Question

我想给每个列添加不同的dwign类（如CSS）。例如，用蓝色绘制的用户名列为30px的放大字体，用红色绘制密码并将其字体更改为'times new romans， 12像素”。我有以下cs代码与SQL中的DB进行通信：

using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public class MyAdoHelper
{
public static SqlConnection ConnectToDB(string fileName)
{
    string path = HttpContext.Current.Server.MapPath("App_Data/");
    path += "Database.mdf";

    string connString = @"Data Source=.\SQLEXPRESS;AttachDbFileName=" +
        path + ";Integrated Security=True;User Instance=True";

    SqlConnection conn = new SqlConnection(connString);

    return conn;

}
public static void DoQuery(string fileName, string sql)
{
    SqlConnection conn = ConnectToDB(fileName);
    conn.Open();
    SqlCommand com = new SqlCommand(sql, conn);
    com.ExecuteNonQuery();
    conn.Close();
}
public static DataTable ExecuteDataTable(string fileName, string sql)
{
    SqlConnection conn = ConnectToDB(fileName);
    conn.Open();
    DataTable dt = new DataTable();
    SqlDataAdapter tableAdapter = new SqlDataAdapter(sql, conn);
    tableAdapter.Fill(dt);
    return dt;
}
public static string printDataTable(string fileName, string sql)
{
    DataTable dt = ExecuteDataTable(fileName, sql);
    string printStr = "<table border='1'>";
    foreach (DataRow row in dt.Rows)
    {
        printStr += "<tr>";
        foreach (object myItemArray in row.ItemArray)
        {
            printStr += "<td>" + myItemArray.ToString() + "</td>";
        }
        printStr += "</tr>";
    }
    printStr += "</table>";
    return printStr;
}

public static bool IsExist(string fileName, string sql)
{
    bool found;
    SqlConnection conn = ConnectToDB(fileName);
    conn.Open();
    SqlCommand com = new SqlCommand(sql, conn);
    SqlDataReader data = com.ExecuteReader();
    found = (bool)data.Read();
    conn.Close();

    return found;
}
public static int RowsAffected(string fileName, string sql)
{
    SqlConnection conn = ConnectToDB(fileName);
    conn.Open();
    SqlCommand com = new SqlCommand(sql, conn);
    int rowsA = com.ExecuteNonQuery();
    conn.Close();

    return rowsA;
}
}

我想改变“printdataTable”，但我不知道。

Answer 1

添加包含您的班级名称的字符串：

string classUserName ="class='username'";
string classPasswords ="class='username'";

您应该更改此部分：

 foreach (object myItemArray in row.ItemArray)
 {
    printStr += "<td>" + myItemArray.ToString() + "</td>";
 }

类似

foreach (DataColumn dataCol in row.Table.Columns)
{
   printStr += String.Format("<td {0}>" + row[dataCol].ToString() + "</td>", dataCol.ColumnName == "UsersColumnName" ? classUserName  : classPasswords);
}

之类的东西（如果你想使用ItemArray）

for (int i=0;i<row.ItemArray.Length;i++)
{
   //if column 0 of the row (0 element of ItemArray) is the user name column
   printStr += String.Format("<td {0}>" + row.ItemArray[i].ToString() + "</td>", i == 0 ? classUserName  : classPasswords);
}

修改

我纠正了这两条建议：

1。在第一个错误是“foreach语句无法对类型'System.Data.DataSet'的变量进行操作，因为'System.Data.DataSet'不包含'GetEnumerator'的定义““

解决方案：需要“Columns”属性才能正确迭代。

2。在第二部分，它不知道“＆lt;”操作

解决方案：row.ItemArray有一个Length属性，而不是Count一个。

编辑2：

关于您的第二条评论，如果您需要添加其他列，则可以执行以下操作：

string classEmails ="class='email'"; for (int i=0;i<row.ItemArray.Length;i++) { //if column 0 of the row (0 element of ItemArray) is the user name column //if column 1 of the row (1st element of ItemArray) is the password column //if column 2 of the row (2nd element of ItemArray) is the email column printStr += String.Format("<td {0}>" + row.ItemArray[i].ToString() + "</td>", i == 0 ? classUserName : (i == 1 ? classPasswords : classEmails)); }

如果数据源中的列数多于三元表达式中的项目，则电子邮件类（三元表达式中的最后一个元素）将应用于所有其他列。

在这种情况下，您应该使用开关，以允许其他列不被格式化：

for (int i=0;i<row.ItemArray.Length;i++) { switch(i){ case 0: //if column 0 of the row (0 element of ItemArray) is the user name column printStr += String.Format("<td {0}>" + row.ItemArray[i].ToString() + "</td>", classUserName); break; case 1: //if column 1 of the row (1st element of ItemArray) is the password column printStr += String.Format("<td {0}>" + row.ItemArray[i].ToString() + "</td>", classPasswords); break; case 2: //if column 2 of the row (2nd element of ItemArray) is the email column printStr += String.Format("<td {0}>" + row.ItemArray[i].ToString() + "</td>", classEmails); break; default: //any column you do not want to style printStr += "<td>" + row.ItemArray[i].ToString() + "</td>"; break; } }

数据库表中每列的不同CSS类

1 个答案: