我有一个表单,当我从ComboBox中选择一个列名,然后键入一个文本框时,它会过滤并在DataGridView中显示搜索到的条件。当我搜索"参考"这是一个int数据类型,也是标识和主键。我收到错误消息:
"无法表演'喜欢'在System.Int32和System.String上操作。"
我的代码是
DataTable dt;
private void searchForm_Load(object sender, EventArgs e)
{
SqlCeConnection con = new SqlCeConnection(@"Data Source=|DataDirectory|\LWADataBase.sdf;");
SqlCeDataAdapter sda = new SqlCeDataAdapter("select * from customersTBL", con);
dt = new DataTable();
sda.Fill(dt);
dataGridView1.DataSource = dt;
comboSearch.Items.Add("[Reference]");
comboSearch.Items.Add("[First Name]");
comboSearch.Items.Add("[Surename]");
comboSearch.Items.Add("[Address Line 1]");
comboSearch.Items.Add("[Address Line 2]");
comboSearch.Items.Add("[County]");
comboSearch.Items.Add("[Post Code]");
comboSearch.Items.Add("[Contact Number]");
comboSearch.Items.Add("[Email Address]");
}
private void searchTxt_TextChanged(object sender, EventArgs e)
{
if (comboSearch.SelectedItem == null)
{
searchTxt.ReadOnly = true;
MessageBox.Show("Please select a search criteria");
}
else
{
searchTxt.ReadOnly = false;
DataView dv = new DataView(dt);
dv.RowFilter = "" + comboSearch.Text.Trim() + "like '%" + searchTxt.Text.Trim() + "%'";
dataGridView1.DataSource = dv;
}
}
答案 0 :(得分:10)
将数字转换为过滤器内的字符串:
dv.RowFilter = string.Format("CONVERT({0}, System.String) like '%{1}%'",
comboSearch.Text.Trim(), searchTxt.Text.Trim());
答案 1 :(得分:0)
也许尝试一下?
dv.RowFilter = "'%" + comboSearch.Text.Trim() + "%' like '%" + searchTxt.Text.Trim() + "%'";
它可能只是一个缺少的引号,因为查询读作
" 123 like '%123%' "
答案 2 :(得分:0)
代码试图从gridview(devexpress)中搜索..
DataRow[] dr = dt.Select("invoiceId ='" + Convert.ToInt32(gridView1.GetRowCellValue(id, "invoiceId")) + "' AND '%" + Convert.ToDouble(gridView1.GetRowCellValue(id, "Amount_Paid")) + "%' LIKE '%" + Convert.ToDouble(gridView1.GetRowCellValue(id, "Amount")) + "%' ");
if (dr.Length > 0)
{
MessageBox.Show("already paid");
}