Question

我有一个DataTable，我想删除与List< string>匹配的所有行，该怎么做？以下是我的代码，

public static DataTable GetSkills(List<Skill> EnteredSkills)
{
    DataTable dt = new DataTable();
    dt = GetDBMaster("SkillMaster");
    List<string> MatchingSkills = EnteredSkills.Select(c => c.Text).ToList();
    //Logic to Delete rows MatchingSkills from dt here
    return dt;
}

最终解决方案

    public static DataTable GetSkills(List<Skill> EnteredSkills)
    {
        DataTable dt = new DataTable();
        dt = GetDBMaster("SkillMaster");
        var MatchingSkills = new HashSet<string>(EnteredSkills.Select(c => c.Text));
        List<DataRow> removeRows = dt.AsEnumerable().Where(r => MatchingSkills.Contains(r.Field<string>("DataTableSkillColumnName"))).ToList();
        removeRows.ForEach(dt.Rows.Remove);
        return dt;
    }

Answer 1

假设该列为SkillName

List<DataRow> removeRows = dt.AsEnumerable()
    .Where(r => MatchingSkills.Contains(r.Field<string>("SkillName")))
    .ToList();
removeRows.ForEach(dt.Rows.Remove);

旁注：我会使用HashSet<string>因为效率更高：

var MatchingSkills = new HashSet<string>(EnteredSkills.Select(c => c.Text));

Answer 2

最简单的方法是：

var lstRemoveColumns = new List<string>() { "ColValue1", "ColVal2", "ColValue3", "ColValue4" };
List<DataRow> rowsToDelete = new List<DataRow>();

foreach (DataRow row in dt.Rows) 
{
    if (lstRemoveColumns.Contains(row["ColumnName"].ToString())) 
    {
        rowsToDelete.Add(row);
    }
}

foreach (DataRow row in rowsToDelete) 
{
    dt.Rows.Remove(row);
}

dt.AcceptChanges();

看here

Answer 3

此解决方案效果很好！我将其用于解决方案。

html,
body {
  margin: 0;
}

.container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex-grow: 1;
  display: flex;
  background-color: #eee;
}

.panel1,
.panel2 {
  background-color: brown;
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.panel-content {
  background-color: #ccc;
  padding: 3em;
}

header,
footer {
  background-color: #ccc;
  padding: 1em;
  text-align: center;
}

从匹配List <string>的数据表中删除行

3 个答案: