Question

我在该表格中有一个表格 Reviws 我有专栏说明所以用户可以添加说明。现在我需要的是描述段落需要忽略一些单词和显示。

我有一些像

这样的词

a is about above after again against all

这是示例段落。

阿努拉德普勒是斯里兰卡的一个主要城市。它是斯里兰卡中北部省份和阿努拉德普勒区的首府。

但我希望只显示一些像这样的话

阿努拉德普勒主要城市斯里兰卡首都城市中北部，斯里兰卡首都阿努拉德普勒区。

这就是现在我如何显示我的描述

Review.aspx.cs

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        this.BindGrid();
    }
}

private void BindGrid()
{
    string constr = "Data Source=(localdb)\\ProjectsV13;Initial Catalog=ReviewDB;Integrated Security=True";
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT Description, Place FROM Reviews"))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                using (DataTable dt = new DataTable())
                {
                    sda.Fill(dt);
                    GridView1.DataSource = dt;
                    GridView1.DataBind();
                }
            }
        }
    }
}

Review.aspx

    <body>

    <form id="form1" runat="server">
        <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" AllowPaging="true"
    OnPageIndexChanging="OnPaging" PageSize="10">
    <Columns>
        <asp:BoundField ItemStyle-Width="500px" DataField="Description" HeaderText="Description" />

    </Columns>
</asp:GridView>
    </div>

    </form>
</body>

Answer 1

如果您的单词仅以空格分隔，这应该很简单：

var DescWords = Description.Split(" ".ToCharArray());

//WordsToRemove is the list of words that you don't want to show.
var NewDesc = String.Join(" ", DescWords.Except(WordsToRemove));

确保在文件顶部添加using System.Linq;。另请注意，您需要将Description替换为要修复的实际DataTable值的名称。例如，这可能是dt[0]["Description"]或其他内容。

如果您的描述中包含其他标点符号，则会更加复杂，但仍可轻松实现。

修改

如果您的字符串包含多个分隔符，您可以像这样处理它：

var WordsToRemove = new[] { "a", "is", "about", "above", "after", "again", "against", "all" };

var Delimiters = ".,;: ()!?/";
int LastIndex = 0;
var NewDesc = "";

for (int row = 0; row < dt.Rows.Count; row++)
{
  var Description = dt.Rows[row]["Description"].ToString();
for (int i = 0; i < Description.Length; i++)
{
  if (Delimiters.IndexOf(Description[i]) >= 0)
  {
    var Word = Description.Substring(LastIndex, i - LastIndex + 1);
    if (WordsToRemove.Contains(Word.Trim(Delimiters.ToCharArray())))
      NewDesc += Description[i];
    else
      NewDesc += Word;

    LastIndex = i + 1;
  }
}
}

在代码中的sda.Fill(dt);行下方注入此代码。在现实世界中，这样的问题稍有不同地解决，例如，您应该考虑将此代码移动到一个函数中，另外您应该使用StringBuilder代替string，但由于您是初学者，我只是为您留下提示。

Answer 2

访问DataTable的内容：

string myData=dt.Rows[0][1].ToString();

为字符串的循环创建一个循环以删除所需的单词

string bannedWords = @"\b(this|is|the|list|of|banned|words)\b";

foreach(data in myData)
    string replaced = Regex.Replace(data, bannedWords, "", RegexOptions.IgnoreCase);

然后在GridView

中插入字符串

Answer 3

这是用于删除字符串中不需要的单词的代码段

string description = "Anuradhapura is a major city in Sri Lanka. It is the capital city of North Central Province, Sri Lanka and the capital of Anuradhapura District";
List<string> ignoredWords = new List<string>() { "a","is","about","above","after","again","against","all", "just", "text","of","and","it","the" };
description = string.Join(" ", description.Split().Where(words => !ignoredWords.Contains(words, StringComparer.InvariantCultureIgnoreCase)));

<强>输出

Anuradhapura major city in Sri Lanka. capital city North Central Province, Sri Lanka capital Anuradhapura District

现在，根据您的要求，我已合并代码以提供完整的答案。

在这里，我创建了一个示例DataTable，而您从Database获得了该示例，并且我已删除了分页，请将其添加到您的代码中。

<强> ASPX

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" AllowPaging="true" OnPageIndexChanging="OnPaging" PageSize="10" OnRowDataBound="GridView1_RowDataBound">
  <Columns>
  <asp:BoundField ItemStyle-Width="500px" DataField="Description" HeaderText="Description" />
</Columns>

我在这里添加了OnRowDataBound个事件。

<强> CS

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        this.BindGrid();
    }
}

private void BindGrid()
{
    string constr = "Data Source=(localdb)\\ProjectsV13;Initial Catalog=ReviewDB;Integrated Security=True";
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT Description, Place FROM Reviews"))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                using (DataTable dt = new DataTable())
                {
                    sda.Fill(dt);
                    GridView1.DataSource = dt;
                    GridView1.DataBind();
                }
            }
        }
    }
}


//In `RowDataBound` I'm doing all the manipulations
   protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        DataRowView drv = (DataRowView)e.Row.DataItem;
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            if (drv["Description"] != DBNull.Value)
            {
                string description = Convert.ToString(drv["Description"]);
                e.Row.Cells[0].Text = RemoveUnwanedWords(description);
            }
        } 
    }

    public string RemoveUnwanedWords(string description)
    {
        List<string> ignoredWords = new List<string>() { "a", "is", "about", "above", "after", "again", "against", "all", "just", "text", "of", "and", "it", "the" };
        return string.Join(" ", description.Split().Where(words => !ignoredWords.Contains(words, StringComparer.InvariantCultureIgnoreCase)));
    }

如何使用带有Asp.net网络表单的C＃忽略段落中的某些单词？

3 个答案:

修改