Question

我已经使用DataAdapter填充了DataTable，但我想为DataTable中该列中的所有行动态更改值。我该怎么做呢？

这是我目前的代码：

SqlConnection conn = null;
string sSQL = "";
string connString = "Datasourceetc";

sSQL = "SELECT TEST_ID FROM TEST_TABLE";

SqlDataAdapter sda = new SqlDataAdapter(sSQL, conn);

DataTable dt = new DataTable();

sda.Fill(dt);

foreach (DataRow row in dt.Rows)
{
  dt.Columns["TEST_ID"] = "changed"; //Not changing it?!
}

GridView1.DataSource = dt;

GridView1.DataBind();

由于

Answer 1

上面的所有内容看起来都不错，除非在遍历行时您可以像这样访问列...

foreach (DataRow row in dt.Rows)
{
  row["ColumnName"] = "changed"; //Not changing it?!
}

Answer 2

您需要先填写，然后再进行更改！

SqlConnection conn = new SqlConnection(connString);
string sSQL = "SELECT TEST_ID FROM TEST_TABLE";

DataTable dt = new DataTable();

SqlDataAdapter sda = new SqlDataAdapter(sSQL, conn);

// fill the DataTable - now you should have rows and columns!
sda.Fill(dt);

// one you've filled your DataTable, you should be able
// to iterate over it and change values
foreach (DataRow row in dt.Rows)
{
    row["TEST_ID"] = "changed"; //Not changing it?!
}

GridView1.DataSource = dt;
GridView1.DataBind();

马克

如何更改数据表列中的特定数据？

2 个答案: