C# DataTable转化为string

Question

数据c#string

Answer 1

就是遍历，自己组装，先遍历行，然后遍历该行的cell

Answer 2

这个，循环输出不就OK了
for(int i=0;i<dt.rows.count;i++)
{
write2txt("名字="+dt.rows[i]["姓名"].tostring());
write2txt("年龄="+dt.rows[i]["年龄"].tostring());
write2txt("考点：："+dt.rows[i]["考点"].tostring()+"语文"+dt.rows[i]['语文'].tostring());
}

Answer 3

使用2重for循环搞定,不用定义什么学科数组
List<string> L=new List<string>();
for(int r=0;r<dt.rows.count;r++)
{
if(!L.contains(dt.rows[i][1].Tostring()+dt.rows[i][2].Tostring())
{
L.Add(dt.rows[i][1].Tostring()+dt.rows[i][2].Tostring())str+=dt.columns[1].columnName+"="+dt.rows[i][1]+"\n";
str+=dt.columns[2].columnName+dt.rows[i][2]+"\n";
}
for(int l=4;l<dt.columns.count;l++)
{
str+=dt.rows[i][3]+"::"+dt.columns[l].columnName+"="+dt.rows[i][l]+"\n";
}
}

Answer 4

哦,忘了NULL的不加,加层判断看值是否NULL就行了.

Answer 5

这是我自己写的，还没去掉重复的，感觉自己写的很不好，希望帮忙改下，或者给出更好的。
/// <summary>
        /// DataTable格式化成目标字符串
        /// </summary>
        /// <param name="dt">SQL查询到的数据</param>
        /// <returns></returns>
        private string DataTableToString(DataTable dt, string[] ObjectList)
        {
            StringBuilder sb = new StringBuilder();            if (dt.Rows.Count > 0)
            {
                string prefix = String.Empty;
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        string temp_value = dt.Rows[i][j].ToString();
                        string col_name = dt.Columns[j].ColumnName;
                        if (col_name == "考点")
                        {
                            prefix = temp_value;
                        }
                        if(temp_value != String.Empty)
                        {
                            if(IsContain(col_name, ObjectList))
                            {
                                sb.Append(prefix);
                                sb.Append("::");
                                sb.Append(col_name);
                                sb.Append("=");
                                sb.Append(temp_value);
                                sb.Append("\n");
                            }
                            else
                            {
                                sb.Append(col_name);
                                sb.Append("=");
                                sb.Append(temp_value);
                                sb.Append("\n");
                            }
                        }
                    }
                }
            }
            return sb.ToString();
        }        /// <summary>
        /// 判断字符串是否在数组中
        /// </summary>
        /// <param name="item">字符串</param>
        /// <param name="MesKeyList">字符串列表</param>
        /// <returns>存在返回True</returns>
        private bool IsContain(string item, string[] TestList)
        {
            foreach (string key in TestList)
            {
                if (key == item)
                {
                    return true;
                }
            }
            return false;
        }

Answer 6

contains是LIST自带的方法,不需要自己做函数遍历比较.