable)bd.DataSource;
        dt.DefaultView.RowFilter = rowfilter;
        dgvShopDrawings.Refresh();
        ShopDrawingRecordCount = dt.Rows.Count;
        SdDgvStatusCount.Text = String.Format("Records In {0} / {1} ", dgvShopDrawings.Rows.Count, ShopDrawingRecordCount);

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