Question

（VS 2010 C＃Website）我有TextBox1来过滤将在Datagrid中显示的SQL数据库中的FirstNames，但我无法找出将用户输入从“TextBox1.Text”链接到的正确方法Datagrid筛选的WHERE子句。我试过了：

SelectCommand="SELECT * FROM [TestName] WHERE ([TestFirstName] LIKE '%' + TextBox1.Text + '%')"

Answer 1

SelectCommand="SELECT * FROM [TestName] WHERE ([TestFirstName] LIKE '%' + @TestFirstName2 + '%')">
    <SelectParameters>
        <asp:ControlParameter ControlID="TextBox1" Name="TestFirstName2" 
            PropertyName="Text" Type="String" />
    </SelectParameters>

Answer 2

试试这个：

SelectCommand="SELECT * FROM [TestName] WHERE ([TestFirstName] LIKE '%" + TextBox1.Text + "%')"

注意+ TextBox1.Text +周围的引号。上面的示例似乎是在查找文字字符串TextBox1.Text，而不是TextBox1.Text的实际值。

Answer 3

SelectCommand = "SELECT * FROM [TestName] WHERE ([TestFirstName] LIKE '% " + TextBox1.Text + "%')";

Answer 4

如果使用SqlDataSource或ObjectDataSource将数据绑定到数据网格，则可以简单地将WHERE子句放入您正在使用的DataSource的“FilterExpression”属性中。

protected void ObjectDataSource1_Selecting(object sender, ObjectDataSourceSelectingEventArgs e)
        {
            string filterstr = "";

            if (this.tbSearchEmpID.Text.Trim() != String.Empty)
            {
                filterstr += "EmpId LIKE '%" + this.tbSearchEmpID.Text.Trim() + "%'";
            }

            this.ObjectDataSource1.FilterExpression = filterstr;
        }

C＃Datagrid的WHERE子句的文本框

4 个答案: