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c#中如何將datatable綁定到datagridview

[英]how to bind datatable to datagridview in c#

我需要將我的DataTable綁定到我的DataGridView 我這樣做:

        DTable = new DataTable();
        SBind = new BindingSource();
        //ServersTable - DataGridView
        for (int i = 0; i < ServersTable.ColumnCount; ++i)
        {
            DTable.Columns.Add(new DataColumn(ServersTable.Columns[i].Name));
        }

        for (int i = 0; i < Apps.Count; ++i)
        {
            DataRow r = DTable.NewRow();
            r.BeginEdit();
            foreach (DataColumn c in DTable.Columns)
            {
                r[c.ColumnName] = //writing values
            }
            r.EndEdit();
            DTable.Rows.Add(r);
        }
        SBind.DataSource = DTable;
        ServersTable.DataSource = SBind;

但我得到的只是DataTable ADDS NEW列到我的DataGridView 我不需要這個,我只需要在現有列下寫。

試試這個:

    ServersTable.Columns.Clear();
    ServersTable.DataSource = SBind;

如果您不想清除所有現有列,則必須為每個現有列設置DataPropertyName ,如下所示:

for (int i = 0; i < ServersTable.ColumnCount; ++i) {
  DTable.Columns.Add(new DataColumn(ServersTable.Columns[i].Name));
  ServersTable.Columns[i].DataPropertyName = ServersTable.Columns[i].Name;
}

更好的是:

DataTable DTable = new DataTable();
BindingSource SBind = new BindingSource();
SBind.DataSource = DTable;
DataGridView ServersTable = new DataGridView();

ServersTable.AutoGenerateColumns = false;
ServersTable.DataSource = DTable;

ServersTable.DataSource = SBind;
ServersTable.Refresh();

您告訴可綁定源它綁定到 DataTable,反過來您需要告訴您的 DataGridView 不要自動生成列,因此它只會為您手動輸入到控件中的列提取數據。 .. 最后刷新控件以更新數據綁定。

在 DataGridView 上,將列的 DataPropertyName 設置為 DataTable 的列名。

// 我首先構建了我的數據表,並填充了它的列、行和所有內容。 //然后,一旦數據表起作用,請執行以下操作將其綁定到 DGV。 注意:對於此示例,DGV 的 AutoGenerateColumns 屬性必須為“true”,否則將無法將列名從數據表“分配”到 dgv。 我之前也將我的數據表“添加”到數據集,但我認為沒有必要。

 BindingSource SBind = new BindingSource();
 SBind.DataSource = dtSourceData;

 ADGView1.AutoGenerateColumns = true;  //must be "true" here
 ADGView1.Columns.Clear();
 ADGView1.DataSource = SBind;

 //set DGV's column names and headings from the Datatable properties
 for (int i = 0; i < ADGView1.Columns.Count; i++)
 {
       ADGView1.Columns[i].DataPropertyName = dtSourceData.Columns[i].ColumnName;
       ADGView1.Columns[i].HeaderText = dtSourceData.Columns[i].Caption;
 }
 ADGView1.Enabled = true;
 ADGView1.Refresh();
foreach (DictionaryEntry entry in Hashtable)
{
    datagridviewTZ.Rows.Add(entry.Key.ToString(), entry.Value.ToString());
}
private void Form1_Load(object sender, EventArgs e)
    {
        DataTable StudentDataTable = new DataTable("Student");

        //perform this on the Load Event of the form
        private void AddColumns() 
        {
            StudentDataTable.Columns.Add("First_Int_Column", typeof(int));
            StudentDataTable.Columns.Add("Second_String_Column", typeof(String));

            this.dataGridViewDisplay.DataSource = StudentDataTable;
        }
    }

    //Save_Button_Event to save the form field to the table which is then bind to the TableGridView
    private void SaveForm()
        {
            StudentDataTable.Rows.Add(new object[] { textBoxFirst.Text, textBoxSecond.Text});

            dataGridViewDisplay.DataSource = StudentDataTable;
        }

例如,我們希望通過以下 2 個步驟將 DataTable 'Users' 設置為 DataGridView:第 1 步 - 通過以下方式獲取所有用戶:

public DataTable  getAllUsers()
    {
        OracleConnection Connection = new OracleConnection(stringConnection);
        Connection.ConnectionString = stringConnection;
        Connection.Open();

        DataSet dataSet = new DataSet();

        OracleCommand cmd = new OracleCommand("semect * from Users");
        cmd.CommandType = CommandType.Text;
        cmd.Connection = Connection;

        using (OracleDataAdapter dataAdapter = new OracleDataAdapter())
        {
            dataAdapter.SelectCommand = cmd;
            dataAdapter.Fill(dataSet);
        }

        return dataSet.Tables[0];
    }

步驟 2- 將返回結果設置為 DataGridView :

public void setTableToDgv(DataGridView DGV, DataTable table)
    {
        DGV.DataSource = table;
    }

使用示例:

    setTableToDgv(dgv_client,getAllUsers());

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