如何从文本框中过滤gridview？
我需要过滤一个从表中检索过滤数据的gridview。 因此，我将gridview绑定到数据集。 现在我似乎无法找到进一步过滤它的解决方案。
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { DataSet ds = new DataSet(); SqlConnection myCon = new SqlConnection(connectionstring); SqlDataAdapter adapter = new SqlDataAdapter(cmd, myCon); adapter.Fill(ds); GridView1.DataSource = ds; GridView1.DataBind(); } } protected void Button1_Click(object sender, EventArgs e) { //need to insert code here for filtering GridView1 based on TextBox1.Text } 谢谢您的帮助。
试试这个：
protected void Button1_Click(object sender, EventArgs e) { DataSet ds = new DataSet(); SqlConnection myCon = new SqlConnection(connectionstring); SqlDataAdapter adapter = new SqlDataAdapter(cmd, myCon); adapter.Fill(ds); DataView view = new DataView(); view.Table = ds.Tables[0]; view.RowFilter = "ColumnName = " + TextBox1.Text.Trim(); GridView1.DataSource = view; GridView1.DataBind(); }
- 你必须重构你的代码。
这是一个完整的示例，它处理GridView的paging ， sorting （两个方向）和filtering （两列）。
// store sorting across postbacks in a ViewState variable public string SortExpression { get { if (ViewState["GridSort"]== null) { ViewState["GridSort"] = "Column1 ASC"; } return ViewState["GridSort"].ToString(); } set { ViewState["GridSort"] = value; } } protected void Page_load(object sender, EventArgs e) { if (!Page.IsPostBack) { BindGrid(); } }
这是完成所有操作的主要方法（包括filter -function）：
private void BindGrid() { try { var tblData = new DataTable(); var filter1 = TextBox1.Text.Trim(); var filter2 = TextBox2.Text.Trim(); using (var sqlCon = new System.Data.SqlClient.SqlConnection(connectionstring)) { String sql = String.Empty; var sqlCmd = new System.Data.SqlClient.SqlCommand(); if (filter1.Length != 0 && filter2.Length != 0) { sql = "SELECT Column1,Column2 FROM Table WHERE Column1 LIKE @Column1 AND Column2 LIKE @Column2 ORDER BY {0}"; sqlCmd.Parameters.AddWithValue("@Column1", string.Format("%{0}%", filter1)); sqlCmd.Parameters.AddWithValue("@Column2", string.Format("%{0}%", filter2)); } else if (filter1.Length != 0) { sql = "SELECT Column1,Column2 FROM Table WHERE Column1 LIKE @Column1 ORDER BY {0}"; sqlCmd.Parameters.AddWithValue("@Column1", string.Format("%{0}%", filter1)); } else if (filter2.Length != 0) { sql = "SELECT Column1,Column2 FROM Table WHERE Column2 LIKE @Column2 ORDER BY {0}"; sqlCmd.Parameters.AddWithValue("@Column2", string.Format("%{0}%", filter2)); } else { // no filter, select all sql = "SELECT Column1,Column2 FROM Table ORDER BY {0}"; } sqlCmd.CommandText = string.Format(sql, this.SortExpression); sqlCmd.Connection = sqlCon; using (System.Data.SqlClient.SqlDataAdapter objAdapter = new System.Data.SqlClient.SqlDataAdapter(sqlCmd)) { objAdapter.Fill(tblData); } } GridView1.DataSource = tblData; GridView1.DataBind(); } catch (Exception) { // log throw; } }
Paging ：
private void GridView1_PageIndexChanging(object sender, System.Web.UI.WebControls.GridViewPageEventArgs e) { this.GridView1.PageIndex = e.NewPageIndex; BindGrid(); }
筛选键式点击：
private void BtnFilter_Click(object sender, System.EventArgs e) { BindGrid(); }
Sorting ：
protected void GridView1_Sorting(object sender, System.Web.UI.WebControls.GridViewSortEventArgs e) { string currentSortColumn = null; string currentSortDirection = null; currentSortColumn = this.SortExpression.Split(' ')[0]; currentSortDirection = this.SortExpression.Split(' ')[1]; if (e.SortExpression.Equals(currentSortColumn)) { //switch sort direction switch (currentSortDirection.ToUpper()) { case "ASC": this.SortExpression = currentSortColumn + " DESC"; break; case "DESC": this.SortExpression = currentSortColumn + " ASC"; break; } } else { this.SortExpression = e.SortExpression + " ASC"; } BindGrid(); }
刚从VB手动转换，所以我希望没有剩余的错误。
sql = new SqlConnection(Connection.con); adapter = new SqlDataAdapter(@"select EntryID * from Table where Name like @Name ", sql); adapter.SelectCommand.Parameters.AddWithValue("@Name", string.Format("%{0}%", textBox1.Text)); dt = new DataTable(); adapter.Fill(dt); dataGridView1.DataSource = dt;